一、引言高速工具钢丝的生产在我国已有二十多年的历史,其中尤以W系高速工具钢丝的发展为最早,并且长期居于统治地位。这种状况一直持续到一九七九年才开始有所变化,W—M_o系高速工具钢丝逐步发展起来,而且产品比重直线上升,甚至远远超过了W系高速工具钢丝的产量,这是由于我国工具行业产品结构及其工艺发生变化所促成的。六 I. INTRODUCTION The production of high-speed tool steel wire has been in our country for more than 20 years, especially the development of W-type high-speed tool steel wire as the earliest, and has long been in a dominant position. This situation did not begin to change until 1979. The W-M_o high-speed tool steel wire gradually developed and the product proportion rose linearly and even far exceeded the output of the W-series high-speed tool steel wire due to China’s tool industry product structure and process changes resulting from. six