控制冷却对API2H-50钢正火态组织和性能的影响  

Effect of Controlled Cooling on API 2H-50 Normalized Microstructure and Mechanical Properties

作　　者：程吉浩[1] 陈颜堂[1] 张开广[1] 刘文斌[1] 

机构地区：[1]武汉钢铁(集团)公司研究院,湖北武汉430080

出　　处：《中国材料科技与设备》2015年第3期20-22,共3页Chinese Materials Science Technology & Equipment

摘　　要：摘要：本文研究了不同的轧后控制冷却工艺对API2H-50钢的正火态组织和性能的影响。对3块相同成分的API2H-50钢采取不同的轧后控冷工艺后进行相同的正火处理，检测了钢板1／4厚度处常规力学性能和金相组织，结果表明，API2H-50钢随轧后返红温度的降低，正火后屈服强度和抗拉强度降低，低温韧性影响不明显。随轧后冷却强度的增大，正火后晶粒更粗大，更多的珠光体分布在铁素体晶内，并具有一定的方向性。The paper researched the different controlled cooling on microstructure and mechanical of normalized API 2H- 50. Apply the different cooling rate on 3 block of same chemical compositon API 2H-50 steel after hot rolling. The mechani- cal and mechanical properties of 1/4 plate thickness was detected and observed. The results show that, the tensile strength and yield strength after normalizing was decreased with the self-tempering temperature decreased, but not the low temperature toughness. With the cooling rate increased, the grain size was lager after normalizing, the more pearlite was distributed with some direction in the grain.

关 键 词：API 2H-50 正火 控制冷却 晶粒度 

分 类 号：TG135.1[一般工业技术—材料科学与工程]