等温温度对9SiCr热轧钢板球化退火组织和硬度的影响  

Effect of Isothermal Temperature on Microstructure and Hardness of 9Si Cr Hot Rolled Steel Plate after Spheroidizing Annealing

作　　者：甘晓龙[1] 蔡珍[1] 汪水泽[1] 朱万军[1] 孙宜强[1] GAN Xiaolong CAI Zhen WANG Shuize ZHU Wanjun SUN Yiqiang(Research and Development Center of Wuhan Iron and Steel （Group） Corp, Wuhan 430080, Chin)

机构地区：[1]武汉钢铁(集团)公司研究院,湖北武汉430080

出　　处：《热加工工艺》2017年第20期233-235,共3页Hot Working Technology

摘　　要：对9Si Cr热轧钢板进行了4种不同工艺的等温球化退火试验,研究了等温温度对钢板球化组织和硬度的影响。结果表明,等温温度过高或过低,都不利于碳化物的球化,等温温度为720℃时,退火后组织中片状珠光体消失,细小的球状碳化物均匀分布在铁素体基体上,且硬度最低。9Si Cr热轧钢板的等温球化退火温度应是720℃。Isothermal spheroidizing annealing experiments of four different processes for 9SiCr hot rolled steel plate were carried out. The effects of isothermal temperature on spheroidized microstructure and hardness of steel plate were studied. The results show that too high or too low isothermal temperature is unfavorable for spheroidization of the carbide. When the isothermal temperature is 720℃, the lamellar pearlite disappears after annealing, the fine spherical carbide particles are distributed evenly on the ferrite matrix, and the hardness is minimum. The isothermal annealing temperature of 9SiCr hot rolled steel plate should be 720 ℃.

关 键 词：9SICR钢 等温球化退火 等温温度 碳化物 

分 类 号：TG156.2[金属学及工艺—热处理]