我厂的主要产品多数是轴承钢(GCr15、GCr6)制零件,如纺锭轴承的外环和锭底(如图1)。这些零件的产量高,质量要求严,须具有良好的金相组织和均匀的硬度。长期以来我厂采用氰盐盐浴加热。此法有剧毒,劳动条件恶劣,生产成本高,有时还因清洗不尽盐及污物而报废。为了改善劳动条件,去除公害,也曾试用过木炭保护气,经过净化后使用, Most of our main products are bearing steel (GCr15, GCr6) parts, such as the outer ring and ingot spindle bearings (Figure 1). The production of these parts is high, the quality requirements are strict, must have a good microstructure and uniform hardness. For a long time I plant salt cyanide bath heating. This method is highly toxic, harsh working conditions, high production costs, and sometimes due to cleaning salt and dirt scrapped. In order to improve working conditions, remove pollution, have also tried charcoal shielding gas, after purification and use,