金属学报  1983, Vol. 19 Issue (4): 88-152

论文 本期目录 | 过刊浏览 |

09MnNb钢低温下的冲击断裂行为

蔡体刚;李培良;蒋景凯

包头冶金研究所;包头冶金研究所;包头冶金研究所

IMPACT FRACTURE BEHAVIOUR OF 09MnNb STEEL AT LOW TEMPERATURES

by CAI Tikang; LI Peiliang; JIANG Jingkai (Baotou Institute of Metallurgy) (Manuscript received 10 January; 1981; revised manuscript 4 December; 1982)

蔡体刚;李培良;蒋景凯. 09MnNb钢低温下的冲击断裂行为[J]. 金属学报, 1983, 19(4): 88-152.
, , . IMPACT FRACTURE BEHAVIOUR OF 09MnNb STEEL AT LOW TEMPERATURES[J]. Acta Metall Sin, 1983, 19(4): 88-152.

摘要 参考文献 相关文章 Metrics 全文: PDF(3273 KB)   摘要: 研究了控轧和正火的09MnNb钢低温下冲击断裂行为,通过不同温度下冲击试验的负荷-挠度曲线研究,证明两种状态的钢低温下均具有较高的抗撕裂能力。在脆性转变温度下的断裂是以解理-韧窝混合型断裂方式进行的。控轧钢具有混合的α晶粒——等轴的和冷加工拉长的α晶粒,并具有较高的位错密度;正火钢则是较细的等轴α晶粒,具有位错的胞状亚结构。正火钢的这种组织特征降低了有效α晶粒尺寸,并导致较高的低温冲击韧性。 Abstract：The low-temperature impact fracture of controlled-rolled and normalized steel 09MnNb has been investigated. Data on the load-flexibilty plot after impact test at various temperatures show that the steel either controlled-rolled or normalized offers higher resistance to tearing. The fracture occurred below the ductilebrittle transition temperature is by cleavage with dimpled rupture. The controlledrolled steel has a mixed α-grain structure which consists of equiaxial α-grains and "cold-worked" elongated grains with higher dislocation density, while the normalized steel has finer equiaxial α-grains with cell substructure of dislocation, of which the effective size of a-grain may be reduced. This microstructure of normalized steel makes the improved low-temperature impact property possible. 收稿日期: 1983-04-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 蔡体刚 李培良 蒋景凯 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1983/V19/I4/88 1 沈如璋;沈彼德;林有祚;王家禄;向德渊;叶崇发;李述创;栾凤英,钢铁,16(1981) ,№ 8,26． 2 Heslop, J.; Petch, N. J., Philos. Mag., 3 (1958) , 1128． 3 Tanaka, T., Int. Met. Rev., 26 (1981) , 185．z No related articles found! Viewed Full text Abstract Cited   Shared      Discussed