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在机械零件的粗加工过程中,不可避免地要花费时间、消耗材料和能源,这样必然会降低企业的经济效益。为了解决这个问题,人们常采用铸造、锻造和粉末冶金等方法得到与成品形状相近的毛坯来减少粗加工过程带来的损失。为了获得所需的组织和性能,在上述成型工艺后还要进行退火处理。对中碳和高碳钢而言,还应该考虑其表面脱碳问题,所以需要采用复碳工艺使其表面的含碳量恢复到原来的水平。为了节约能源和提高生产率,人们采用了低温复碳工艺,把
In the rough machining of mechanical parts, it inevitably takes time, consumes materials and energy, which will inevitably reduce the economic efficiency of enterprises. In order to solve this problem, people often use casting, forging and powder metallurgy and other methods to get the shape of the finished product similar to reduce the rough roughing process losses. In order to obtain the desired microstructure and properties, an annealing treatment is performed after the above forming process. Carbon and high carbon steel, it should also consider the issue of decarburization on the surface, so the need to use complex carbon technology to restore the carbon content of its surface to the original level. In order to save energy and improve productivity, people have adopted a low-temperature carbon-recovery process