热拉高速钢、热强钢、不锈滚珠钢及电阻合金等难变形钢丝的生产在国外已有成熟的工艺,它较我国目前采用的冷拉法有显著的经济效果。例如(?)2.4mm的95Cr18M_0不锈滚珠钢丝,其冷拉工艺是8.1~*—7.0~*—6.0~*—5.5—5.0~*—4.4~*—4.0~*—3.5—3.2~*—2.8—2.4mm,热处理次数为6次,而热拉法如表1所示,根据加热方法的不同,热处理次数分别为5、4和0次。因而 Hot-drawn high-speed steel, hot-rolled steel, stainless steel balls and resistance alloy steel and other difficult deformation of the production of mature technology in foreign countries, it is currently used in China’s cold-drawing method has a significant economic effect. For example, the 2.4mm 95Cr18M_0 stainless steel ball wire has a cold drawing process of 8.1 ~ * -7.0 ~ * -6.0 ~ * -5.5-5.0 ~ * -4.4 ~ * -4.0 ~ * -3.5-3.2 ~ * - 2.8-2.4mm, the number of heat treatment 6 times, and the hot pull method shown in Table 1, depending on the heating method, the number of heat treatment were 5,4 and 0 times. thus