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俄罗斯中央黑色冶金科学研究所研究了50、30、30和50XH四种钢的热处理对车削后表面粗糙度的影响。试验钢种的化学成分符合4543-71技术条件。毛坯车削加工在标准车床上进行,采用T15K6硬质合金刀具。车削速度为38m/min,主轴转达为2000转/min,切削深度为0.5mm,送进率为0.2mm/转。预先热处理按4种规范进行: 规范Ⅰ:820～900℃完全退火1h,在炉内缓慢冷却到65O℃(V_(冷却)=30℃/h),其后在空气中冷却; 规范Ⅱ:740～770℃不完全退火1h,冷却到650℃(V_(冷却)=30℃/h),其后在空气中冷却; 规范Ⅲ:680～730℃低温退火3h,在空气中冷却;
Russian Central Research Institute of Black Metallurgy studied the 50, 30, 30 and 50XH four kinds of steel heat treatment on the turning surface roughness. The test steel chemical composition in line with 4543-71 technical conditions. Rough turning lathe on the standard lathe, the use of T15K6 carbide cutting tools. Turning speed of 38m / min, spindle transfer of 2000 rev / min, cutting depth of 0.5mm, the rate of feed is 0.2mm / rev. The pre-heat treatment is carried out according to 4 specifications: Specification I: complete annealing at 820-900 ° C for 1 hour, slow cooling to 65 ° C (V_ (cooling) = 30 ° C / h) in the furnace and subsequent cooling in air; Annealed at 680-730 ℃ for 3h, cooled in air; cooled to 650 ℃ (V_ (cooling) = 30 ℃ / h)