新型马氏体耐磨钢的磨损特性研究

Study on the wear characteristics of new type martensite wear resistant steel

对自行研制的新型马氏体耐磨钢ADVANS 450W进行了900℃×0.5h油淬+300℃×2h回火处理,在MLD-10型动载磨料磨损实验机上,研究了ADVANS 450W钢在棕刚玉磨料下的冲击磨料磨损特性,并用X衍射分析仪测定了试验前后ADVANS 450W钢残余奥氏体量的变化,用扫描电镜(SEM)分析了磨损机理。结果表明:热处理后ADVANS 450W钢获得了较高的硬度,强韧性配比理想;在棕刚玉磨料下,磨损失重量随时间延长基本呈线性增长,冲击能量增加,失重量增大,磨损机理稳定,均以显微犁削为主。

The self-developed new type martensitic wear resistant steel ADVANS 450W is heated to 900℃ austenitizing for 30 minutes, then oil quenched and tempered at 300 ℃for 2 hours. The impact abrasive wear characteristics of steel ADVANS 450W are investigated on MLD-IO type impact abrasive wear tester under brown corundum abrasive. The volume fraction of retained austenite in the wear surface of steel ADVANS 450W is measured by using X-ray diffraction before and after wear test, the wear mechanism is analyzed by scanning electron microscope （SEM）. As a result, a high hardness and a good matching of strength and toughness are able to achieve in steel ADVANS 450W after heat treatment. Under brown corundum abrasive, weight loss appears linear growth with time prolonged, and weight loss is increasing with impact energy increasing, and the primary wear mechanisms are stable, which are micro-ploughing and micro-cutting.