回火温度对SA387Gr5Cl2钢板性能及显微组织的影响  

Effect of Tempering Temperature on Properties and Microstructure of SA387Gr5Cl2 Steel plate

作　　者：牛红星 胡宗鹤 吴艳阳 侯敬超 

机构地区：[1]舞钢钢铁有限责任公司

出　　处：《宽厚板》2017年第6期6-8,共3页Wide and Heavy Plate

摘　　要：通过金相显微镜、扫描电镜及力学试验机研究了回火温度对SA387Gr5Cl2钢板性能和显微组织的影响。结果表明:当SA387Gr5Cl2钢进行Ac3以上70℃正火+不同温度回火时,随着回火温度升高,钢板强度逐渐降低,-40℃和-60℃冲击功保持在较高的水平。SA387Gr5Cl2钢正火后组织为贝氏体,回火过程中产生残留奥氏体分解、碳化物析出及贝氏体铁素体回复现象,在较高温度回火时碳化物聚集长大。Effect of tempering temperature on properties and microstructure of SA387Gr5C12 steel plate is re-searched by 0M,SEM and mechanical testing machine. The results show that the strength gradually decreases,impact values at -40℃ and -60 ℃ remain at higher level with increase of tempering temperature when SA387Gr5C12 steel is normalized at a temperature of 70 XI above Ac3 and tempered at different temperatures. The microstructure of SA387Gr5C12 steel after normalzing comprises of bainite, while the residual austenite decomposes, carbide precipitates and bainite ferrite restore in the process of tempering, carbide aggregates and grows at higher tempering temperature.

关 键 词：SA387Gr5CI2钢板 回火 贝氏体 强度 回复 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG161[金属学及工艺—金属材料]