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大连有色金属铸造厂的革命职工和大连工学院的革命教师,遵照毛主席关于“我们不能走世界各国技术发展的老路,跟在别人后面一步一步地爬行”的教导,经过反复实验,终于试验成功一种751合金。用751合金代替美国SAE328制造发动机活塞,效果良好。751合金的化学成分见表1,与SAE328比较,增加了万分之一的磷,目的是细化晶粒,提高机械性能。
The revolutionary workers of Dalian Nonferrous Metal Foundry and the revolutionary teachers of Dalian Institute of Technology followed the teachings of Chairman Mao on “We can not take the old road to technological development in all countries in the world and follow the step-by-step crawling behind others.” After repeated experiments, we finally succeeded in experimenting A 751 alloy. 751 alloy instead of the United States SAE328 manufacturing engine pistons, the effect is good. 751 alloy chemical composition shown in Table 1, compared with the SAE328, an increase of ten thousandth of phosphorus, the purpose is to refine the grain, improve mechanical properties.