新型高锰低镍奥氏体不锈钢性能研究

Study on Properties of New High Manganese and Low Nickel Austenitic Stainless Steel

以传统304奥氏体不锈钢和新型低镍304X奥氏体不锈钢为研究对象,采用力学及腐蚀实验方法,测试研究了304与304X材料在不同温度下的屈服强度、抗拉强度、冲击韧性及室温下的腐蚀速率。试验结果表明:这种以低成本的氮部分代替昂贵镍的新型奥氏体不锈钢具有较高的强度以及优良的室温韧性,但其低温韧性不足;新型奥氏体不锈钢304X具有与304相媲美的耐蚀性及更好的耐晶间腐蚀倾向,这使其在一些高强度以及低温韧性要求不高的工况中具有良好的应用前景。

Taking the traditional 304 Austenitic stainless steel and new 304X Austenitic stainless steel with low nickel content as the research objectives,the yield strength,tensile strength,impact toughness at different temperatures and corrosion rate at room temperature of 304 and 304X were tested by mechanical and corrosion test methods.The results show that the new Austenitic stainless steel with low cost nitrogen partially replacing expensive nickel has high strength and excellent toughness at room temperature,but its low temperature toughness is insufficient.The new Austenitic stainless steel 304X has corrosion resistance comparable to 304 and a better tendency to resist intergranular corrosion.This makes it have a good application prospect in some conditions with high strength and low temperature toughness.