温度梯度和冷却速率对ZL205A合金凝固组织及性能的影响  

Effect of Temperature Gradient and Cooling Rate on Solidification Structure and Properties of ZL2O5A Alloy

作　　者：郭廷彪[1,2] 孙全珍 李凯哲 黄大伟 王俊杰 邰晓阳 Guo Tingbiao;Sun Quanzhen;Li Kaizhe;Huang Dawei;Wang Junjie;Tai Xiaoyang(State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050

出　　处：《稀有金属材料与工程》2022年第7期2400-2408,共9页Rare Metal Materials and Engineering

基　　金：Key Science and Technology Research and Development Program of Gansu Province (20YF8GA056);Major Science and Technology Special Project of Gansu Province (1302GKDA015)。

摘　　要：由于在不同温度梯度下ZL205A合金冷却速率对凝固组织的影响不同,采用不同壁厚的阶梯状结构的合金,在不同凝固条件下制备厚度不同的合金试样,探究了冷却速率及温度梯度对合金凝固组织及T5处理后合金抗拉伸强度及延伸率的影响,同时探索了合金的相变规律与组织和性能的关联效应。实验结果表明:由壁厚差引起的温度梯度对合金的微观组织及形貌会产生一定的影响,降低温度梯度的合金力学性能显著提升,T5处理后合金的抗拉伸强度达到506 MPa。Due to different influences of cooling rate on the solidification structure of ZL205A alloy under different temperature gradients, the ZL205A alloy with stepped structure of different wall thicknesses was used, and the specimens of different thicknesses were prepared under different solidification conditions. The effects of cooling rate and temperature gradient on solidification structure and tensile strength and elongation of alloys after T5 treatment were explored. In addition, the correlation effect of the phase transformation law with the structure and performance was explored. Results show that the temperature gradient caused by different wall thicknesses have a certain impact on the microstructure and morphology of the alloys. Reducing the temperature gradient can significantly improve the mechanical properties of the alloys. After T5 treatment, the tensile strength of the alloys achieves 506 MPa.

关 键 词：ZL205A合金 壁厚效应 温度梯度 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]