网络编辑平台

编辑出版

《热加工工艺》编辑部

  地址:陕西兴平市44号信箱

  邮编:713102

  电话:029-38316271 38316274 38316273

  邮箱:rjggy@vip.163.com

企业会员

在线调查

您认为本刊是否有必要建设自己的网络编辑办公平台?

相关下载

友情链接

您所在位置:首页->过刊浏览->2011年第11期(40卷)


Sr+RE在Al-40 wt% Si合金中的复合变质作用
Compound Modification Effect of Sr+RE on Al-40 wt%Si Alloy
胡 威, 李小松, 梁志敏, 郑海燕
点击:1131次 下载:0次
作者单位:(湖南理工学院机械工程学院, 湖南 岳阳 414006)
中文关键字:Sr+RE; 复合变质; Al-40wt%Si; 显微组织; 力学性能
英文关键字:Sr + RE; compound modification; Al-40 wt% Si; microstructure; mechanical properties
中文摘要:研究了Sr+RE复合变质对Al-40wt%Si合金的组织和性能的影响。结果表明,Sr+RE复合变质处理不仅对初晶硅和共晶硅具有变质作用,对枝晶α也有明显的细化作用。当RE加入量保持不变,随着Sr加入量的增加,初晶硅由角块状或大板片状先变为小块状再变为多角的大块状,边、角钝化;共晶硅由针片状变为纤维状加短杆状,最后为密实短杆状,甚至粒状;枝晶α由高度发达的树枝状转变为等轴晶,分布均匀。另外,随Sr加入量的增加,合金力学性能得到显著提高,抗拉强度提高37%,伸长率增加1倍多,硬度提高21%;当Sr加入量为0.05 wt%~0.077 wt%时,组织形貌最理想,综合力学性能最优。
英文摘要:The effects of Sr + RE complex modification on microstructure and mechanical properties of Al-40 wt% Si alloy were investigated. The results show that Sr + RE complex modification not only has modifying effect on primary silicon and eutectic silicon, but also has significant refining effect on dendrite α. When the RE addition remains constant, with the increas of Sr addition, the primary silicon firstly changes from polygonal block or large plate to small block, then to large polygonal block, its edge and corner is passivated; the eutectic silicon changes from needle to fibrous sheet plus short rod, then to dense short rod, or even the granular; the dendrite α changes from highly developed dendritic shape to equiaxed shape and its distribution is uniform. In addition, with the increase of Sr addition, the alloy's mechanical properties significantly improves, its tensile strength is increased by 37%, its elongation is more than double, its hardness is increased by 21%; when the Sr addition is between 0.05 wt% and 0.077 wt%, the microstructure and mechanical properties are best.
读者评论

      读者ID: 密码:    点击此处进行授权 点击此处进行授权
我要评论:
国内统一连续出版物号:61-1133/TG |国内发行代码:52-94 |国际标准出版物号:1001-3814 |国际发行代码:SM8143
主管单位:中国船舶重工集团公司  主办单位:中国船舶重工集团公司热加工工艺研究所中国造船工程学会船舶材料学术委员会
开户银行:工商银行陕西省兴平市板桥支行  帐户名:中国船舶重工集团公司第十二研究所  帐号:2604031909022100458
版权所有©2020热加工工艺》编辑部 陕ICP备08004603号
本系统由北京菲斯特诺科技有限公司设计开发