对超低碳钢进行了不同预变形量的单向拉伸及烘烤处理，研究了不同预变形量对试验钢烘烤硬化（BH）性能的影响，并用透射电镜观察了不同预变形量时试验钢中位错的形貌。结果表明：预变形量在0％～4％时，随着预变形量的增大BH值增大；预变形量在4％～8％时，随着预变形量的增大BH值降低；预变形量在8％～15％时，随着预变形量的增大BH值又有所提高；4%预变形量所对应的BH值最大，89／6预变形量所对应的BH值最小；4％预变形量时的位错密度大于8％预变形量时的。
The uniaxial tension with different degree of pre-deformation and baking treatment were carried out on ultra-low carbon steel, and the effect of degree of pre-deformation on the baking hardening property of the test steel was studied, and the dislocation morphology in the test steel with different degree of pre-deformation was observed by the transmission electron microscopy. Results show that when the degree of pre-deformation increased, the BH value increased in the degree of pre-deformation below 4G ; declined in the range of degree of pre-deformation from 40/00 to 8~ and increased again between 8% and 15G. And the maximum and minimum of BH value were found in the degree of pre-deformation of 4% and 8% , respectively. And the dislocation density in 4G degree of pre-deformation was higher than that in 8% degree of pre-deformation.
参考文献
| [1] | 李东升,李雪峰,周贤宾.汽车板材烘烤硬化特性的研究[J].金属成形工艺,2001(02):14-17. |
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