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本工作采用氩气雾化INl00合金粉,经真空脱气,装入不锈钢套,封焊后,进行热挤压。挤压棒材具有良好的超塑性,在温度为1040℃应变速率为10~(-2)～10~(-3)/min时,拉伸试样的延伸率可达824～1090％,流动应力仅为1.O～1.5kgf/mm~2。本文研究了挤压工艺参数对合金超塑性和机械性能的影响,探索了最佳超塑性的温度范围,研究了超塑性合金的组织特点以及经热处理后的组织变化。试验结果说明热挤压粉末IN100合金的室温和7000℃的抗张性能以及持久性能均优于铸造IN100合金。
This work using argon atomized INl00 alloy powder, degassing by vacuum, into the stainless steel sleeve, sealing, hot extrusion. Extruded bar has good superplasticity. At the temperature of 1040 ℃ and the strain rate of 10 ~ (-2) ~ 10 ~ (-3) / min, the elongation of tensile specimen can reach 824 ~ 1090% The stress is only 1. O ~ 1.5kgf / mm ~ 2. In this paper, the influence of extrusion process parameters on the superplasticity and mechanical properties of the alloy was investigated. The optimum superplastic temperature range was explored. The microstructure and microstructure of the superplastic alloy were investigated. The test results show that the hot extrusion powder IN100 alloy at room temperature and 7000 ℃ tensile properties and long-term performance are better than cast IN100 alloy.