一九七八年我们试验采用了银锰合金做钻头滑动摩擦付轴承,并已在生产上推广。为了节省我国宝贵的白银,减少外汇,进一步寻找价廉物美、与银锰合金性能相似的其他合金材料,在钻头上代替银锰合金,对今后发展滑动轴承钻头,达到质量好成本低是很有现实意义的。目前美国休斯公司和史密斯公司在6″和81/2″滑动轴承钻头上已用其他价廉物美的合金代替,例如铝铁锰铜合金和铜铁锰合金等。 In 1978, we experimented with using silver-manganese alloy as a slip-on-friction bearing and had been promoted in production. In order to save our precious silver, reduce foreign exchange, to further search for cheap, similar performance with other silver-manganese alloy alloy material, instead of silver-manganese alloy drill bit, for the future development of sliding bearing bits, to achieve good quality and low cost is very good Realistic. Currently, Hughes and the Smith Company in the United States have replaced other inexpensive alloys such as Fe-Mn-Cu alloy and Cu-Fe-Mn alloy on 6 “and 81/2” plain bearings.