合金元素对铁基耐磨堆焊合金性能的影响

采用碳弧堆焊方法成功研制了一种耐磨料磨损铁基堆焊合金,该合金为多元复合强化合金,合金系为Cr-B-Ni-W-V.通过对比堆焊层的平均硬度、磨料磨损试验的磨损失重及微观组织的分析,研究了堆焊合金系统的耐磨料磨损性能.同时系统地讨论了合金元素Cr,B,Ni,W,V对堆焊层金属的组织、硬度和耐磨性的影响规律,从而确定了堆焊合金系统的最佳合金元素含量.结果表明,Cr元素的含量为24.5%～25.5%,B元素的含量为1.30%～1.40 %,W元素的含量为3.9%～4.2%,V元素的含量为3.0%～3.2%时,堆焊合金系的配比适当,堆焊层具有较好的硬度及耐磨性.

Effect of alloy elements on properties of iron-base hardfacing alloy

A kind of iron-base hardfacing alloy for carbon arc welding was developed,which is Cr-B-Ni-W-V poly-elements strengthening alloy system.The paper has studied the performance of grinding wear-resistant by analyzing the average degree of hardness,the abrasion weight loss and microstructure of deposited metal,and discussed the effect of alloy elements on the overlay's structure,degree of hardness and ability of wear-resistant,such as Cr,B,Ni,W,V.The best composition of the alloy system was confirmed.The results show that the mixture ratio of hardfacing alloy is suitable,and the hardness and wearing resistance of overlay is better when Cr content is 24.5%-25.5%,B content is 1.30%-1.40%,W content is 3.9%-4.2%,V content is 3.0%-3.2%.