石墨易切削钢是顺应易切削钢无铅、低硫这一发展趋势而提出的.具有亚共析组织的钢种其石墨化过程一直很难,因此该钢种开发的关键是促进其石墨化过程.基于增加石墨核心来加速石墨化过程进行了钢种的成分设计与研制.结果表明,正是开发钢中具有与石墨结构(简单六方)相同的BN成为了石墨的形核位置,从而有效促进了开发钢的石墨化过程.开发钢的组织由铁素体和石墨组成,其中,石墨的缺口效应和润滑效果赋予了开发钢较高的切削性能和冷成形性能.
参考文献
[1] | Vaccari J A.Free machining Steels[J].American Machinist and Automated Manufacturing,1986(08):115. |
[2] | 殷瑞钰.钢的质量现代进展(下篇)特殊钢[M].北京:冶金工业出版社,1995:497. |
[3] | Jha G;文凡.易切削钢的发展[J].国外低合金钢、合金钢,1990(02):18. |
[4] | Toshiyuki Murakami;Tetsuo Shiraga .Free Cutting Steel Containing BN Inclusions without Lead Addition[J].NKK技報,2002(178):21-25. |
[5] | Takashi Iwamoto;Toshiyuki Hoshino;Akihiro Marsuzaki et al.A New Developed Unleaded Free Cutting Steel Which Has Both of High Fatigue Strengh and Excellent Machinahility Using Graphitization of Carbon in the Steel[J].Material(Japan),2003,42(02):163. |
[6] | Iwamoto Takashi;Murakami Toshiyuki.Bar and Wire Steels for Gear and Valve of Automobile(Eco-Friendly Free Cutting Steel Without Lead Addition)[J].Technology Report,2004(04):64. |
[7] | 陈日翟.金属切削原理[M].北京:机械工业出版社,1993 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%