固溶处理对电弧增材制造超级双相不锈钢微观组织及摩擦磨损性能的影响

Effect of Solution Treatment on Microstructure and Wear Resistance of Directed Energy Deposited Super Duplex Stainless Steel

采用直径为1.2 mm的ER2594-超级双相不锈钢焊丝进行了多层单道墙体电弧增材试验,对增材件分别进行1050、1150和1250℃的固溶处理,并在固溶处理后对各试样进行了往复式摩擦磨损试验.试验结果表明:随着固溶温度的升高,双相比中的铁素体含量增加,其显微硬度也相应提高.此外,固溶处理可降低增材件的内应力,最终基于较高硬度和较低内应力的协同作用,在1250℃时获得耐磨性能较优的试样,有效地提升了热处理后增材件试样的摩擦磨损性能.

A multi-layer single-pass wall deposition experiment was conducted using ER2594 super duplex stainless steel welding wire with a diameter of 1.2 mm.The additively manufactured specimens were subjected to solution treatment at temperatures of 1050,1150 and 1250℃,followed by reciprocating friction and wear tests.The experimental results revealed that with the increase in solution treatment temperature,the ferrite content in the duplex phase increased,leading to a corresponding increase in microhardness.Furthermore,the solution treatment effectively reduced the internal stresses in the additively manufactured components.Ultimately,based on the synergistic effect of higher hardness and lower internal stresses,the specimen treated at 1250℃exhibited superior wear resistance in the friction and wear tests.The wear resistance of the samples after heat treatment were effectively improved.In summary,the findings of this study highlighted the importance of solution treatment temperature in determining the microstructural and mechanical properties of additively manufactured super duplex stainless steel components.By optimizing the solution treatment conditions,it was possible to improve the wear resistance of these components,thereby enhancing their overall performance in various applications.