Is CNC Stronger Than Cast?

1. Ներածություն

In recent years, the quest for lightweight, ամուր, and cost-effective components has intensified.

Aerospace engineers seek turbine blades that withstand 1,400°C combustion temperatures;

automotive designers push engine blocks to handle 200MPa peak cylinder pressures; orthopedic surgeons demand titanium implants that endure 10⁷ loading cycles without failure.

Amid these challenges, the debate rages: Are CNC-machined parts inherently stronger than cast parts?

To answer this, we must first clarify what “strength” entails—tensile and yield values, հոգնածության կյանք,

Ազդեցության կոշտություն, and wear resistance—then compare how CNC machining and various casting methods measure up across these criteria.

Ի վերջո, the most robust solution often lies in a tailored combination of processes, նյութեր, and post-treatments.

2. CNC Machining Metal

CNC (Համակարգչային թվային հսկողություն) վերամբարձ է subtractive manufacturing process, meaning it removes material from a solid workpiece—usually a wrought metal billet—to produce a precisely defined final geometry.

The process is controlled by computer programs that dictate tool paths, speeds, and feeds, enabling the consistent production of high-accuracy parts.

Subtractive Process: From Billet to Finished Part

The typical workflow begins with selecting a wrought billet of metal such as 7075 ալյումին, 316 չժանգոտվող պողպատ, կամ Ti-6Al-4V titanium.

The billet is then clamped into a CNC mill or lathe, որտեղ rotating cutting tools կամ turning inserts systematically remove material along programmed axes.

The result is a finished part with exceptionally tight dimensional tolerances, high surface quality, մի քանազոր mechanically robust properties.

Բնորոշ նյութեր: Wrought Alloys

• Ալյումինե խառնուրդներ: Է.Գ., 6061‑T6, 7075‑T6 – known for light weight, մեքենայություններ, and strength-to-weight ratio.
• Steel Alloys: Է.Գ., 1045, 4140, 316, 17-4PH – offering superior mechanical strength and wear resistance.
• Titanium համաձուլվածքներ: Է.Գ., Ti-6Al-4V – valued for corrosion resistance, կենսահամատեղելիություն, and high strength-to-weight performance.
• Այլ մետաղներ: Փող, պղնձ, մագնեզիում, Ինքնորոշ, and more can also be CNC-machined for specialized applications.

Հիմնական հատկանիշները

• Ծավալային ճշգրտություն: ±0.005 mm or better with advanced multi-axis CNC machines.
• Մակերեւույթի ավարտը: As-machined finishes typically achieve ՀՀ 0.4-1,6 մկմ, with further polishing reaching Ռա < 0.2 մկմ.
• Կրկնողություն: Ideal for both low and medium batch production with minimal variation.
• Tool Flexibility: Supports milling, հորատում, դարձ, ձանձրալի, թելիկ, and engraving in one setup on 5-axis machines.

Pros of CNC Machining

• Superior Mechanical Strength:
  Parts retain the fine-grain structure of wrought metals, typically showing 20–40% higher strength than cast counterparts.
• High Precision and Tolerance Control:
  CNC machining can meet tolerances as tight as ±0.001 mm, Էական օդատիեզերքի համար, բժշկական, and optical components.
• Excellent Surface Integrity:
  Հարթ, uniform surfaces with low roughness improve fatigue resistance, կնքման կատարումը, և գեղագիտություն.
• Նյութական բազմակողմանիություն:
  Compatible with virtually all industrial metals, from soft aluminum to hard superalloys like Inconel and Hastelloy.
• Rapid Prototyping and Customization:
  Ideal for small to medium batches, iterative design testing, and unique part geometries without expensive tooling.
• Minimal Internal Defects:
  Machined parts are generally free from porosity, նեղացող խոռոչներ, or inclusions—common issues in casting.

