SWRH82B高碳钢热轧盘条心部组织控制  

Control of core microstructure in hot rolled SWRH82B high carbon steel wire rod

作　　者：王金涛 沈奎 李战卫 张宇 Wang Jintao;Shen Kui;Li Zhanwei;Zhang Yu(Institute of Research of Iron&Steel,Shasteel,Zhangjiagang Jiangsu 215625,China)

机构地区：[1]江苏省(沙钢)钢铁研究院,江苏张家港215625

出　　处：《金属热处理》2024年第3期103-107,共5页Heat Treatment of Metals

摘　　要：研究了不同吐丝温度以及不同水箱水量分布高-中-低、高-低-高对SWRH82B高碳钢盘条组织和性能的影响。结果表明,将吐丝温度提高到910±10℃,水箱水量按高-低-高分布使盘条的心表温差由18℃提升到30℃,提高心部冷却速度,降低网状渗碳体的产生,使网状渗碳体检出率由70%降低至5%,网状渗碳体级别由E级降为C级,盘条1/4直径位置处索氏体片层间距由153 nm降为138 nm,盘条的抗拉强度由1174 MPa提高至1187 MPa,从φ6.5 mm到φ2.1 mm的连续拉拔断丝率由9次/100 t降至1次/100 t,有效改善了热轧盘条的拉拔性能。Effects of different spinning temperatures and different water tank water amount distributions(high-medium-low,high-low-high)on the microstructure and properties of SWRH82B high carbon steel wire rod were investigated.The results show that when the spinning temperature is increased to 910±10℃and the water in the water tank is distributed according to high-low-high,the temperature difference between the core and the surface of the wire rod increases from 18℃to 30℃,the cooling rate of the core of the wire rod is improved,the formation of network cementite is reduced,the detection rate of network cementite is reduced from 70%to 5%,and the grade of network cementite is reduced from grade E to grade C.At the position of 1/4 diameter of wire rod,the lamellar spacing of the sorbite decreases from 153 nm to 138 nm,and the tensile strength of wire rod increases from 1174 MPa to 1187 MPa.For continuous drawing the rod from φ6.5 mm to φ2.1 mm,the breaking rate is reduced from 9 times/100 t to 1 time/100 t,which effectively improves the drawing performance of hot rolled wire rod.

关 键 词：高碳钢 盘条 网状渗碳体 轧制工艺 拉拔性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]