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激光技术发展很快,高能连续波CO_2气体激光器的问世更促进了激光技术的使用。工业上,金属加工方面的应用亦是如此。激光应用于切割,钻孔,焊接早就为人们所掌握。70年代激光技术又应用到金属热处理方面,用以改善金属表面的特性。激光在金属加工上主要用作为热源。激光热处理顾名思义即是取其“热”,不过所需的功率密度,扫描速度与焊接,切割,钻孔等不同而已。利用激光热源使金属表面的温度超过金属的临界点使金属相变硬化,这种方法在生产上已经比较成熟。例如美国通用汽车公司的操纵齿轮轴承座,1956年以来一直使用ASTM-A47-32570铸铁,硬度为HB130～170,1970年因油压从700磅/时~2提高到
The rapid development of laser technology, the advent of high-energy continuous wave CO2 gas lasers also promoted the use of laser technology. In industry, the same applies to metalworking. Laser used in cutting, drilling, welding has long been known for people. 70s laser technology is applied to the metal heat treatment, to improve the characteristics of the metal surface. Laser is mainly used as a heat source in metal processing. Laser heat treatment, as the name implies, takes its “heat,” but the required power density, scanning speed and welding, cutting, drilling and other different only. The use of laser heat source so that the metal surface temperature exceeds the critical point of the metal so that the metal phase hardening, this method has been more mature in production. For example, the United States General Motors steering gear housing has been using ASTM-A47-32570 cast iron since 1956, the hardness of HB130 ~ 170, 1970 due to hydraulic pressure from 700 pounds / h ~ 2 to