Cons of CNC Machining

• Material Waste:
  Being subtractive, CNC machining often results in 50–80% material loss, հատկապես բարդ երկրաչափությունների համար.
• High Cost for Large Production Runs:
  Per-unit costs remain high without economies of scale, and extensive tool wear may further increase operational expenses.
• Longer Cycle Times for Complex Parts:
  Intricate geometries requiring multiple setups or tools may significantly increase machining time.
• Limited Internal Complexity:
  Internal passages and undercuts are difficult to achieve without special fixtures, and often require EDM or modular designs.
• Requires Skilled Programming and Setup:
  Precision programming and tooling strategies are essential to achieve optimal efficiency and part quality.

3. Մետաղների ձուլում

Metal casting remains one of the oldest and most versatile manufacturing methods, enabling the economical production of parts that range from a few grams to multiple tons.

By pouring molten metal into molds—either single‑use or reusable—casting delivers near‑net shapes, complex internal features, and large cross‑sections that would be difficult or prohibitively expensive to machine from solid billets.

Overview of Common Casting Methods

1. Ավազի ձուլում

• Ընթացք: Pack sand around a pattern, remove the pattern, and pour metal into the resulting cavity.
• Typical Volumes: 10–10,000 units per pattern.
• Հանդուրժողականություն: ± 0.5–1.5 mm.
• Մակերեւույթի կոպտություն: ՀՀ 6-12 մկմ.

2. Ներդրումների ձուլում (Lost‑Wax)

• Ընթացք: Create a wax pattern, coat it in ceramic slurry, melt out the wax, then pour metal into the ceramic mold.
• Typical Volumes: 100–20,000 units per mold.
• Հանդուրժողականություն: ± 0.1–0.3 mm.
• Մակերեւույթի կոպտություն: ՀՀ 0.8-3.2 մկմ.

3. Die Casting

• Ընթացք: Inject molten non‑ferrous metal (ալյումին, ցինկ) into high‑precision steel dies under high pressure.
• Typical Volumes: 10,000–1,000,000+ units per die.
• Հանդուրժողականություն: ± 0.05–0.2 mm.
• Մակերեւույթի կոպտություն: ՀՀ 0.8-3.2 մկմ.

4. Lost‑Foam Casting

• Ընթացք: Replace sand patterns with expanded polystyrene foam; the foam vaporizes upon metal contact.
• Typical Volumes: 100–5,000 units per pattern.
• Հանդուրժողականություն: ± 0.3–0.8 mm.
• Մակերեւույթի կոպտություն: Ra 3.2–6.3 µm.

5. Մշտական ​​բորբոս ձուլում

• Ընթացք: Reusable metal molds (often steel) are filled by gravity or low pressure, then cooled and opened.
• Typical Volumes: 1,000–50,000 units per mold.
• Հանդուրժողականություն: ± 0.1–0.5 mm.
• Մակերեւույթի կոպտություն: Ra 3.2–6.3 µm.

Typical Casting Materials

1. Cast Irons (Մոխրագույն, Դքսություններ, White)

• Ծրագրեր: Շարժիչի բլոկներ, Պոմպային տներ, Մեքենայի հիմքերը.
• Բնութագրերը: high damping, compressive strength up to 800 MPA, moderate tensile strength (200–400 MPa).

2. Cast Steels

• Ծրագրեր: Press նշման անոթներ, Ծանր տեխնիկայի բաղադրիչներ.
• Բնութագրերը: tensile strength 400–700 MPa, toughness up to 100 MPa·√m after heat treatment.

3. Ալյումին Cast Alloys (A356, A319, Եվ այլն)

• Ծրագրեր: automotive wheels, aerospace structural parts.
• Բնութագրերը: tensile strength 250–350 MPa, density ~2.7 g/cm³, Լավ կոռոզիոն դիմադրություն.

4. Պղնձ, Մագնեզիում, Ցինկի համաձուլվածքներ

• Ծրագրեր: Էլեկտրական միակցիչներ, aerospace fittings, Դեկորատիվ սարքավորումներ.
• Բնութագրերը: excellent conductivity (պղնձ), ցածր խտություն (մագնեզիում), tight tolerance capability (ցինկ).

