Mechanical Properties of Thin Slab of Steel SPHC at High Temperature

Special Steel ›› 2011, Vol. 32 ›› Issue (5): 63-65.

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Mechanical Properties of Thin Slab of Steel SPHC at High Temperature

Guo Jingjing¹ , Chen Jian² , Wang Shuhuan³

1. Department of Resource and Environment Engineering, Xingtai Professional Polytechnic College, Xingtai 054035 ；
2. Xingtai Machinery and Mill Roll Co Ltd、Sinosteel Group, Xingtai 054025 ；
3. School of Metallurgy and Energy Resource, Hebei United University, Tangshan 063009;

Received:2011-03-28 Online:2011-10-01 Published:2022-11-04

SPHC钢薄板坯的高温力学性能

果晶晶¹，陈健²，王书桓³

1. 邢台职业技术学院资源与环境工程系，邢台 054035；
2. 中钢集团邢台机械轧辐有限公司，邢台 054025；
3. 河北联合大学冶金与能源学院，唐山 063009;

作者简介:果晶晶(1985-)，女，硕士，河北理工大学毕业，凝固理论与钢的质量控制研究。

Abstract

Abstract: The mechanical properties of 70 mm x 1 250 mm slab of steel SPHC (% : 0.02C, 0.18Mn, 0.03Si, 0.04Als) at 600 ~ 1 350 ℃ have been studied by Gleeble thermal simulation machine and the fracture of tensile specimen is analyzed by scanning electron microscope and energy dispersive X-ray spectrometer. Results show that the I brittle zone and the III brittle zone of thin slab of steel SPHC are respectively at 1200 °C ~ solidus and at 600 ~ 850 ℃ , the plasticity of thin slab is best at 850 〜1200 °C ； the specimen at temperature in the III brittle zone is fractured along grain boundary ； and the inclusions in grain boundary and lamellar ferrite formed in γ to α phase transfomiation lead to brittleness of grain boundary and decrease of plasticity of material in the III brittle zone.

Key words: Steel SPHC, Thin Slab, Mechanical Properties at High Temperature

摘要： 用Gleeble热模拟试验机对SPHC钢(%:0.02C、0.18Mn、0.03Si、0.04Als)70 mm×1250 mm板坯进行600～1 350℃的力学性能的研究,并借助扫描电子显微镜和能谱仪分析了拉力试样的断口。结果表明,SPHC薄板坯的第Ⅰ和第Ⅲ脆性区分别为1 200℃～固相线及600～850℃,850～1 200℃薄板坯的塑性最好;第Ⅲ脆性区试样为沿晶界断裂;晶界处夹杂物及γ→α相变中形成的片状铁素体造成了晶界脆性,降低了第Ⅲ脆性区材料塑性。

关键词: SPHC钢, 薄板坯, 高温力学性能

Guo Jingjing , Chen Jian , Wang Shuhuan. Mechanical Properties of Thin Slab of Steel SPHC at High Temperature[J]. Special Steel, 2011, 32(5): 63-65.

果晶晶, 陈健, 王书桓. SPHC钢薄板坯的高温力学性能[J]. 特殊钢, 2011, 32(5): 63-65.

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Mechanical Properties of Thin Slab of Steel SPHC at High Temperature

SPHC钢薄板坯的高温力学性能

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