钙硫比对18CrNiMo7-6钢中硫化物热变形性能的影响
Effect of Ratio of Calcium to Sulfur on Hot Deformability of Sulfide in 18CrNiMo7-6 Steel
摘 要
采用光学显微镜、扫描电镜及能谱仪等方法研究了钙处理后18CrNiMo7-6齿轮钢中钙硫比对硫化物热变形性能的影响.结果表明:钙硫比在0.019~0.068范围内时,钢中的硫化物主要由单相硫化物和氧硫复合夹杂物组成,复合夹杂物的含量与钙硫比存在正比线性关系;整体硫化物的相对塑性与钙硫比呈线性递减关系,钙硫比主要通过影响氧硫复合夹杂物的相对比例和成分来影响整体硫化物的相对塑性.
钙处理
硫化物
相对塑性
gear steel
calcium-treatment
sulfide
relative plasticity
Abstract
The effect of ratio of calcium to sulfur on hot deformability of sulfides in the gear steel 18CrNiMo7-6 after calcium-treatment was investigated by means of optical microscope,scanning electron microscope and electron spectrometer.The results show that the sulfides were composed of single phase sulfide and oxide-sulfide duplex inclusions in steels when the ratio was between 0.019 and 0.068.The content of the compound inclusions correlated proportionally with the ratio of the steel,and the relative plasticity of all sulfides decreased linearly with the ratio.The relative fraction and composition of oxide-sulfide compound inclusions which were influenced by the ratio played a major role in relative plasticity for all sulfides.
中图分类号 TG142.41
所属栏目 试验研究
基金项目
收稿日期 2009/10/21
修改稿日期 2010/6/5
网络出版日期
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备注肖国华(1974-),男,湖南衡阳人,博士研究生.
引用该论文: XIAO Guo-hua,DONG Han,WANG Mao-qiu,HUI Wei-jun. Effect of Ratio of Calcium to Sulfur on Hot Deformability of Sulfide in 18CrNiMo7-6 Steel[J]. Materials for mechancial engineering, 2010, 34(11): 14～17
肖国华,董瀚,王毛球,惠卫军. 钙硫比对18CrNiMo7-6钢中硫化物热变形性能的影响[J]. 机械工程材料, 2010, 34(11): 14～17
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【4】松井直樹,渡里宏二.Ca添加機械構造用鋼の切削における超硬工具摩耗抑制効果[J].鉄と鋼,2005,91(8):639-646.
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【6】小军指夫.硫化物系介在物と構造用鋼の延性および靱性[J].鉄と鋼,1975,61(14):2998-3021.
【7】TOMITA Y.Effect of desulphurization and calcium treatments on the inclusion morphology of 0.4C-Cr-Mo-Ni steel[J].J Mater Sci,1994,29(11):2873-2878.
【8】DAVIS J R.Gear materials,properties and manufacture[M].Ohio:ASM International,2005:44-45.
【9】ASTM E768-99(2004) Standard guide for preparing and evaluating specimens for automatic inclusion assessment of steel[S].
【10】MAINY D.Morphological and analytical characterization of inclusions relation with processing parameters and properties of use[J].Materials Characterization,1996,36(4/5):321-326.
【11】MALKIDWICZ T,RUNNIK S.Deformation of non-metallic inclusions during rolling of steel[J].J Iron Steel Inst,1963,201(1):33-38.
【12】YAGUCHI H.Manganese sulfide inclusions in low-carbon resulfurized free-machining steels[C]//31st Mechanical Working and Steel Processing Proceedings.Chicago:Iron and Steel Society USA,1989:3-12.
【13】KIESSLING R,LANGE N.Non-metallic inclusions in steel[M].London:The Metal Society,1978:66.
【14】SALTER W J M,PICKERING F B.Composition and constitution of nonmetallic inclusions in 1%.C-Cr steels[J].J Iron Steel Inst,1969,207(7):992-1002.
【15】FARRELL J W,HILTY D C.Modification of inclusions by calcium[J].Iron Steelmaker,1975,2(5):17-22.
【16】LEUNG C H,VAN VLAVK L H.Solution and precipitation hardening in (Ca,Mn) sulfides and selenides[J].Metall Trans A,1981,12(6):987-991.
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