Key Features of Casting

• Near‑Net Shape Capability: Minimizes machining and material waste.
• Complex Geometry: Easily produces internal cavities, կողիկներ, թերագնահատում, and bosses.
• Հասանելի: Դեպի a few hundred դեպի millions of parts, depending on method.
• Large Part Production: Capable of casting components weighing several tons.
• Alloy Flexibility: Allows specialized compositions not readily available in wrought form.

Pros of Metal Casting

• Cost‑Effective Tooling for High Volumes: Die casting amortizes tooling over hundreds of thousands of parts, reducing per‑piece cost by up to 70% compared to CNC.
• Design Freedom: Intricate internal passages and thin walls (as low as 2 mm in investment casting) are possible.
• Material Savings: Near‑net shapes reduce scrap, especially in large or complex parts.
• Size Versatility: Produces very large parts (Է.Գ., marine engine blocks) that are impractical to machine.
• Rapid Batch Production: Die-cast parts can cycle every 15–45 seconds, meeting high-volume demands.

Cons of Metal Casting

• Inferior Mechanical Properties: As‑cast microstructures—dendritic grains and porosity—yield tensile strengths 20–40% lower and fatigue lives 50–80% shorter than wrought/CNC counterparts.
• Surface and Dimensional Limitations: Coarser finishes (Ra 3–12 µm) and looser tolerances (± 0.1–1.5 mm) often necessitate secondary machining.
• Potential for Casting Defects: Shrinkage voids, gas porosity, and inclusions can act as crack initiation sites.
• High Initial Tooling Cost for Precision Molds: Investment casting and die casting molds can exceed US $50,000–$200,000, requiring high volumes to justify expense.
• Longer Lead Times for Tooling Fabrication: Designing, արտադրություն, and validating complex molds can take 6–16 weeks before first parts are produced.

4. Material Microstructure and Its Influence on Strength

The microstructure of a metal—its grain size, ձեւավորել, and defect population—fundamentally governs its mechanical performance.

Wrought vs. As‑Cast Grain Structures

Wrought alloys undergo hot or cold deformation followed by controlled cooling, producing տուգանք, equiaxed grains often on the order of 5–20 µm in diameter.

By contrast, as‑cast alloys solidify in a thermal gradient, կազմող dendritic arms մի քանազոր segregation channels with average grain sizes of 50–200 µm.

• Impact on Strength: According to the Hall–Petch relationship, halving grain size can boost yield strength by 10–15%.
  Օրինակ, wrought 7075‑T6 aluminum (grain size ~10 µm) typically achieves a yield strength of 503 MPA, whereas cast A356‑T6 aluminum (grain size ~100 µm) peaks around 240 MPA.

Ծակոտկենություն, Ներդրումներ, and Defects

Casting processes can introduce 0.5–2% volumetric porosity, along with oxide or slag inclusions.

These microscale voids act as Սթրեսի կոնցենտրատորներ, drastically reducing fatigue life and fracture toughness.

• Fatigue Example: A cast aluminum alloy with 1% porosity may see a 70–80% shorter fatigue life under cyclic loading compared to its wrought counterpart.
• Fracture Toughness: Wrought 316 stainless steel often exhibits K_IC values above 100 MPa·√m, while sand‑cast 316 SS may only reach 40–60 MPa·√m.

Heat Treatment and Work‑Hardening

CNC‑machined components can leverage advanced heat treatments—մարսած, մեռած, կամ precipitation hardening—to tailor microstructures and maximize strength and toughness.

Օրինակ, solution‑treated and aged Ti‑6Al‑4V can reach tensile strengths above 900 MPA.

By comparison, cast parts typically receive homogenization to reduce chemical segregation, and sometimes solution treatment,

but they cannot attain the same uniform precipitation microstructure as wrought alloys.

