氮合金化堆焊硬面合金组织与耐高温磨损性能

Microstructure and high-temperature wear-resistance of nitrogen-alloying hardfacing alloy

对马氏体不锈钢堆焊硬面合金进行了氮合金化,研究了其组织和耐高温磨损性能.结果表明,氮合金化马氏体不锈钢堆焊层显微组织主要为马氏体和铌、钛的复合碳氮化物;堆焊马氏体不锈钢硬面合金与碳钢的高温金属间磨损,为碳钢表面高温下形成的氧化皮,粘着于堆焊马氏体不锈钢硬面合金表面,导致堆焊马氏体不锈钢硬面合金产生磨粒磨损.氮合金化堆焊马氏体不锈钢硬面合金铌、钛复合碳氮化物弥散析出,能提高硬面合金的高温硬度值和耐高温磨损性能.

The hardfacing alloy of martensitic stainless steel added nitrogen as alloying element was made,and the microstructure and high-temperature wear-resistance was also studied.It is found that the hardfacing alloy has two main phases of martensite and carbonitrides.The high-temperature wear mechanism between hardfacing alloy of the martensitic stainless steels and the low-carbon steel was abrasive wear because the effect of oxide formation on the surface of the low-carbon steel.The oxide was sticking on the surface of hardfacing alloys and increasing the abrasive wear damage.The results showed that carbonitride particles distributed homogeneously in the hardfacing alloy and had a good strengthening effect on the hardness and high-temperature wear resistance.