高碳珠光体钢在温变形过程中的组织变化

熊毅;傅万堂;赵文;郭明伟;周维海

钢铁 ›› 2007, Vol. 42 ›› Issue (2) : 56-0.

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钢铁 ›› 2007, Vol. 42 ›› Issue (2) : 56-0.
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高碳珠光体钢在温变形过程中的组织变化

  • 熊毅1,2,傅万堂1,赵文1,郭明伟3,周维海3
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Microstructure Evolution of High Carbon Pearlitic Steel During Warm Deformation

  • 熊毅1,2,傅万堂1,赵文1,郭明伟3,周维海3
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摘要

用SEM、TEM等方法研究了一种原始组织为层片状珠光体的高碳钢在多向温变形(楔横轧)和单向温变形(压缩)条件下试样心部与表层显微组织的演变情况。结果表明,在多向温变形条件下,试样表层可获得铁素体晶粒与渗碳体颗粒尺寸均在0.3 μm以下的超微细(α+θ)复相组织,心部渗碳体片虽已碎断并部分球化,但其排布形态与变形珠光体基本保持一致,而单向温变形条件下的情况则恰好相反;变形过程中试样所受应力、应变状态的不同是引起组织差异的根本原因。

Abstract

The microstructure evolution of high carbon steel with lamellar pearlite structure during multiaxis and singleaxis warm deformation (warm cross wedge rolling and warm compression) was investigated by the use of SEM, TEM etc. The results show that during multiaxis warm deformation, ultrafine (α+θ) microduplex structure is obtained in surface of the specimen where the size of equiaxed α grains and fully spheroidized θ particles is less than 0.3 μm. In the central part of the specimen, original lamellar θ is fragmented but its arrangement keeps as that as deformed pearlite. For singleaxis deformation, the results are quite different. The difference in strain and stress of specimen during deformation is the primary reason for different microstructure evoluation.

关键词

高碳钢 / 珠光体 / 温变形 / 超微细复相组织

Key words

high carbon steel / pearlite / warm deformation / ultrafine microduplex structure

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熊毅, 傅万堂, 赵文, . 高碳珠光体钢在温变形过程中的组织变化[J]. 钢铁, 2007, 42(2): 56-0
XIONG Yi, FU Wantang, ZHAO Wen, et al. Microstructure Evolution of High Carbon Pearlitic Steel During Warm Deformation[J]. Iron and Steel, 2007, 42(2): 56-0

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