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传统的高速钢回火工艺是三次回火。我根据国外有关资料的介绍试验了两次回火工艺,现将试验情况介绍如下。一、试验工艺及设备 1.试验工艺,第一次回火温度为580℃、时间1.5小时;第二次回火温度为560℃、时间1小时。每次到时间后取出空冷至室温。 2.采用φ12毫米的W6Mo5Cr4V2钻头为试样,用销盐炉回火。二、试验结果采用新工艺回火后硬度为HRC65,回火程度按原一机部回火组织标准为
Traditional high-speed steel tempering process is three times the tempering. According to the introduction of foreign information I tested twice tempering process, the test situation are as follows. First, the test process and equipment 1. Test process, the first tempering temperature of 580 ℃, time 1.5 hours; the second tempering temperature of 560 ℃, time 1 hour. Remove air-cooled to room temperature after each time. 2. Using φ12 mm W6Mo5Cr4V2 bit as a sample, tempering with salt sales furnace. Second, the test results The hardness of the new technology after tempering HRC65, tempering degree according to the original machine tempering organization standard