以前,我市钢铁件的发黑均采用碱性发黑工艺,将NaOH及NaNO_3按一定配比加热到140℃左右。这样劳动强度和作业条件都很差,影响工人的身体健康,而且消耗大量能源。后来我们了解到无锡职工大学于1983年试验成功了“常温发黑剂”,并已有商品出售。经我们买回来试用效果较好,特别是小批量生产经济效益更为明显,它完全取代煮黑生产所存在的缺点,现已在本市热处理行业逐步推广采用。针对发现的一些具体问题,正在逐步探索改进,以便更好地发挥其威力。 In the past, the city of black iron parts are used alkaline blackening process, NaOH and NaNO_3 according to a certain ratio of heated to about 140 ℃. Labor and working conditions are so poor that they affect the health of workers and consume large amounts of energy. Later, we learned that Wuxi Workers’ College successfully tested “Room Temperature Blackening Agent” in 1983 and has already sold the products. After we buy it back to the trial effect is better, especially in small batch production more obvious economic benefits, it completely replace the shortcomings of cooking black production, is now in the city heat treatment industry gradually promote the use of. In response to some specific problems discovered, improvements are being gradually explored in order to better exert their power.