CAJ | 학술논문

综述了国内外BT22合金及其改型合金的应用现状,归纳介绍了BT22合金的锻造加工及热处理工艺.结果表明,BT22合金在两相区低于β_转15～50℃的温度范围内多火次锻造,每火次变形量不低于60%.通过严格控制变形速率和终锻温度可制备出组织均匀、晶粒细小的锻件,经两阶段整体热处理后可获得强度、塑性和韧性的最佳匹配.针对我国的研究现状指出了BT22合金大型锻件制备方面亟待解决的问题和未来研究发展的方向.
종술료국내외BT22합금급기개형합금적응용현상,귀납개소료BT22합금적단조가공급열처리공예.결과표명,BT22합금재량상구저우β_전15～50℃적온도범위내다화차단조,매화차변형량불저우60%.통과엄격공제변형속솔화종단온도가제비출조직균균、정립세소적단건,경량계단정체열처리후가획득강도、소성화인성적최가필배.침대아국적연구현상지출료BT22합금대형단건제비방면극대해결적문제화미래연구발전적방향.
Application state of BT22 alloy and its modification alloy is summarized. The forging processing and heat treatment technology of BT22 alloy are introduced. The results indicate that the BT22 bars microstructure can be refined through α+β phases forged (lower than β_T by 15～50℃) with good structure homogeneity. Control the rate of deformation and final forging temperature strictly in processing,and the deformation value at every forging time is greater than 60%. Finally,the two-stage annealing makes BT22 forgings have best matching of strength and plasticity,and have high K_(IC) value. Moreover,several urgent problems and further research direction of BT22 alloy large forgings preparation are put forward.