CAJ | 학술논문

对攀长钢公司生产的GH4099合金?350 mm棒材整支炸裂的原因分析，得出GH4099合金成分O、S、Si、Al等在晶界处偏聚，形成低熔点相，是裂纹产生的根源。在快锻开坯过程中在钢锭心部沿晶界萌生裂纹源，径向锻造及冷却过程中裂纹延伸，残余应力释放导致棒材炸裂。在工艺上采取锻造前钢锭进行均匀化处理，锻造后棒材采用缓冷处理措施进行改善。
대반장강공사생산적GH4099합금?350 mm봉재정지작렬적원인분석，득출GH4099합금성분O、S、Si、Al등재정계처편취，형성저용점상，시렬문산생적근원。재쾌단개배과정중재강정심부연정계맹생렬문원，경향단조급냉각과정중렬문연신，잔여응력석방도치봉재작렬。재공예상채취단조전강정진행균균화처리，단조후봉재채용완랭처리조시진행개선。
The reasons for bursting of the whole?350mm GH4099 alloy bar produced by our company were analyzed. The results showed that the composition of O,S,Si,Al gathered at grain boundary and formed low melt-ing point phases, which resulted in cracking. During cogging by forging press, cracks formed in the center of the ingot along the grain boundary and the cracks propagated during radial forging and cooling, so the bar burst due to release of the residual stress. By homogenization treatment before ingot forging and slow cooling of the bars af-ter forging, the cracks were avoided to a great degree.