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我厂热处理车间运用优选法改进热处理工艺,取得了一定成效,情况如下:一、用优选法缩短上柴4110球墨铸铁汽缸套热处理正火时间。原来4110球墨铸铁汽缸套正火工艺是990±10℃,保持四小时,随炉冷却至780℃～820℃,整炉空气冷却。试验的目的,是在保证质量的前提下,提高生产效率,缩短保温时间。根据实际经验990±10℃,保温二小时,白口不能完全消除,因此我们确定在2～4小时之间优选,找合
I plant heat treatment plant to optimize the use of law to improve the heat treatment process and achieved some success, as follows: First, the optimization method to shorten the Chai 4110 ductile iron cylinder liner heat treatment normalizing time. The original 4110 ductile iron cylinder liner normalizing process is 990 ± 10 ℃, for four hours, with the furnace cooled to 780 ℃ ~ 820 ℃, the entire furnace air-cooled. The purpose of the test is to ensure the quality of the premise, improve production efficiency, shorten the holding time. According to the actual experience of 990 ± 10 ℃, two hours incubation, the white can not be completely eliminated, so we determine between 2 to 4 hours to find the best