Cu-Sb添加对回火态9Cr耐蚀钢组织性能的影响  

EFFECT OF Cu-Sb ADDITION ON MICROSTRUCTURE AND PROPERTIES OF TEMPERED 9Cr CORROSION-RESISTANT STEEL

作　　者：陈润农 徐党委 Chen Runnong;Xu Dangwei(Henan Iron and Steel Group Co.,Ltd;Anyang Iron and Steel Group Co.,Ltd;Henan Jinye New Material Science and Technology Co.,Ltd;Institute for Structural Steels,Central Iron&Steel Research Institute Company Limited)

机构地区：[1]河南钢铁集团有限公司,河南郑州450046 [2]安阳钢铁集团有限责任公司 [3]河南省金冶新材料科技有限公司 [4]钢铁研究总院有限公司工程用钢研究院

出　　处：《河南冶金》2024年第5期5-9,48,共6页Henan Metallurgy

摘　　要：利用SEM、物理化学相分析、盐雾腐蚀试验及力学性能测试等方法,研究了Cu-Sb添加对回火态9Cr钢的显微组织、氯离子腐蚀性能以及强韧性的影响。结果表明,回火温度调控9Cr钢耐蚀性的规律为:810℃>730℃>780℃,添加Cu-Sb后满足相同的规律。添加Cu-Sb后回火态9Cr钢的盐雾腐蚀失重明显减小,强度显著提高,塑性略微降低,但730℃回火后发生沿晶断裂,升高回火温度至780℃以上可避开脆性区。The influences of Cu-Sb addition on the microstructure,chloride ion corrosion performance,as well as strength and toughness of tempered 9Cr steel were studied via SEM,physicochemical phase analysis,salt spray corrosion test,and mechanical properties test.The results show that the law of regulating the corrosion resistance of 9Cr steel by tempering is as follows:810℃>730℃>780℃,and the same law is satisfied after adding Cu-Sb.After adding Cu-Sb,the salt spray corrosion weight loss of tempered 9Cr steel is significantly reduced,the strength is significantly increased,and the plasticity is slightly reduced.However,intergranular fracture occurs after tempering at 730℃.Increasing the tempering temperature to above 780℃can avoid the brittle zone.

关 键 词：9Cr耐蚀钢 微观组织 耐蚀性 强韧性 

分 类 号：TG142.7[一般工业技术—材料科学与工程]