4.5 Article

Laser remelting of AISI H13 tool steel: influence of cooling rate on the surface properties

期刊

出版社

IOP Publishing Ltd
DOI: 10.1088/2051-672X/ac991c

关键词

H13 tool steel; laser remelting; multiphysics simulation; temperature gradient; mechanical properties

向作者/读者索取更多资源

In this paper, a high energy density laser was used to improve the hardness of H13 tool steel. A numerical model was established to investigate the temperature field and profile of the molten pool. The effect of laser scanning speeds on heat-affected depth, surface topography, and mechanical properties was analyzed.
Laser surface remelting is an effective and suitable process to extend the longevity of components without additional materials. In this paper, a high energy density laser with a large size was used to improve the hardness of H13 tool steel. A predictive numerical multiphysics coupled model was established to investigate the temperature field and the profile of the molten pool. The effect of laser scanning speeds is investigated in terms of heat-affected depth, surface topography, and mechanical properties. In detail, the simulated temperature gradients with laser scanning speed in a range of 12 to 24 mm s(-1) are similar to 8.4 x 10(5) K m(-1), involving a cooling rate less than 1 x 10(4) K s(-1) can prevent cracking. The hardness of the remelted zone is in the range of 700-850 HV0.2, and the tensile performances are also recorded. The model in this work could not only link the mechanical properties with process parameters together, but also guide the actual experiment or processing bypassing the trial-and-error method, as well as extend to other materials and laser additive manufacturing.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据