摘要
以Mg、Sr、Nb和Ce四种元素对A1-Si系汽车气缸材料进行微合金化处理，并进行了抗拉强度和断面收缩率测试。结果表明，随着温度的升高，材料的抗拉强度连续下降；温度从250℃增加到400℃时抗拉强度迅速下降：当超过400℃时抗拉强度缓慢下降；材料的低塑性区温度范围为305--418℃，在这一区域，材料的拉伸断口形貌表现为较为明显的沿晶断裂。
The A1-Si automobile cylinder material was micro-alloyed with four elements such as Mg, Sr, Nb and Ce, and the tensile strength and section reduction of the material were tested. The results show that, with temperature increasing, the tensile strength of the material decreases continuously, and when the temperature increases from 250 ℃ to 400 ℃, the tensile strength of the material decreases rapidly, but decreases slowly over 400℃. The temperature range of the material with low plasticity is from 305 ℃ to 418 ℃, and in the area, the morphology of tensile fracture shows obvious intergranular fracture.
出处
《铸造技术》
CAS
北大核心
2013年第11期1465-1467,共3页
Foundry Technology
关键词
汽车气缸材料
微合金化
热塑性行为
抗拉强度
断面收缩率
automobile cylinder material
micro-alloying
thermo plasticity behavior
tensile strength
section reduction
