热处理工艺对S890高强度无缝钢管组织与性能的影响  

EFFECT OF HEAT TREATMENT ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF S890 HIGH STRENGTH SEAMLESS STEEL TUBE

作　　者：张海峰[1] 张恒华[1] 吴晓春[1] 许珞萍[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《上海金属》2014年第4期30-33,共4页Shanghai Metals

摘　　要：起重机臂架是履带式起重机的关键部件,具有高强度、高塑性、良好的韧性和焊接性能,目前我国起重机臂架用高强度钢管主要依赖进口。以S890热轧无缝钢管为研究对象,分析加热温度对原始奥氏体晶粒尺寸和淬火硬度的影响,以及回火温度对组织和硬度的影响,最后确定调质工艺为:加热温度(930±20)℃,回火温度(620±10)℃。调质处理后材料的性能满足使用要求,并且具有大的屈强比,高的横纵比。Crane boom is a key part of crawler crane, with high strength, high plasticity, good toughness and weldability. But at present high strength seamless steel tube for crane boom mainly relies on import in our country. As the object of study, S890 hot rolling seamless steel tube was investigated. After analyzing the influence of heating temperature on the original austenite grains and quenching hardness as well as the effect of tempering temperature on microstructure and hardness, the quenching and tempering process was determined as follows： heating temperature was （930 ± 20）℃, tempering temperature was （620 ± 10）℃. Material performance after treatment fully met the requirements and also had high yield ratio and high impact properties of the transverse and longitudinal ratio.

关 键 词：S890高强度无缝钢管 热处理工艺 组织 力学性能 

分 类 号：TG335.71[金属学及工艺—金属压力加工]