亚共析钢中厚壁无缝管水-空循环冷却的正火组织与性能控制  

A Water-Air Circulation Cooling Process Used for Normalizing Structure and Performance Control of Hypoeutectoid Steel Medium-and Thick-Walled Seamless Steel Pipes

作　　者：杨煌光 姚火能 杨玲 杜坤 张洋波 Yang Huangguang;Yao Huoneng;Yang Ling;Du Kun;Zhang Yangbo(Daye Special Steel Co Ltd,Huangshi 435001;Hubei Huangshi Product Quality Supervision and Inspection Institute,Huangshi 435000;Hubei Province Key Laboratory for High Quality Special Steel,Huangshi 435001)

机构地区：[1]大冶特殊钢有限公司,黄石435001 [2]高品质特殊钢湖北省重点实验室,黄石435000 [3]湖北省黄石市产品质量监督检验所,黄石435001

出　　处：《特殊钢》2021年第3期47-51,共5页Special Steel

摘　　要：研究亚共析钢中厚壁(壁厚≥30 mm)无缝钢管正火冷却速度和同一截面的冷却均匀性,将水-空循环冷却模型用于中碳和低碳Mn钢中厚壁无缝钢管正火组织及性能控制过程。通过分析风冷、水雾强制冷却和水-空循环冷却的钢管正火组织和性能,采用"钢管部分浸入水面+高速旋转"的水-空循环冷却方式,即通过控制浸入深度、钢管旋转速度、冷却总时间,最终获得在铁素体+珠光体稳定组织的基础上,中厚壁钢管屈服强度≥500 MPa、-20℃V型冲击功≥100 J的性能。In order to study the normalizing cooling rate and the cooling uniformity of hypoeutectoid steel medium-and thick-walled seamless steel tube with wall thickness≥30 mm,the water-air circulation cooling model is used for the normalizing structure and performance control of medium-and low-carbon Mn steel medium-and thick-walled seamless tube.Based on analysis on struture and properties of normalized steel tube with fan cooling,water fog forced cooling and water-air ciculation cooling,the water-air circulation cooling process-immersing part of the steel pipe body in water and high speed rotating meanwhile,and controlling the depth of immersion,the rotation speed of steel tube and the total cooling time,of medium-and thick-walled pipe,the performance of yield strength≥500 MPa,-20℃V-type impact energy≥100 J based on the stable structure of ferrite+pearlite are obtained.

关 键 词：正火 冷却速度 水-空循环 中、低碳Mn钢无缝管 

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]