Tungsten steel lower mold insert is a key component in mold manufacturing. Combined with its material characteristics and application scenarios, the following is a detailed analysis:
**1. Basic concept**
- **Tungsten steel (cemented carbide)**: It is made of sintered metal powders such as tungsten (W), cobalt (Co), with high hardness (HRA 85-93), strong wear resistance, but high brittleness, and is suitable for high stress and high wear environments.
- **Lower mold**: The part of the mold fixed below the press is completed in combination with the upper mold for punching, forming and other processes.
- **Inlet (insert/insert)**: Replaceable parts for embedded mold seats for easy repair and reduce costs.
**2. Core features**
- **High wear resistance**: Extend mold life, especially suitable for large-scale production.
- **High rigidity**: Strong resistance to deformation and ensure molding accuracy.
- **High temperature resistance**: Suitable for high-speed stamping or high-temperature forming environments.
- **Replaceability**: When partial damage is partially damaged, only the inlet needs to be replaced, no overall mold repair is required.
**3. Typical application scenarios**
- **Precision stamping die**: such as punching of electronic connectors and lead frames.
- **Modeling mold**: stretching and bending of automotive parts and hardware.
- **Powder metallurgy mold**: Metal powder molding under high pressure.
- **High wear area**: such as knife edge, guide sleeve, thimble area.
**4. Key points of design and processing**
- **Material selection**:
- Common grades: YG15 (high cobalt, good toughness), YG20 (wear resistance and toughness balance).
- **Processing Technology**:
- **Wire cutting**: Slow-wire travel (accuracy ±0.002mm) to process complex shapes.
- **Grinding and processing**: Precision plane, inner and outer cylindrical grinder ensures dimensions.
- **Avoid impact drilling**: It is prone to cracking and requires laser or electric spark processing.
- **Match tolerance**:
- Interference fit (0.005-0.01mm), or screw fixation to prevent displacement.
- **Surface treatment**:
- TiN/TiCN coating (improve wear resistance), mirror polishing (reduce friction).
**5. Use and Maintenance**
- **Installation**: Clean the mold seat to avoid impurities affecting the cooperation; use a hydraulic press to press it.
- **Luction**: Apply high temperature grease regularly (such as molybdenum disulfide).
- **Monitoring**: Check for blade wear regularly (measurement by tool microscopy).
- **Replacement standard**: Replacement is required when the edge collapse angle is ≥0.05mm or the burr exceeds the standard.
**6. FAQs and Countermeasures**
- **Cracking**:
- **Reasons**: Overload, design stress concentration.
- **Solution**: Optimize the structure (rounded corner transition), reduce stamping speed.
- **Wear too fast**:
- **Reason**: Insufficient hardness of the material or failure of the coating.
- **Solution**: Upgrade to higher cobalt content grades (such as YG8) or add coating.
- **Combination loose**:
- **Reason**: Improper tolerance design or mold seat wear.
- **Solution**: Use low-temperature cold shrink assembly or repair mold seat.
**7. Economic Analysis**
- **Long-term benefits**: The lifespan can reach more than 10 times that of ordinary steel, reducing the downtime and mold replacement time.
- **Applicable scenario suggestions**: Recommended for parts with output of >500,000 pieces/year or high-precision demand.
Dongguan Fengguan Precision Technology Co., Ltd. is located in Changan Town, Dongguan City, which is the main center of Zhuzhou cemented carbide in Dongguan. The main tungsten carbide materials, tungsten steel mold deep processing and all kinds of tungsten steel precision accessories. The cemented carbide series mainly produced and sold are: cemented carbide tungsten steel plate, cemented carbide tungsten steel round rod, cemented carbide tungsten steel strip, cemented carbide tungsten steel round die, diamond tungsten steel, various kinds of cemented carbide tungsten steel non-standard blank, non-magnetic tungsten steel, hard alloy drawing die, tungsten steel pipe shrinking die, tungsten steel pipe drawing die, tungsten steel forming die, tungsten steel punching die, powder metallurgy die, tungsten steel sealing die, Tungsten steel insert sleeve, Tungsten steel extrusion die, Tungsten steel roll, Tungsten steel guide rail, Tungsten steel sealing ring, Tungsten steel punching and shearing die, Tungsten carbide wear-resistant parts, Tungsten wear-resistant steel, Tungsten corrosion-resistant steel, Tungsten steel conductive block, Tungsten steel punch, Tungsten steel bushing, Tungsten steel parts, cemented carbide ball, Tungsten steel milling cutter, diamond blade, Tungsten steel processing, etc. The main products are: Tungsten Steel Stretching Mold，CNC Processing Tungsten Steel Products，Tungsten Steel Die Material，Tungsten Carbide Custom Machining，Tungsten Steel Precision Machined Parts，New Energy Materials Ceramic Aluminium Oxide Zirconia。
Through reasonable material selection, precision processing and standardized maintenance, the mold insert of tungsten steel can significantly improve the mold performance and is suitable for high-precision and large-scale production scenarios. In actual application, costs and benefits need to be weighed based on specific working conditions.
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