论文部分内容阅读
当前金属热处理的发展趋势是[1]: 1.在金属与合金的总产量中,应经热处理部分所占比率不断增加。预计在1975～2000年间,加工工业中需经热处理的钢材的增长率为总钢产量增长率的三倍。1970年全世界钢产量约为六亿吨,预计2000年将增至十七亿五千万吨,为1970年的2.9倍。而需经热处理钢的重量,1970年为六千二百万吨,2000年将增至五亿六千万吨,约为1970年的
The current trend of metal heat treatment is [1]: 1. In the total output of metals and alloys, heat treatment should be part of the proportion of the ever-increasing. It is estimated that between 1975 and 2000, the heat-treated steel in the processing industry will have to grow at a rate that is three times the growth rate of total steel output. Steel production in the world was about 600 million tons in 1970 and is expected to rise to 1,750 million tons in 2000, 2.9 times that of 1970. The weight of steel to be heat-treated rose from 62 million tons in 1970 to 560 million tons in 2000, about 1970