过去熔模精密铸造使用的制壳硬化剂是氯化铵。由于熔模精密铸造这一新工艺近年来在各个行业均得到了广泛的采用和推广,从而使得制壳硬化剂——氯化铵的耗用越来越大。氯化铵不但作为一种工业原料被广泛采用,而且是农业的优质化肥,这就造成了与农业争化肥的矛盾,与当前全党动员大办农业普及大寨县的大好形势不相适应。另外,采用氯化铵做硬化剂在制壳中产生大量氨气,不但污染车间作业环境,损害工人身体健康,而且也严重地腐蚀设备。为了解决这些矛盾,沈阳风动工具厂八车间与沈阳铸造研究所协作,发扬“敢于走前人没有走过的道路,敢于攀登前人没有攀登过的高峰”的革命精神,经过不断努力,终于 The shell hardening agent used for investment casting in the past was ammonium chloride. As a new technology of investment casting, it has been widely adopted and promoted in various industries in recent years, which has led to an increase in the consumption of ammonium chloride, the hardening agent for shells. Ammonium chloride is not only widely used as an industrial raw material, but also a good fertilizer for agriculture. This creates a conflict with agriculture and chemical fertilizers, which is incompatible with the excellent situation in which the whole Party mobilizes large-scale agriculture to popularize Dazhai County. In addition, ammonium chloride is used as a hardening agent to generate a large amount of ammonia in the shell, which not only pollutes the working environment of the workshop, impairs the health of the workers, but also seriously corrodes the equipment. In order to resolve these contradictions, the Eight Workshops of Shenyang Wind Tools Factory cooperated with the Shenyang Foundry Institute to carry forward the revolutionary spirit of “daring to walk the path that no one had before, and dared to climb the peaks that no one had previously climbed”. After continuous efforts, it was finally