高碳珠光体钢在温变形过程中的组织变化

钢铁, 2007, 42(2): 56-0.

高碳珠光体钢在温变形过程中的组织变化

1.1. 亚稳材料制备技术与科学国家重点实验室，燕山大学材料科学与工程学院，河北秦皇岛 066004

2.2.河南科技大学材料科学与工程学院，河南洛阳 471003；3. 中国第一重型机械集团公司，黑龙江齐齐哈尔 161042

1.1. State Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China

2.2. School of Materials Science and Engineering, Henan University of Science and Technology,Luoyang 471003, Henan, China

3.3. China First Heavy Industries, Qiqihar 161042, Heilongjiang, China

关键词：高碳钢;珠光体;温变形;超微细复相组织

Microstructure Evolution of High Carbon Pearlitic Steel During Warm Deformation

XIONG Yi , FU Wantang , ZHAO Wen , GUO Mingwei , ZHOU Weihai

Keywords： high carbon steel;pearlite;warm deformation;ultrafine microduplex structure

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。

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.

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