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GWN751K镁合金均匀化热处理
发布人：上海艾荔艾金属材料有限公司www.shailiai.com
更新时间：2015-12-17
通过OM、SEM及布氏硬度分析，研究GWN751K镁合金在不同状态下的显微组织与性能，确定该合金的双级均匀化工艺参数。
GWN751K镁合金均匀化热处理Homogenization heat treatment of GWN751K magnesium alloy
通过OM、SEM及布氏硬度分析，研究GWN751K镁合金在不同状态下的显微组织与性能，确定该合金的双级均匀化工艺参数。结果表明：合金经过440 ℃、6 h初级均匀化后，共晶组织开始发生分解，晶粒开始长大；经过535 ℃、16 h热处理后，合金晶粒明显长大，但元素分布 较为均匀，晶界处仅明显残留含Y化合物；均匀化处理使合金的力学性能得到改善，合金断裂强度为245 MPa，屈服强度为192 MPa，伸长率为12%，较铸态合金的力学性能均有所提高；合金变形抗力较铸态合金的有所增加，这种特性在450 ℃仍保留下来，但差别减小。
The microstructures and properties of the as-cast and homogenized GWN751K magnesium alloy were investigated by optical microscopy, scanning electron microscopy and hardness measurement. The two-step homogenization parameters were determined. The results indicate that the eutectic structures in the as-cast alloy begin to decompose, and the grains begin to grow up after the alloy is homogenized at 440 ℃ for 6 h. After heat treatment at 535 ℃ for 16 h, the elements distribute uniformly and the grains grow up obviously, only yttrium element of intermetallic compounds leaves around boundary. The mechanical properties are improved after homogenization, with σb=245 MPa, σ0.2=192 MPa and δ=12%, which are better than those of the as-cast alloy. The flow stress of the homogenized alloy is higher than that of the as-cast alloy and this character is still retained until 450 ℃, but the difference decreases.
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AILIAI has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. AILIAI develops the best alloy material solutions for current and future challenges.
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For more information on the alloys and services that we supply, call us at 086-021-67660801 or email us at kefu@ailiaigroup.com. You can also get in touch on social media, we are constantly active on Weibo and Weixin.