Արդյունքում, cast superalloys may achieve tensile strengths of 600–700 MPa post‑treatment, solid but still below wrought equivalents.

Work‑Hardening and Surface Treatments

Բացի այդ, CNC machining itself can introduce beneficial compressive residual stresses on critical surfaces,

particularly when combined with shot‑peening, which improves fatigue resistance by up to 30%.

Casting lacks this mechanical work‑hardening effect unless subsequent treatments (Է.Գ., cold rolling or peening) are applied.

5. Mechanical Properties Comparison

To determine whether CNC-machined components are stronger than cast ones, a direct comparison of their Մեխանիկական հատկություններ—including tensile strength, Հոգնածության դիմադրություն, and impact toughness—is essential.

While material choice and design both play a role, the manufacturing process itself significantly affects the final performance of the part.

Առաձգական եւ բերքատվություն ուժ

Tensile strength measures the maximum stress a material can withstand while being stretched or pulled before breaking, մինչդեռ բերք տալ ուժ indicates the point at which permanent deformation begins.

CNC-machined parts are typically made from wrought alloys, which exhibit refined microstructures due to mechanical working and thermomechanical processing.

• Wrought Aluminum 7075-T6 (CNC Machined):

• • Բերք տալ ուժ: 503 MPA
  • Ultimate Tensile Strength (UTS): 572 MPA

• Cast Aluminum A356-T6 (Heat Treated):

• • Բերք տալ ուժ: 240 MPA
  • UTS: 275 MPA

Similarly, wrought titanium (TI-6AL-4V) processed via CNC machining may reach a UTS of 900-950 MPA,

whereas its cast version typically tops out around 700-750 ՄՊա due to the presence of porosity and a less refined microstructure.

Եզրափակում: CNC-machined components from wrought materials typically offer 30–50% higher yield and tensile strength than their cast counterparts.

Fatigue Life and Endurance Limit

Fatigue performance is critical in aerospace, բժշկական, and automotive parts subjected to cyclic loading.

Ծակոտկենություն, ընդգրկումներ, and surface roughness in cast parts severely reduce fatigue resistance.

• Wrought Steel (CNC): Endurance limit ~ 50% of UTS
• Cast Steel: Endurance limit ~ 30–35% of UTS

Օրինակ, in AISI 1045:

• CNC-machined (wrought): Endurance limit ~ 310 MPA
• Cast equivalent: Endurance limit ~ 190 MPA

CNC machining also provides smoother surfaces (Ra 0.2–0.8 μm), which delays crack initiation. Ի հակադրություն, as-cast surfaces (Ra 3–6 μm) can act as initiation sites, accelerating failure.

Impact Toughness and Fracture Resistance

Impact toughness quantifies a material’s ability to absorb energy during sudden impacts, and is especially important for parts in crash-prone or high-strain environments.

Cast metals often contain microvoids or shrinkage cavities, reducing their energy absorption capacity.

• Wrought Steel (Charpy V-notch at room temp):>80 Ժլատ
• Cast Steel (same conditions):<45 Ժլատ

Even after heat treatment, castings rarely reach the fracture toughness values of wrought products due to persistent internal flaws and anisotropic structures.

Կարծրություն և մաշվածության դիմադրություն

While casting allows for surface hardening treatments like case hardening կամ induction hardening,

CNC-machined parts often benefit from work hardening, precipitation treatments, կամ ազոտավորում, yielding consistent surface hardness across the part.

• CNC-machined 17-4PH stainless steel: մինչեւ ԲՈՀ 44
• Cast 17-4PH (aged): սովորաբար HRC 30–36

When surface integrity is critical—for example, in bearing housings, կաղապարներ, or rotating shafts—CNC machining provides a superior, more predictable wear profile.

6. Residual Stress and Anisotropy

When comparing CNC-machined and cast components, evaluating residual stress մի քանազոր anisotropy is vital to understanding how each manufacturing process influences structural integrity, ծավալային կայունություն, and long-term performance.

