一种高耐磨铁基堆焊合金的优化设计
Optimizing design of A kind high wear resistance iron base surfacing alloy
杨绍斌，董伟，吴晓光，孙帅
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作者单位：辽宁工程技术大学材料科学与工程学院
中文关键字：铁基合金；耐磨性；优化设计
英文关键字：ferrous alloy; wear resistance; optimizing design
中文摘要：采用L9(34)正交表设计，以铬、钨、钒、稀土四个因素为变量，通过对合金成分的调整，最优化计算，得到优化的铁基耐磨合金。对最佳方案堆焊层组织和性能进行研究，结果表明：最佳配方为A2B3C2D3，成分(质量分数,%)为：10Cr，15W，10V，0.6Re。此合金粉块具有良好的焊接工艺性能，成型性好，其硬度为65HRC。堆焊层与母材有很好的冶金结合，在不预热的情况下，堆焊层未产生裂纹。堆焊层以铁素体和马氏体为主，其上弥散分布着大量碳化物，有良好的韧性、抗裂性和耐磨性。
英文摘要：Using L9 (34 ) orthogonal design, with chromium, tungsten, vanadium and rare earth four factors as the variables, through adjusting the alloy composition and optimizing calculation, the best iron base wear resistant alloy is obtained.On the microstructure and properties research of the optimum surfacing layer scheme, the results show that:the best formula is A2B3C2D3, the components of which are Cr:10%, W:15%, V:10% and rare earth silicon:0.6%. The alloy powder block has a good performance of the welding process, forming a good hardness of HRC65. The surfacing layer and base material has a good metallurgical bonding, without preheating condition and it does not crack. The surfacing layer is mainly with ferrite and martensite, on which there is a large number of carbide. Also it has good toughness, crack resistance and wear resistance.