• CN:11-2187/TH
  • ISSN:0577-6686

›› 1989, Vol. 25 ›› Issue (3): 66-71.

• 论文 • 上一篇    下一篇

水平连续铸造球墨铸铁塑性变形的研究

李超荣;梁吉;吴德海;王贻青;陆文华   

  1. 清华大学;陕西机械学院;西安交通大学
  • 发布日期:1989-06-01

THE PLASTIC DEFORMATION OF CONTINUOUS CASTING DUCTILE IRON

Li Chaorong;Liang jie;Wu Dehai;Wang Yiqing;Lu Wenghua   

  1. Tsinghua University Shaanxi Mechanical College Xian Jiaotong University
  • Published:1989-06-01

摘要: 本文研究了不同成分的砂型铸造和水平连续铸造球铁棒材的塑性性能。结果得出,对于普通成分的球铁,铸造方式对压缩变形率影响不大,但对合金球铁,连续铸造棒材的高温塑性要优于砂型铸造。连续铸造棒材可以自由锻造成各种形状,可以模锻成球。可利用锻造后的余热进行热处理,经盐浴等温后,可达σ b=1420MPa,δ=8.7%,α K=118J/cm2的优异综合性能。连续铸造棒材的成分偏析小。锻压后,内部的石墨变成条状;铁素体沿石墨分布呈相应条状,并且数量增多。

关键词: 连续铸造, 球铁, 塑性变形

Abstract: The plastic properties of different composition ductile iron bars which were prepared by continuous casting and sand casting have been investigated. The maximum reduction of unalloyed ductile iron has little difference between continuous casting bar and sand casting bar. The plastic properties of continuous casting bars in high temperature are much, better than that of sand casting bar for alloyed ductile iron. The continuous casting ductile iron bar can be changed into different shapes by free forging and can be formed in to spherical shape by die forging. The properties of die forging ball can be as high as tensile strength 1420N /mm2, elongation 8.7% and impact value 118J/em2 when it is direct austemped. The segregation of continuous casting bar is less than that of sand casting bar. The nodular graphite has changed into stripe form, and the shape of ferritic structure has also been changed along the graphite and its amount has increased

Key words: 连续铸造, 球铁, 塑性变形