Study on the machinability of resulfurized composite free-cutting steels |
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| Authors: | D. Lou K. Cui Y. Jia |
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| Affiliation: | (1) Department of Materials Science and Engineering, Huazhong University of Science and Technology, 430074 Wuhan, P.R. China |
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| Abstract: | The machinability of S, S-Ca, S-RE, and S-RE-Ca system resulfurized composite free-cutting steels were investigated, where RE is rare earths, mostly cerium. The experimental results showed that in the low cutting speed range (≤35 m/min), the S-RE system free-cutting steel had better machinability than the others and that the S-RE-Ca system free-cutting steel exhibited the best machinability at high cutting speeds. A protective layer capable of preventing diffusion wear was formed on the rake face of a P30 tool when S-RE-Ca system free-cutting steel was machined in the cutting speed range of 120 to 160 m/min. |
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| Keywords: | free-cutting steel machinability protective layer resulfured composite system |
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