ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2016, Vol. 37 ›› Issue (2): 1-3.

• 试验研究 •    下一篇

新型易切削不锈钢TBPS中MnS夹杂相对热塑性的试验研究

罗刚,王辉绵   

  1. 太原钢铁(集团)有限公司先进不锈钢材料国家重点实验室,太原 030003
  • 收稿日期:2015-10-15 出版日期:2016-04-01 发布日期:2022-08-05
  • 作者简介:罗刚(1980-),男,博士(2011年中科院金属所),工程师,2003年东北大学(本科)毕业,易切削、高强度经济型等不锈钢研究。
  • 基金资助:
    国家科技支撑计划项目资助(2011BAE31B00)

Test and Study on Relative Hot Plasticity of MnS Inclusion in a New Free-Cutting Stainless Steel TBPS

Luo Gang , Wang Huimian   

  1. State Key Laboratory of Advanced Stainless Steel, Taiyuan Iron and Steel Group Co Ltd, Taiyuan 030003
  • Received:2015-10-15 Published:2016-04-01 Online:2022-08-05

摘要: 试验易切削不锈钢TBPS(/%:0.02C,0.75Si,1.50Mn,0.008 P,0.21S,19.70Cr,1.10Mo,0.11Pb,0.008Te)由真空感应炉+电渣重熔(Φ350 mm,500kg锭)冶炼,用Gleeble 3800热模拟机试验研究900~1200℃、变形量10%~70%时电渣锭中MnS夹杂的相对热塑性。结果表明,在900~1100℃时,随着变形量的增加,MnS夹杂的相对变形指数γ变小;在1200℃,变形量对MnS央杂相对变形指数γ影响较小;且随着变形温度升高,MnS夹杂的相对变形指数γ减小,特别在1200℃,相对变形指数γ显著减小;为降低MnS延展变形以获得较好的易切削性能,TBPS宜采用高的温度和大的道次变形量进行热变形。

关键词: 易切削不锈钢TBPS, 硫化锰夹杂, 相对热塑性, 温度, 变形量

Abstract: The test free-cutting stainless steel TBPS (/% : 0.02C, 0.75Si, 1.50Mn, 0.008P, 0.21S, 19.70Cr, 1.10Mo, 0.llPb, 0.008Te) is melted by vacuum induction furnace + electro-slag remelting (ESR)(Φ350 mm, 500 kg ingot) , and the relative hot plasticity of MnS inclusion in ESR ingot with deformation 10%-70% at 900-1200 °C has been tested and studied by Thermomechanical Simulator Gleeble 3800. The results show that at 900-1100 ℃ with increasing deformation the relative plasticity index γ of MnS inclusion decreases ; at 1200 °C the effect of deformation on the relative plasticity index γ of MnS inclusion is minor ; and with increasing the deformation temperature, the relative plasticity index γ of MnS trends towards decreasing, especially at 1200℃; the relative plasticity index γ decreases obviously. In order to decrease the elongation deformation of MnS to get better free-cutting performance, it available for steel TBPS to hot deform by larger pass deformation at higher temperature.

Key words: Free-Cutting Stainless Steel TBPS, MnS Inclusion, Relative Hot Plasticity, Temperature, Deformation