新型金属基复合模具材料的制备与性能

Preparation and Properties of New-type Metal Matrix Composite Mould Material

在5Cr Mn Mo模具材料中添加了不同含量的纳米钒,并对材料的显微组织、耐磨损性、抗弯性能、高温抗氧化性能进行分析。结果表明,纳米钒的添加可有效细化材料的晶粒,提高耐磨损性能、抗弯性能和高温抗氧化性能。纳米钒的添加量优选为1.0%。与未添加纳米钒的5Cr Mn Mo模具材料相比,添加1.0%纳米钒可使材料25℃磨损体积减小72.7%、250℃磨损体积减小73.5%、500℃磨损体积减小77.6%、25℃抗弯强度增加28.1%、500℃×80 h高温氧化后单位面积质量增重减少89.6%。

The 5CrMnMo mould material was added with different contents of nano-vanadium, and the microstruc^tre, wear resistance, bending resistance and oxidation resistance at high temperature were analyzed. The results show that adding nano-vanadium could markedly refine the grain and improve the wear resistance, bending resistance and oxidation resistance at high temperature of the material. The optimum adding content for nano-V is 1.0%. Compared with the material 5CrMnMo without nano-vanadium, the addition of 1% nano-vanadium could make wear volume at 25℃ decrease by 72.7%, make wear volume at 250℃ decrease by 73.5%, make wear volume at 500℃ decrease by 77.6%, make bending strength at 25℃ increase by 28.1% and make the mass gain per unit area after 500 ℃x 80 h decrease by 89.6%.