发明授权
- 专利标题： Cold drawn free-machining resulfurized and rephosphorized steel bars having controlled mechanical properties and controlled machinability
- 专利标题（中）： 冷拔自由加工的再硫化和再磷化钢筋具有受控的机械性能和可控加工性
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申请号： US204308申请日： 1988-06-09
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公开(公告)号： US4880479A公开(公告)日： 1989-11-14
- 发明人: Stephen P. Birman , Richard B. Smith , Richard L. Thompson
- 申请人： Stephen P. Birman , Richard B. Smith , Richard L. Thompson
- 申请人地址： CT Windsor
- 专利权人： Stanadyne, Inc.
- 当前专利权人： Stanadyne, Inc.
- 当前专利权人地址： CT Windsor
- 主分类号： C22C38/12
- IPC分类号： C22C38/12 ; C22C38/60
摘要：
A resulfurized and rephosphorized free-machining steel bar formed by cold drawing a hot rolled steel bar has the composition, by weight, C up to 0.08%; Mn 0.6% to 1.4%; Si up to 0.1%; P at least 0.03%; S 0.25% to 0/50%; Cb 0.02% to 0.10%; the sum of Ni, Cr, Mo and Cu up to 0.15%; balance iron. The ratio of %Mn/%S is from 1.6 to 4.0, and the ratio of [%Mn-(1.62.times.%S)]/%Cb is from 2 to 50. The yield strength of the steel bar is further determined by the draft in cold drawing the bar from the hot rolled state and the size and cross section of the bar after draft. The relationship between strength and ductility is further improved by heavy drafting in cold drawing the bar from the hot rolled state.
公开/授权文献
- US5490448A Beverage brewing machine 公开/授权日：1996-02-13
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