摘要
高合金钢热冲孔冲头寿命关系到模具与产品成本、生产效率、自动化设备的使用，因此，应注重冲头的选材、材料制备与冲头制造工艺。用3Cr3Mo3VNb作为高合金钢热冲孔冲头，为提高模具寿命，在材料制备上，优化了成分，采用电渣重熔冶炼，减少杂质，毛坯锻造两次，用大锻造比锻造，冲头热处理用真空炉，三次回火．热处理硬度取HRC42～46，冲头表面处理采用镀铬工艺，开展了热冲孔工艺试验。结果表明，用3Cr3Mo3VNb可使冲孔冲头寿命平均达到800件以上。
The punch life of hot punching for high-alloy steel is related to die and product cost, production efficiency, use of auto- matic equipment, therefore the choice of punch material, billet preparation and punch manufacture should be paid attention. 3Cr3Mo3VNb is used in hot punching of high-alloy steel. In order to improve the punch life the punch material composition are opti- mized. Electroslag remehing is used in refining and the impurity is reduced. The billet is forged twice with large forging ratio. Vacuum furnace is used in heat treatment. Temper is conducted three times. The hardness after heat treatment is taken as HRC42 ~ 46. Chrome-plating is used as surface treatment. Hot punching experiment is conducted. It shows that the average life of punch by 3Cr3Mo3VNb is over 800.
出处
《精密成形工程》
2013年第6期20-22,35,共4页
Journal of Netshape Forming Engineering
基金
国防基础科研重点项目(A1020110004)
