金属学报  1981, Vol. 17 Issue (3): 259-365

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冷拉Si-Cr气阀钢的断裂力学分析

殷匠;许经峰

上海第五钢铁厂;上海第五钢铁厂

FRACTURE-MECHANICS ANALYSIS OF COLD-DRAWN Si-Cr VALVE STEEL

by Yin Jiang and Xu Jingfeng (Shanghai No. 5 Steel Works)

殷匠;许经峰. 冷拉Si-Cr气阀钢的断裂力学分析[J]. 金属学报, 1981, 17(3): 259-365.
, . FRACTURE-MECHANICS ANALYSIS OF COLD-DRAWN Si-Cr VALVE STEEL[J]. Acta Metall Sin, 1981, 17(3): 259-365.

摘要 参考文献 相关文章 Metrics 全文: PDF(989 KB)   摘要: 本文通过对冷拉Si-Cr气阀钢的断裂力学分析,将各种影响冷拉劈裂的因素归结为对钢的断裂韧度K_(Ic)、切向冷拉残余应力峰值σ_(tm)和表面缺陷深度α这三个方面。应用如下公式判断冷拉钢棒和钢丝是否可能发生冷拉劈裂破坏: K_(Ic)≈σ_(tm)((πα)~(1/2))(K_1/K_0) 冷变形后较精确的K_(Ic)值系由冷镦试样测得。 据此制定了控制缺陷深度的冷拉工艺,使Si-Cr钢在室温能够经受的一次冷拉压缩率达20—30％或更高,大大超过了以往规定的压缩率限度,达到了热拉才能容许的压缩率,避免了劈裂和再结晶粗晶,取得了高产优质的效果。 Abstract：A fracture-mechanics approach was used in studying the cold-drawn splitting in Si-Cr valve steel. It seems that the cold deformation fracture toughness, K_(Ic),the peak value of cold-drawn tangential residual tensile stress, σ_(tm), and the depth of surface blemish, α, are the three main factors affected the splitting. An expression to determine the growth of split in cold-drawn rod may be as follows:K_(Ic)=σ_(tm)(πα)~(1/2)(K_I/K_0)The exact value of K_(Ic) is easily given by cold-heading specimen after cold deformation. Thus, the cold-drawing process makes possible to control the blemish depth. This process allows the steel to withstand a single cold drawing reduction of 20—30% or more at room temperature without splitting or recrystallized granular fracture and to give superior performance that can ever be obtained previously by hot drawing. 收稿日期: 1981-03-18      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 殷匠 许经峰 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1981/V17/I3/259 [1] #12 [2] #12 [3] #12 [4] 钢铁研究院断裂韧性研究组,金属学报,13(1978) ,214． [5] 小坂田宏造,塑性加工,9(1978) ,665． [6] Elber, W., Fracture Toughness and Slow-Stable Cracking, Proc. 1973 National Symp. Fract. Mech., Part 1, ed. by P. C. Paris, (ASTM STP 559) , ASTM, 1974, p. 45． [7] Sin, G. C., Handbook of Stress-Intensity Factors, Inst. of Fracture and Solid Mech., Bethlehem, Pennsylvania, 1973, p. 1． 3． 1-1; [8] Rooke, D. P. and Cartwight, D. J., Compendium of Stress Intensity Factors, HMSO, London, 1976, p. 233． [9] 未发表工作. No related articles found! Viewed Full text Abstract Cited   Shared      Discussed