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金属学报  1981, Vol. 17 Issue (2): 137-245    
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30CrMnSi钢的贝氏体形态
刘文西;邹美运;马福本
THE MORPHOLOGY OF BAINITE IN A 30CrMnSi STEEL
Liu Wenxi; Zou Meiyun and Ma Fuben
引用本文:

刘文西;邹美运;马福本. 30CrMnSi钢的贝氏体形态[J]. 金属学报, 1981, 17(2): 137-245.
, , . THE MORPHOLOGY OF BAINITE IN A 30CrMnSi STEEL[J]. Acta Metall Sin, 1981, 17(2): 137-245.

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摘要: 用薄膜透射电子显微镜研究了30CrMnSi钢的贝氏体相变,得到如下的结果,(1)在这个钢中看到了双轨式或侧析式下贝氏体和分叉式上贝氏体。观察到下贝氏体片的中筋和上贝氏体片端的阶梯。(2)在下贝氏体中,测定了渗碳体与贝茵铁素体基体之间的位向关系,贝茵铁素体与奥氏体之间的取向关系,它们是: (010)_θ∥(1(?))_B,(1(?))_B∥(011)_A; (103)_θ∥(101)_B,(101)_B∥((?)1)_A,认为碳化物是由奥氏体析出的.(3)下贝氏体的形成与回火第二阶段,即残留奥氏体的分解是相似的。这个阶段中的奥氏体、ε碳化物、渗碳体与贝茵铁素体四种相之间的关系可以统一地表示如下: (111)_A∥(000(?))_ε∥(103)_θ∥(101)_B, (011)_A∥((?)10)_ε∥(010)_θ∥(1(?))_B, ((?)1(?))_A∥((?)10)_ε∥(403)_θ∥(121)_B,所有结构的特定的密排面和密排方向是平行的。
Abstract:The bainite transformation in a 30CrMnSi steel was studied by thin foil transmission electron microscopy. It was found that: (1) The lower bainite of twin rail mode or of side precipitation mode and the upper bainite of branch mode are present in the steel. The midribs occur in the lower bainite plates and the step-like fronts in the upper ones. (2) The determination of orientations not only between the cementite and bainite-ferrite matrix but also between the matrix and austenite has been carried out as:(010)_θ∥(1(?))_B, (1(?))_B∥(011)_A,(103)_θ∥(101)_B, (101)_B∥((?))_A thus the bainite carbide precipitation from austenite may be proposed. (3) The formation of lower bainite seems to be analogous to the second stage of tempering, i. e. decomposition of retained austenite. During this stage, the correlation among four phases: austenite, e-carbide, cementite and bainite ferrite may be possibly expressed as a whole by the following parallelisms:((?)1)_A∥(000(?))_e∥(103)_θ∥(101)_B,(011)_A∥(1(?)10)_e∥(010)_θ∥(1(?))_B,((?)1(?))_A∥((?)010)_e∥((?)03)_θ∥(12(?))_B Specific close packed planes and directions are parallel in all these structures.
收稿日期: 1981-02-18     
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