采用炉冷热处理使铁镍基高温合金的屈服强度大大提高。如IA合金屈服强度提高13-17kgf/mm~2,相对强度提高20-25％,且有改变晶界状态消除缺口敏感的作用。提高屈服强度的主要原因是γ＇的充分析出。进一步采用程序控制的对数炉冷,在获得高的屈服强度的同时,还能大大地缩短热处理时间,节约能源和人力。
The study has demonstrated that the improvement of yield strength of iron-nickel-base superalloys was markedly performed by adjusting the cooling rate in the course of aging, e.g. the increase of yield strength of IA alloy uprises to 13-17 kgf/mm~2, or the relative increment of 20-25%, provided by furnace cooling instead of air cooling. Its grain boundaries are changed and the notch sensitivity is remedied. The results showed that this improvement is mainly due to full precipitation of γ＇-phase. Thus, it seems to be confirmed that an adoption of the logarithm furnace cooling may both increase the vield strength and shorten the time of heat treatment, hence, the consumption of energy and manpower can be saved as well.
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| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] |
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