精炼处理对低合金双相耐磨钢力学性能的影响

Effect of Refining Treatment on Mechanical Properties of Dual Phase Wear-Resistant Steel

Mn-Si系双相高强度低合金耐磨铸钢在熔炼过程中产生的非金属夹杂物和气体会严重影响耐磨钢的力学性能。采用精炼技术对真空熔炼后的钢液进行精炼处理,并与未经过精炼处理的双相耐磨钢进行了比较研究,发现精炼处理后的试验钢中的氧、氮、硫等有害元素含量大幅降低;非金属夹杂物的形貌变小变圆,数量也有所降低。力学性能测试表明,经过精炼处理后的双相耐磨钢的冲击韧性和延展性获得了大幅提高。

The non-metallic inclusions and gas that formed during the vacuum melting in Mn-Si dual-phase high strength low alloy steel will seriously affect the mechanical properties of wear-resistant steel. The refining treatment of liquid steel after vacuum melting was applied by refining technology. The results show that compared with non-refining treatment dual phase wear resistant steel, the content of oxygen, nitrogen, sulfur and other harmful elements in the test steel reduced sharply after refining treatment; the morphology of non-metallic inclusions become smaller and round, the number has reduce either. And mechanical property test show that the impact toughness and ductility of the dual phase wear-resistant steel was improved greatly after the process of refining.