These two factors, though often less discussed than tensile strength or fatigue life,

can significantly affect a component’s behavior under real-world operating conditions, particularly in high-precision applications like aerospace, Բժշկական սարքեր, and automotive powertrains.

Residual Stress: Origins and Effects

Residual stress refers to the internal stresses retained in a component after manufacturing, even when no external forces are applied.

These stresses may lead to warping, cracking, or premature failure if not properly managed.

▸ CNC-Machined Components

CNC հաստոցներ, being a subtractive process, can induce mechanical and thermal stresses primarily near the surface. These residual stresses arise from:

• Cutting forces and tool pressure, especially during high-speed or deep-pass operations
• Localized thermal gradients, caused by frictional heat between the cutting tool and material
• Interrupted cuts, which can create uneven stress zones around holes or sharp transitions

While machining-induced residual stresses are generally shallow and localized, they can influence ծավալային ճշգրտություն, especially in thin-walled or high-precision parts.

Սակայն, CNC machining from wrought materials, which already undergo extensive processing to refine grain structures and relieve internal stresses,

tends to result in more stable and predictable residual stress profiles.

Data Point: In aerospace-grade aluminum (7075-T6), residual stresses introduced during CNC machining are typically within ±100 MPa near the surface.

▸ Cast Components

In casting, residual stresses originate from non-uniform solidification մի քանազոր cooling contraction, especially in complex geometries or thick-walled sections.

These thermally induced stresses often extend deeper into the part and are harder to control without additional post-processing.

• Differential cooling rates create tensile stresses in the core մի քանազոր compressive stresses at the surface
• Shrinkage cavities and porosity can act as stress risers
• Residual stress levels depend on mold design, alloy type, and cooling conditions

Data Point: In cast steels, residual stresses can exceed ±200 MPa, especially in large castings that have not undergone stress-relief heat treatment.

Summary Comparison:

Ասպեկտ	CNC-Machined	Cast
Origin of Stress	Cutting forces, localized heating	Thermal contraction during cooling
Depth	Shallow (surface-level)	Deep (volumetric)
Predictability	Բարձր (especially in wrought alloys)	Ցածր (requires stress-relief processes)
Typical Stress Range	±50–100 MPa	±150–200 MPa or more

Անիզոտրոպիա: Directional Properties of Materials

Անիզոտրոպիա refers to the variation of material properties in different directions, which can significantly affect mechanical performance in load-bearing applications.

▸ CNC-Machined (Wrought) Նյութեր

Wrought alloys—used as the base stock for CNC machining—undergo շարժակազմ, արտամղման, կամ կեղծել, resulting in a refined and directionally consistent grain structure.

While some mild anisotropies may exist, the material properties are generally more uniform and predictable across different directions.

• High degree of isotropy in machined parts, especially after multi-axis milling
• More consistent mechanical behavior under complex loading conditions
• Controlled grain flow can enhance properties in the desired direction

Օրինակ: In forged titanium alloy (TI-6AL-4V), the tensile strength varies by less than 10% between longitudinal and transverse directions after CNC machining.

▸ Cast Materials

Ի հակադրություն, cast metals solidify from a molten state, often resulting in directional grain growth մի քանազոր dendritic structures aligned with heat flow.

This causes inherent anisotropy and potential weakness in off-axis loading conditions.

• Greater variability in tensile, հոգնածություն, and impact properties across different directions
• Grain boundary segregation and inclusion alignment further reduce uniformity
• Mechanical properties are less predictable, especially in large or complex castings

Օրինակ: In cast Inconel 718 Տուրբինային շեղբեր, tensile strength can differ by 20-30% between radial and axial orientations due to directional solidification.

7. Surface Integrity and Post‑Processing

Surface integrity and post-processing are essential considerations in determining the long-term performance, Հոգնածության դիմադրություն, and visual quality of manufactured components.

