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金属学报  1983, Vol. 19 Issue (1): 76-152    
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热轧板(卷)断口分层的研究
戚濂;殷碧群;浦绍康
武汉钢铁公司钢铁研究所;武汉钢铁公司钢铁研究所;武汉钢铁公司钢铁研究所
ON THE FRACTURE DELAMINATION OF HOT-ROLLED PLATES OR COILS
QI Lian; YIN Biqun; PU Shaokang (Research Institute of Wuhan Iron and Steel Company)
引用本文:

戚濂;殷碧群;浦绍康. 热轧板(卷)断口分层的研究[J]. 金属学报, 1983, 19(1): 76-152.
, , . ON THE FRACTURE DELAMINATION OF HOT-ROLLED PLATES OR COILS[J]. Acta Metall Sin, 1983, 19(1): 76-152.

全文: PDF(2816 KB)  
摘要: 本文研究了热轧板(卷)断口分层形成的冶金因素。钢中存在与轧面平行的脆弱显微平面(延伸的夹杂物和树枝状偏析等)是产生分层的内在因素,当它们在断裂面下严重偏聚时,在断裂过程中厚向应力的作用下引起厚向分离,形成断口分层。沿晶脆化带的形成是由于卷曲后缓慢冷却过程中,磷等杂质元素从晶内向晶界扩散产生的回火脆性。低温轧制(低于A_(r3))产生平行板面的(100)织构时,分层裂纹以解理方式扩展。 形成分层的必要条件是金属基体具有足够高的韧性,使试样在断裂过程中发生塑性变形。控制能量冲击试验结果和分层壁上脆性平面存在波纹状滑移线,说明分层裂缝产生于主断口断裂之前。
Abstract:The metallurgical factors influenced the hot-rolled plates or coils on to form the fracture delamination have been investigated. The fragile micro-planes, including stretched inclusions, dendritic segregations, etc., which occur in steel and parallel to the rolling direction, seem to be the inherent factor. As the segregation of these micro-planes accumulated beneath the fracture surface, such delamination is formed under through thicknessstress in the propagation of fracture. The intergranular embrittlement zone is due to the temper brittleness produced by phosphorus and other impurities which diffused from intragrain to grain boundary in the slow cooling period after coiling. Delamination cracks propagate as mode of cleavage when (100) texture parallel to plate surface obtained by low temperature(
收稿日期: 1983-01-18     
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