• CN:11-2187/TH
  • ISSN:0577-6686

›› 1993, Vol. 29 ›› Issue (3): 36-39.

• 论文 • 上一篇    下一篇

铸态铝黄铜的超塑性

沈焕祥;高世友;苏升贵;高明   

  1. 燕山大学
  • 发布日期:1993-05-01

SUPERPLASTICITY OF CASTING ALUMINUM BRASS

Shen Hunxiang;Gao Hhiyou;Su Shenggui;Gao Ming   

  1. Yanshan University
  • Published:1993-05-01

摘要: 本文 研究了未经任何预处理的大晶粒铸态铝黄铜(ZHA166-6-3-2)的超塑性,结果表明:在变形温度为520~585℃,初始应变速率为2.6×10-4~6.6×10-3s-1范围内,超塑拉伸的伸长率可达到120%以上,最佳应变速率为2.6×10-3s-1,变形温度为575℃,最大伸长率为230%,应变速率敏感性指数为0.32,金相组织分析表明:超薄变形主要发生在大晶粒内部,超塑变形促进亚晶的形成和动态再结晶的进行。

关键词: 超塑性材料, 铝黄铜, 塑性变形

Abstract: This studied the superplasticity in casting large grain aluminum brass (HAL 66-6-3-2) which don’t any pretreatment. A results showed that elongation of 120% more than can obtain at deformation temperature of 520℃ to 560℃ at initial strain rate of 2.6×10-4~6.6×10-3s-1. Maximum elongation of 230% and stain rate sensitivity m- value of 0.32 were obtained under optimum deformation condition at 575℃ at initial at rain rate of 2.6×10-3s-1. Metallographic analysis showed that superplastic deformation occurred mainly in intragranular area. Superplastic deformation promot to produce subgrain in large grain end dynamic recrystallization.

Key words: Aluminum brass, Plastic deformation, Superplasticity material