Whether a part is created through CNC հաստոցներ կամ ձուլման, the final surface condition can influence not only aesthetics but also mechanical behavior under service conditions.

This section explores how surface integrity differs between CNC-machined and cast parts, the role of post-processing treatments, and their cumulative impact on functionality.

Surface Finish Comparison

CNC հաստոցներ:

• CNC machining typically produces parts with Գերազանց մակերեսային ավարտներ, especially when fine tool paths and high spindle speeds are used.
• Common surface roughness (Ռա) values for CNC:

• • Standard finish: Ra ≈ 1.6–3.2 µm
  • Precision finish: Ra ≈ 0.4–0.8 µm
  • Ultra-fine finish (Է.Գ., lapping, փայլեցում): Ra ≈ 0.1–0.2 µm

• Smooth surfaces reduce Սթրեսի կոնցենտրատորներ, enhance fatigue life, and improve sealing properties, critical in hydraulic and aerospace applications.

Ձուլում:

• As-cast surfaces are generally rougher and less consistent due to mold texture, metal flow, and solidification characteristics.

• • Ավազի ձուլում: Ra ≈ 6.3–25 µm
  • Ներդրումային ձուլում: Ra ≈ 3.2–6.3 µm
  • Die Casting: Ra ≈ 1.6–3.2 µm

• Rough surfaces can harbor residual sand, սանդղակ, or oxides, which may degrade fatigue and corrosion resistance unless further finished.

Subsurface Integrity and Defects

CNC հաստոցներ:

• Machining from wrought billets often results in խիտ, homogeneous surfaces with low porosity.
• Սակայն, aggressive cutting parameters can introduce:

• • Micro-cracks or heat-affected zones (ՀԱԶ)
  • Residual tensile stresses, which may reduce fatigue life

• Controlled machining and coolant optimization help maintain metallurgical stability.

Ձուլում:

• Cast parts are more susceptible to subsurface defects, ինչպիսիք են:

• • Ծակոտկենություն, gas bubbles, and shrinkage cavities
  • Ներդրումներ (oxides, slag) մի քանազոր segregation zones

• These imperfections can act as initiation sites for cracks under cyclic loads or impact stresses.

Post-Processing Techniques

CNC Machined Parts:

• Depending on functional requirements, CNC parts may undergo additional treatments, ինչպիսիք են:

• • Ապարդյուն – improves corrosion resistance (common in aluminum)
  • Polishing/lapping – enhances dimensional precision and surface finish
  • Կրակոցային պենինգ – introduces beneficial compressive stresses to improve fatigue life
  • Coating/plating (Է.Գ., նիկել, քրոմ, or PVD) – enhances wear resistance

Cast Parts:

• Post-processing is often more extensive due to casting’s inherent surface roughness and internal defects.

• • Surface grinding or machining for dimensional accuracy
  • Hot Isostatic Pressing (HIP) – used to eliminate porosity and increase density, especially for high-performance alloys (Է.Գ., titanium and Inconel castings)
  • Ջերմային բուժում – improves microstructure uniformity and mechanical properties (Է.Գ., T6 for aluminum castings)

Comparative Table – Surface and Post-Processing Metrics

Ասպեկտ	CNC հաստոցներ	Մետաղների ձուլում
Մակերեւույթի կոպտություն (Ռա)	0.2–3.2 µm	1.6–25 µm
Subsurface Defects	Rare, unless over-machined	Common: ծակոտկենություն, ընդգրկումներ
Հոգնածության կատարումը	Բարձր (with proper finishing)	Moderate to low (unless treated)
Typical Post-Processing	Ապարդյուն, փայլեցում, ծածկույթ, կրակոցի պենինգ	Վերամբարձ, HIP, He երմամշակում, հղկող
Surface Integrity	Գերազանց	Փոփոխական, often needs improvement

