Effect of Semi-solid Isothermal Heat Treatment on Microstructure of Cu-Ca Binary Alloy

Chen Qin1; Guo Hongmin1; Yang Xiangjie2; Zhou Longfu2

doi:10.15980/j.tzzz.2012.03.025

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Effect of Semi-solid Isothermal Heat Treatment on Microstructure of Cu-Ca Binary Alloy
Vol. 32, Issue 3, Pages: 243-246(2012)
Published： 2012 ，
DOI： 10.15980/j.tzzz.2012.03.025

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[1]程琴,郭洪民,杨湘杰,周龙富.半固态等温处理对Cu-Ca合金组织的影响[J].特种铸造及有色合金,2012,32(03):243-246.

Chen Qin1, Guo Hongmin1, Yang Xiangjie2, et al. Effect of Semi-solid Isothermal Heat Treatment on Microstructure of Cu-Ca Binary Alloy. [J]. Special Casting & Nonferrous Alloys 32(3):243-246(2012)
[1]程琴,郭洪民,杨湘杰,周龙富.半固态等温处理对Cu-Ca合金组织的影响[J].特种铸造及有色合金,2012,32(03):243-246. DOI： 10.15980/j.tzzz.2012.03.025.

Chen Qin1, Guo Hongmin1, Yang Xiangjie2, et al. Effect of Semi-solid Isothermal Heat Treatment on Microstructure of Cu-Ca Binary Alloy. [J]. Special Casting & Nonferrous Alloys 32(3):243-246(2012) DOI： 10.15980/j.tzzz.2012.03.025.

摘要

通过对比Cu-Ca合金铸态组织

研究了半固态等温处理主要工艺参数对半固态Cu-Ca合金组织的影响

得出了其半固态组织的演变规律。结果表明

在半固态等温处理工艺参数中

影响组织的主要参数为等温温度和保温时间。在一定选择范围内

随着等温温度的升高和保温时间的延长

组织将发生由树枝晶组织到非枝晶组织的一系列转变。研究发现

保温温度为957～967℃

等温时间为45～60min时

合金的球化效果最好

圆整度最高。

Abstract

Effects of different parameters of semi-solid isothermal heat treatment on microstructure of semi-solid Cu-Ca binary alloy were investigated

and through comparatively observing as-cast microstructure

the evolution mechanism of semi-solid microstructure after isothermal heat treatment was presented.The results indicate that the microstructure evolution of semi-solid Cu-Ca alloy after isothermal heat treatment is mainly related to the isothermal temperature and holding time.In a given range

with increasing in the semi-solid isothermal temperature or the holding time

the microstructure is evolved from dendrite into un-dendrite structure.The desirable spherical structure with the best roundness can be observed in the semi-solid Cu-Ca alloy with holding at 957

67 ℃ for 45

0 min.