我厂生产的播种机开沟器压簧(圆柱形螺旋弹簧),其外径为36公厘,钢丝直径为4公厘,螺距12公厘,畏348公厘,材料(?)227。以前的热处理方法是830℃淬油,380℃回火15分钟(箱式炉)。现改为快速回火,其热处理工艺为830℃淬油,大约为450℃的铅浴内(铅浴的颜色为蓝色)回火10秒钟,然后空气冷却。经检验结果表明,普通回火与快速回火后两者之弹性大致一样,当加压至56公斤都压缩约152公厘,去掉 The sowing machine opener compression spring (cylindrical helical spring) produced by our factory has an outer diameter of 36 mm, a wire diameter of 4 mm, a pitch of 12 mm and a hardness of 348 mm. The previous heat treatment method is 830 ℃ quenching, tempering at 380 ℃ for 15 minutes (box furnace). Now changed to rapid tempering, the heat treatment process for the 830 ℃ quenching, about 450 ℃ in the lead bath (blue lead bath color) tempering for 10 seconds, then air-cooled. The test results show that ordinary tempering and rapid tempering after both the flexibility of the same, when pressurized to 56 kg are compressed about 152 mm, remove