8. CNC vs. Cast: A Comprehensive Comparison Table

Կարգավիճակ	CNC հաստոցներ	Ձուլում
Manufacturing Method	Subtractive: material is removed from solid billets	Additive: molten metal is poured into a mold and solidified
Material Type	Wrought metals (Է.Գ., 7075 ալյումին, 4140 պողպատ, TI-6AL-4V)	Cast alloys (Է.Գ., A356 aluminum, չուգուն, low alloy cast steels)
Միկրոկառուցվածք	Fine-grain, homogeneous, work-hardened	Dendritic, coarse grain, ծակոտկենություն, potential shrinkage defects
Առաձգական ուժ	Higher (Է.Գ., 7075-T6: ~503 MPa, TI-6AL-4V: ~895 MPa)	Իջնել (Է.Գ., A356-T6: ~275 MPa, grey cast iron: ~200–400 MPa)
Հոգնածության դիմադրություն	Superior due to cleaner microstructure, absence of voids	Lower fatigue life due to porosity and surface roughness
Ազդեցություն & Կոշտություն	Բարձր, especially in ductile alloys like forged steel or titanium	Brittle in many cast irons; variable in cast aluminum or steel
Ծավալային ճշգրտություն	Very high precision (±0.01 mm), suitable for tight-tolerance components	Moderate accuracy (± 0,1-0.3 մմ), depends on process (ավազ < die < Ներդրումների ձուլում)
Մակերեւույթի ավարտը	Հարթ ավարտը (Ra 0.2–0.8 μm), post-processing optional	Rougher as-cast finish (Ra 3–6 μm), often requires secondary machining
Residual Stress	Possible cutting-induced stress, generally mitigated by finishing operations	Solidification and cooling induce residual stresses, possibly leading to warping or cracks
Անիզոտրոպիա	Typically isotropic due to uniform rolled/fabricated billets	Often anisotropic due to directional solidification and grain growth
Դիզայնի ճկունություն	Excellent for complex geometries with undercuts, grooves, and fine details	Best for producing complex hollow or net-shape parts without material waste
Volume Suitability	Ideal for prototyping and low-volume production	Economical for high-volume, low-unit-cost manufacturing
Գործիքների արժեքը	Low initial setup; quick iteration	High upfront tooling/mold cost (especially die or investment casting)
Առաջատար ժամանակ	Fast setup, rapid turnaround	Longer lead times for mold design, approval, and casting execution
Post-Processing Needs	Minimal; optional polishing, ծածկույթ, or hardening	Often required: վերամբարձ, peening, He երմամշակում
Արժեքի արդյունավետություն	Cost-effective in small batches or for precision parts	Economical in large-scale production due to amortized tooling
Դիմումի տեղավորումը	Օդատիենտ, բժշկական, defense, custom prototypes	Ավտոմոբիլային, construction equipment, պոմպեր, փականներ, Շարժիչի բլոկներ
Strength Verdict	Stronger, more consistent – ideal for structural integrity and fatigue-critical components	Weaker in comparison – suitable where strength demands are moderate or cost is a major driver

9. Եզրափակում: Is CNC Stronger Than Cast?

Այո, CNC-machined components are generally stronger than cast parts—particularly in terms of tensile strength, հոգնածության կյանք, and dimensional precision.

This strength advantage arises primarily from the refined microstructure of wrought metals և precision of machining.

Սակայն, the right choice depends on the specific դիմումը, ծավալ, design complexity, եւ բյուջե.

For safety-critical, load-bearing, or fatigue-sensitive components, CNC is the preferred solution.

But for large-scale, geometrically complex parts with less demanding mechanical loads, casting offers unmatched efficiency.

The most innovative manufacturers are now combining both: near-net casting followed by CNC finishing—a hybrid strategy that merges economy with performance in the era of smart, high-performance manufacturing.

Սա is the perfect choice for your manufacturing needs if you need high-quality CNC machining or casting products.

Կապվեք մեզ հետ այսօր!