V-Ti增强相含量对表面改性模具性能的影响

Effect of V-Ti Solid Solution Content on the Properties of Surface Modified Mold

在激光熔敷粉末中添加不同含量的V-Ti固溶体增强相,对3Cr2W8V模具进行了表面改性,并进行了耐磨损性能和热疲劳性能的测试与分析。结果表明,添加V-Ti固溶体增强相有利于提高表面改性模具的耐磨损性能和热疲劳性能;V-Ti固溶体增强相粉末含量优选为15%。与未添加V-Ti固溶体相比,添加15%V-Ti固溶体增强相激光熔敷粉末表面改性3Cr2W8V模具的磨损体积减小63%,热疲劳裂纹级别从7级变为2级。

3Cr2WSV die was surface modified by adding different contents of V-Ti solid solution reinforced phase in the laser cladding powder,and the wear resistance and thermal fatigue properties of the modified die were tested and analyzed. The results show that adding V-Ti solid solution could improve the wear resistance and thermal fatigue properties of the surface modified die. The optimized content of V-Ti solid solution is 15%. Compared with those of the die without V-Ti solid solution in the laser cladding powder,the wear volume of the surface modified die decreases by 63% ,and its thermal fatigue crack level changes from 7 to 2.