锻造温度对汽车轻合金组织与性能的影响

• 作 者: 张国新 李敏 张志
• 机 构: 河北机电职业技术学院,
• 出 处: 热加工工艺
• 发表日期: 2017年07期
• 关键词: 锻造温度 始锻温度 终锻温度 轻合金 力学性能 AZ80Ce合金 锻件尺寸 断后伸长率 锻造工艺 平均晶粒尺寸

在锻比不变的情况下,采用不同锻造温度进行了AZ80Ce汽车轻合金的锻造,并进行了显微组织和力学性能的测试与分析。结果表明,随始锻温度从300℃提高至450℃或终锻温度从300℃提高至350℃,锻件的平均晶粒尺寸均先减小后增大,力学性能先提高后下降。始锻温度优选为425℃、终锻温度优选为330℃;在该优选工艺参数下锻件的抗拉强度、屈服强度和断后伸长率均达到最大值,分别为384 MPa、274 MPa、14.9%。

In the same forging ratio, the forging of AZ80Ce automotive light alloy was carried out with different forging temperatures, and the microstructure and mechanical properties were tested and analyzed. The results show that the average grain size of the forging decreases first and then increases with the increase of initial forging temperature from 300 ℃ to 450 ℃ or the final forging temperature from 300 ℃ to 350 ℃. The mechanical properties firstly increase and then decrease. The initial forging temperature is preferably 425 ° C and the final forging temperature is preferably 330 ° C. The maximum tensile strength, yield strength and elongation at break of the forging are 384 MPa, 274 MPa and 14.9% .