Comparative Study on the Structure Evolution of ZL109 Alloy and 7050 Alloy in the Semisolid Forging Process

翟彦博; 刘昌明; 王开; 韩兆堂

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Comparative Study on the Structure Evolution of ZL109 Alloy and 7050 Alloy in the Semisolid Forging Process
Issue S1, Pages: 439-443(2007)
Published：2007
DOI：
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[1]翟彦博,刘昌明,王开,韩兆堂.铸造ZL109铝合金和变形7050铝合金半固态成形过程组织演变的对比研究[J].特种铸造及有色合金,2007(S1):439-443. DOI：

翟彦博, 刘昌明, 王开, et al. Comparative Study on the Structure Evolution of ZL109 Alloy and 7050 Alloy in the Semisolid Forging Process[J]. Special Casting & Nonferrous Alloys, 2007, (S1): 439-443. DOI：

摘要

对比研究了铸造109铝合金和变形7050铝合金在低过热法制备原始坯料、二次重熔、半固态锻造成形和热处理过程中组织演变特点。用低过热法制备原始坯料

在ZL109合金中得到了细小的共晶硅片

在7075合金中得到了非枝晶初生α相;在二次重熔过程中

ZL109铝合金中的共晶硅进一步粒状化

7050合金初生α晶粒更加均匀、圆整;锻造成形过程中

ZL109铝合金中的初生α相和共晶体在挤压力作用下发生部分分离

而7050合金中

挤压力使初生α晶粒发生了碰撞连结。经热处理后

ZL109铝合金中的Si相呈块状状较均匀地弥散在α相网状结构中

而7050合金经热处理后

α晶界共晶相减少

重结晶过程使α晶粒细化并呈现多边形化。

Abstract

The structure evolution of ZL109 alloy and 7050 alloy was studied during the process of preparing the raw billet by low super heat casting

remelting

semisolid forming and heat treatment.The thin and symmetrical structure were obtained by using low super heat casting process. The eutectic that lied inside the raw billet of ZL109 alloy melted and came into being liquid phase in the process of remelting

but to the 7050 alloy

the structure of intergranular was fist melted that made grain more uniform and smooth.In the process of semisolid forming

the first αphase and eutectic inside the ZL109 alloy were separated partly and the grain inside the 7050 alloy was drew out along the way of the stress.After heat treated

the sohericity Si phase inside the ZL109 alloy diffused equably in the firstαphase

but to the 7050 alloy

the βphase was discovered in the intergranular and the grain was no longer smoothly like before.