论文部分内容阅读
我厂锻造的空心涡轮轴在加热过程中报废率较高,主要原因是在加热过程中,40CrNiMoA的轴锻件有严重的表面氧化和脱碳现象,在1200℃保温一小时时,氧化和脱碳深度在1.5～2.0毫米以上。在中国科学院上海硅酸盐研究所大力协助下,我们采用涂料保护方法进行了一系列的试验及试生产,经过两年多的生产实践,证明能达到脱碳深度不超过0.4毫米的要求,取得了较好的效果。一、适应范围我们所采用的202涂料是一种常温的硅酸盐涂层,在锻件加热时能对其表面起保护作
I forged hollow turbine shaft in the heating process scrapped a higher rate, mainly due to the heating process, 40CrNiMoA shaft forgings have a serious surface oxidation and decarbonization at 1200 ℃ insulation for one hour, oxidation and decarburization Depth of 1.5 to 2.0 mm or more. With the help of the Shanghai Institute of Ceramics, Chinese Academy of Sciences, we conducted a series of tests and trial production using the coating protection method. After more than two years of production practice, we have been able to achieve the requirement that the depth of decarburization should not exceed 0.4 mm, A better effect. First, the scope of adaptation We use the 202 coating is a room temperature silicate coating, the surface of the forging heating can be protected