铝、钛、钨对ZG40Cr25Ni20抗磨耐热钢性能的影响

Effect of Aluminum,Titanium and Tungsten on Properties of ZG40Cr25Ni20 Wear-resistant and Heat-resistant Steel

对添加不同质量分数Al、Ti、W的ZG40Gr25Ni20钢室温及高温性能进行测定,分析合金元素对钢性能的影响。结果表明:合金元素的加入使得ZG40Gr25Ni20室温抗拉强度有所升高,延伸率下降,表现为脆性断裂,但是高温时延伸率显著提高,拉伸断口存在较多的韧窝及撕裂棱等,材料表现出较好的高温韧性。同时,合金元素的加入使得试验钢在900、1000℃下属于完全抗氧化,在1100℃下属于抗氧化。另外,Al、Ti、W元素的加入可提高材料硬度,使其在室温及600℃干摩擦情况下的耐磨性均有所提高。

The room temperature and high temperature properties of ZG40Cr25Ni20 steel added with different mass fractions of Al,Ti and W were tested.The effects of alloy elements on the properties of steel were analyzed.The results show that with the addition of alloying elements,the room temperature tensile strength increases and the elongation decreases,in brittle fracture.However,the elongation increases significantly at high temperature,and there are many dimples and tear edges in the tensile fracture,so the material shows better high temperature toughness.At the same time,the addition of alloying elements makes the test steel completely oxidation-resistance at 900 ℃ and 1000 ℃,oxidation-resistance at 1100 ℃.In addition,the addition of Al,Ti and W elements improve the hardness of the material and improve its wear resistance at room temperature and 600 ℃ dry friction.