以正交设计法探究影响高Mg合金厚板屈服强度的关键因素

Investigation of Influence on Yield Strength of High Mg Alloy Plate in Orthogonal Design Method

通过正交设计的实验方法,探究了高Mg合金中Mg元素含量、Mn元素含量、热轧终了温度、退火温度等因素对板材屈服强度的影响。结果表明,影响最大的因素是Mg元素含量,而Mn元素含量、热轧终了温度、退火温度等对板材屈服强度影响较小。随着Mg、Mn元素含量增加,板材屈服强度呈上升趋势,因此Mg元素含量及Mn元素含量应控制在范围上限。随着轧制终了温度升高,板材屈服强度随之降低,但变化幅度很小,故不必严格控制;随着退火温度升高,板材屈服强度变化不大,即退火温度对板材屈服强度影响很小,但从腐蚀因素角度考虑,退火温度应控制在270℃~280℃。

In this paper,the effects of Mg element content,Mn element content,temperature and annealing temperature on the yield strength of plate are investigated by orthogonal design. The results show that the most influential factor is Mg element content,while Mn element content,temperature and annealing temperature have little effect on yield strength of plate. As the content of Mg and Mn increases,the yield strength of plate is increasing,so the content of Mg element and Mn element should be controlled in the upper limit. With the increase of rolling temperature,the yield strength of the plate increases,but the variation range is small,so it is not necessary to strictly control. As the annealing temperature rise,plate yield strength changed little,the sheet annealing temperature on the yield strength effect is very small,but consider from the angle of corrosion factors,annealing temperature should be controlled in 270℃ ～ 280℃.