摘要
分别采用火焰矫形和电弧矫形两种方法对4mm厚的船用5083铝合金板进行热矫形,对比分析了不同矫形方法对铝合金显微组织和力学性能的影响。金相试验结果显示,采用TIG电弧矫形时,试板正面为细小的等轴晶,且析出相尺寸较小;而采用火焰矫形时,试板正面和背面的组织已完全再结晶,晶粒明显长大。显微硬度试验结果显示,热矫形后试件的显微硬度均低于母材,但电弧矫形试件的硬度比火焰矫形的大。拉伸试验结果显示,电弧矫形试样的平均抗拉强度和平均屈服强度分别比火焰矫形的大14.7、12.9 MPa,但平均伸长率减小。
5083 aluminum alloy plate for ship with thickness of 4 mm was thermal corrected by using flame straightening and arc straightening, and the effects of different straightening methods on the microstructure and mechanical properties of the aluminum alloy were analyzed. The metallographic test results show that when the TIG arc straightening is used, the microstructure of the front side of the plate is free equiaxed crystals, and the precipitated phase size is small. While, when the flame straightening is used, the microstructure of the front and back sides of the test plate has been completely recrystallized and the grains grow obviously. The microhardness test results show that the microhardness of the specimens after thermal correction is lower than that of the base metal, and the microhardness of the specimen with arc straightening is bigger than that with flame straightening. The tensile test results show that the average tensile strength and yield strength of the arc straightening specimen are 14.7, 12.9 MPa bigger than that of the flame straightening specimen, while the average elongation rate decreases.
出处
《热加工工艺》
CSCD
北大核心
2018年第1期203-205,209,共4页
Hot Working Technology
基金
博士后科学基金资助项目(2016M590821)
国防科学技术工业基础研究项目(A0720133002)
河北省自然科学基金项目(2016208077)
河北省科技计划项目(15214705D)
关键词
5083铝合金
火焰矫形
电弧矫形
显微组织
力学性能
5083 aluminum alloy
flame straightening
arc straightening
microstructure
mechanical properties
