排序方式: 共有20条查询结果,搜索用时 15 毫秒
1.
2.
The present investigation showed that the re-laxation peak at about 200℃ (f≈1Hz) was relatedto bainitic transformation in a CuZnAl alloy.Thepeak decreased when bainite precipitated.Theactivation energy of the peak was the same as theapparent activation energy of bainitic transforma-tion.According to the relations between the peakand the bainitic transformation,the mechanism ofthe peak has been discussed. 相似文献
3.
4.
5.
7.
8.
通过多种材料、多种工件、多批次的加工,对常见真空热处理工艺参数的确定,摸索出一些经验公式,并在实际生产中取得良好效果。 相似文献
9.
铸轧法生产罐用3004铝合金板材工艺中析出相的研究 总被引:1,自引:0,他引:1
本文用透射电镜分析了铸轧法生产罐用3004铝合金板材工艺中析出相的尺寸,形貌和分布。分析结果表明,均匀化处理,中间退火和中间退火后的冷轧对析出相的尺寸,形貌和分布有显著影响。 相似文献
10.
The effect of rare earth(RE) on continuous heating transformation of a high speed steel for rolls was investigated by using differ-ential scanning calorimetry(DSC) with combination of microstructure analysis.Determination of the Ac1 and Ac3,the starting temperature of carbide dissolution and melting upon heating,the enthalpy change for the α→γ transformation and overall carbide dissolution were also es-tablished.It was found that RE could reduce the volume fraction of large eutectic carbides and the chrysanthemum-like eutectic colonies but could not change the phase composition.RE made a little change to Ac1,but the variation in Ac3 and enthalpy for the α→γ followed an in-creasing pattern as the RE addition increased.The start temperatures of carbides dissolution increased with increase of RE addition,which may be associated with the influences of RE on the morphology of carbides,but the overall enthalpy change of carbides dissolution decreases as the RE addition increased.Moreover,the start temperature of melting also increased with increasing RE addition. 相似文献