• CN:11-2187/TH
  • ISSN:0577-6686

›› 1990, Vol. 26 ›› Issue (4): 20-24.

• 论文 • 上一篇    下一篇

微合金化元素钛对中碳非调质钢韧性的影响

董瀚;李桂芬;鲁肇俊   

  1. 钢铁研究总院
  • 发布日期:1990-07-01

THE EFFECT OF MICROALLOYING ELEMENT Ti ON THE TOUGHNESS OF MEDIUM CARBON MICROALLOYED FORGING STEELS

Dong Han;Li Guifen;Lu Zhaojun   

  1. Central Iron and steel Research Institute
  • Published:1990-07-01

摘要: 探讨了钛对非调质钢的显微组织和变形过程的影响。测试了钢在平面应变状态下的断裂韧性,计算了冲击和拉伸状态下的裂纹形成能和扩展能。用SEM研究了断口形貌。结果表明,钢中加入钛可使先共析钛素体量增多,在冲击状态下,加入钛对韧性影响不大,钒钢和钒钛钢均为准解理断裂,但在静态拉伸时,钒钛钢为剪切断裂,钒钢为准解理断裂。

关键词: 非调质钢, 韧性,

Abstract: The influence of microalloying element Ti on the microstructure and deformation process of microalloyed forging steels was discussed. The fracture toughness was measured. The crack initiation energy and propagation energy were calculated under impact and tensile testing. The fraction of pre-eutectoid ferrite would be increased with the addition of Ti. In the impact testing, the fracture mode in steels is quasi-cleavage no matter what type of microstructure of the steel is. In the tensile testing, the fracture is in the shear mode in the steel with F-P microstructure, but it is also in the quasi-cleavage mode in the steel with bainite microstructure.

Key words: 非调质钢, 韧性,