钒含量对拉延模具用半固态含钒灰铸铁性能的影响

对不同钒含量的拉延模具用半固态含钒灰铸铁试样进行了耐磨损性能和热疲劳性能的测试与分析。结果表明:随钒含量从0增加至1.25%,试样的磨损体积先减小后基本不变,热疲劳试验后主裂纹平均深度先减小后增大、平均宽度先减小后基本不变。拉延模具用半固态含钒灰铸铁的钒含量优选为1%。与不添加钒试样相比,钒含量为1%时试样的磨损体积减小72%,热疲劳试验后主裂纹平均深度和宽度分别减小了68%和79%。

Effect of Vanadium Content on Properties of Semi-solid Gray Cast Iron Containing Vanadium for Drawing Dies

The wear resistance and thermal fatigue property of semi-solid gray cast iron samples containing vanadium for drawing dies with different contents of vanadium were tested and analyzed.The results show that with increasing vanadium content from 0 to 1.25％,the wear volume of the sample first decreased and then contained unchanged,the average depth of main crack after thermal fatigue test first decreased and then increased,while the average width of main crack first decreased and then contained unchanged.The optimized content of vanadium in the semi-solid gray cast iron was at 1％.Compared with the sample without vanadium,the wear volume of the sample with vanadium content of 1％ decreased by 72％,and the average depth and width of main crack after thermal fatigue test decreased by 68％ and 79％,respectively.