论文部分内容阅读
一、钼的用途及产销情况钼发现于1778年,但只是在二十世纪才具有工业意义.由于钼能提高钢的机械性能,目前国外80%以上的钼用于钢铁工业,生产高强度合金钢、铁素体和Cr-Mo结构钢等.如加拿大-阿拉斯加-大西洋天然气管道就是用高强度低合金钢制成的.除钢铁工业外,钼主要用于制造超合金及电子工业,钼化合物用作石油工业及化学工业的催化剂、润滑剂和化肥等.我国农业上以钼酸盐作微量化肥也已取得一定效果.含钼的钢在军工、航空、机械、化工、汽车等工业部门也有广泛的应用.例如美国在宇宙飞船上使用镀铬的钼合金,可耐1650℃高温,阿波罗宇宙飞船的燃烧室(温度高达2700℃)和发动机喷嘴就是用镀二硫化钼的钢制造的由于钼具
First, the use of molybdenum and production and marketing of molybdenum found in 1778, but only in the twentieth century was of industrial significance.Because molybdenum can improve the mechanical properties of steel, currently more than 80% of foreign molybdenum used in the steel industry, the production of high-strength alloy Steel, ferrite and Cr-Mo structural steels, etc. For example, the Canadian-Alaska-Atlantic gas pipeline is made of high-strength, low-alloy steel, which is mainly used in the manufacture of superalloy and electronics industry, molybdenum compounds It is used as a catalyst, lubricant and fertilizer for the petroleum industry and chemical industry, etc. Molybdenum has also been used as a trace fertilizer in agriculture in our country. The molybdenum-containing steels have also been used in the military, aviation, machinery, chemical, automobile and other industrial sectors For example, the United States uses chrome-plated molybdenum alloy on a spacecraft that can withstand high temperatures of 1650 ° C, Apollo spacecraft combustion chambers (up to 2700 ° C) and engine nozzles made of molybdenum disulphide-coated steel due to molybdenum With