Yihe Auto
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| Attribute | Our Capability and Metric |
|---|---|
| Casting Process | Silica Sol Investment Casting, Lost Wax Process (Medium-Temp Wax). |
| Pattern Material | Medium-Temperature Wax (Higher precision than low temperature wax). |
| Precision Grade | Surface Finish: Ra 1.6- Ra 3.2 μm (AS Cast), CT Grade: CT5 - CT12. Linear Tolerance: ±0.10mm per 25mm, tighter on request. |
| Size Tolerance | Linear Tolerance: +0.10mm per 25mm, (Increase in proportion to size) tighter on request (e.g., ±0.05mm on critical dims). |
| Typical Wall Thickness | Minimum 3mm, Larger than 4 mm is recommended for better filling and integrity. |
| Materials | Stainless Steel (304, 316, 17-4PH), Carbon Steel (ZG45), Alloy Steel (40Cr, 42CrMo), Brass/Bronze (CuZn, AB2). |
| Heat Treatment Type | Quenching & tempering, normalizing, annealing, tempering, solution treatment. |
| Core Making Process | Ceramic Core / Sol-Gel Process (For Complex Internal Channels) |
| Gating System Control | Optimized for Directional Solidification / Minimum Hot Tearing. |
| Microstructure Check | Metallography Analysis / Grain Size Control (For Critical Parts). |
| Max Size / Weight Range | Max Dimension: < 300mm x 300mm x 300mm (Typical). Weight Range: 0.05Kg-25Kg |
| Surface Treatment | Electro-polishing, Passivation, Shot Blasting, Anodizing, Heat Treatment |
| Processing Ability | Precision CNC Machining to 0.05mm, Functional Assembly, 72h DFM Review. Secondary Operation: Tapping, Drilling, Grinding. |
| Application | Pump/Valve Components, Impellers, Marine Hardware, Food/Medical Machinery Parts, Micro Components. |
| Inspection | CMM Inspection, Spectrometry Analysis (COC), Dynamic Balance (≤G6.3), Magnetic Powder (MT). NDT: X-Ray (RT) or Ultrasonic Testing (UT). |
| Inspection Level | AQL or 100% Inspection on Critical Dimensions. |
| Batch Repeatability | High Consistency (Cpk/Ppk data on request). |
| Custom Packaging | Anti-rust Oil Coating, Neutral Labeling, Cleanroom Packaging (for medical/food). |
| Packaging Standard | ISPM15 Certified Wooden Crates, Neutral Labeling, Anti-Corrosion. |
| Standard / Certification | ISO9001, PPAP/COC Supported, ASTM, DIN, JIS Standards. SOP on Request. |
| Lead Time & Service | Sample 5-10 Days, Mass Production 25-30 Days. Tooling/Pattern Cost is deductible from bulk order. |
| Process Type | Process Description | Our Capability & Experience | Typical Materials |
|---|---|---|---|
| Quenching & Tempering | Quench then temper to balance strength and toughness. | Strict temperature & time control; stable hardness 220–300 HB. | 40Cr, 42CrMo, ZG45 |
| Normalizing | Heat and air-cool to refine structure and remove stress. | Used before machining to ensure dimension stability. | Carbon steel |
| Annealing | Heat slowly and cool gradually to reduce hardness. | Applied before machining or reshaping. | ZG35, 304, 316 |
| Solution Treatment | Heat and quick cool to improve corrosion resistance. | Control ±5 °C uniformity; brightness maintained. | 304, 316, 17-4PH |
| Aging Treatment | Medium-temp heating to enhance strength and stability. | 17-4PH parts reach HRC 36–42 after aging. | 17-4PH, Cu-Alloy |
| Material Type | Typical Grade | Our Capability | Typical Application |
|---|---|---|---|
| Carbon Steel | ZG45, Q235, ZG35 | For structural and load-bearing parts; size control within ±0.10mm; cost-effective solution. | Machinery frames, bases, housings |
| Alloy Steel | 40Cr, 42CrMo, ZG40Cr | Wear-resistant and fatigue-resistant; quenching & tempering available; stable dimension control. | Pump valve bodies, pressure housings, drilling tools |
| Stainless Steel | 304, 316, 17-4PH | Corrosion-resistant; mirror polish up to Ra1.6; heat treatment supported. | Food equipment, chemical valves, precision hardware |
| Copper Alloy | CuZn, AB2, Tin Bronze | Wear-resistant and conductive; fine casting surface; plating available. | Hydraulic parts, decorative components, valve seats |
| Item | Medium-Temp Lost Wax | Conventional Lost Wax | Sand Casting |
|---|---|---|---|
| CT Grade | CT5 – CT8 | CT7 – CT9 | CT9 – CT12 |
| Linear Tolerance (per 25mm) | ±0.10 mm | ±0.20 mm | ±0.50 mm |
| Surface Roughness (Ra μm) | Ra 1.6–3.2 | Ra 3.2–6.3 | Ra 12.5–25 |
| Recommended Wall Thickness | ≥3.0 mm | ≥4.0 mm | ≥6.0 mm |
| Repeatability | Excellent — Constant temp & humidity environment ensures dimensional consistency. | Moderate — Precision subject to environmental variations. | Prone to deformation — Significant dimensional instability. |
| Application Focus | Precision components, complex geometries, and surface-finish demanding parts. | General machinery parts | Large, low-cost structural parts |
| Overall Recommendation | Best balance of precision & cost | For general batches | For large rough parts only |
