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《Journal of Wuyi University(》 1987-02
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The Mechanism of Free-Machining Steel

Chen Chengzhai Wang Lufan Lan jiangyiBeijing Institute of Aeronautics and Astronautics  
One of the obvious characteristics of the calcium treatad free-machining steel we have developed(40 CrCa) is that its machinabi-lity will, in a certain range of cutting speed improve as the cutting speed rises, and will reach the best of it when the cutting speed V = 200m/min. In this case, the tool will be given a life 8 times as long as that when cutting standard steel(40Cr). The reason of the superiority in machinability of this free-machining steel is that as this steel is being machined with titanium-tungsten type cemented carbide tool(YTIS) at high cutting speed, the globular oxide inclusions in the steel will soften and deposit on the surface of the cuting tool as a layer that retards the tool wear.
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【Citations】
Chinese Journal Full-text Database 1 Hits
1 Lou Shenghe Cai Shuqin Zhi Shui(Central Iron & Steel Research Institute)Li Jiefu Jiao Huancai Liu Tienan(Beijing Special Steel Works)Chen Chengzhai(Beijing Institute of Aeronautics & Astronautics);IMPROVMENTS ON MACHINABILITY OF CALCIUM TREATED FREE-MACHINING STEELS[J];Gangtie;1984-07
【Secondary Citations】
Chinese Journal Full-text Database 1 Hits
1 Yang Dong Lu Shanghan(Iron and Steel Department, Ministry of Metallurgical Industry) Zhi Shui(Central Iron and Steel Research Institute, Ministry of Metallurgical Industry);DEVELOPMENT OF POWDER INJECTION TECHNIQUE IN OUR COUNTRY[J];Gangtie;1980-07
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