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。
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 1 200℃ - solidus and at 600 - 850℃, the plasticity of thin slab is best at 850 - 1 200℃ ; the specimen at temperature in the II! brittle zone is fractured along grain boundary; and the inclusions in grain boundary and lamellar ferrite formed in ＂y to ct phase transformation lead to brittleness of grain boundary and decrease of plasticity of material in the Ⅲ brittle zone.
出处
《特殊钢》
北大核心
2011年第5期63-65,共3页
Special Steel
关键词
SPHC钢
薄板坯
高温力学性能
Steel SPHC, Thin Slab, Mechanical Properties at High Temperature
