Microstructure and Property of HD Die Steel With Unsmoothed Surface With Various Laser Parameters

钢铁研究学报(英文版), 2008, 15(3): 52-56.

^1, , ^2, , ^3, , ^4,

1.School of Materials Science and Engineering, Changchun University of Technology, Changchun 130012, Jilin, China;The Key Laboratory of Automobile Materials, The Ministry of Education, Jilin University, Changchun 130025, Jilin, China

2.The Key Laboratory of Automobile Materials, The Ministry of Education, Jilin University, Changchun 130025, Jilin, China

3.School of Materials Science and Engineering, Changchun University of Technology, Changchun 130012, Jilin, China;The Key Laboratory of Automobile Materials, The Ministry of Education, Jilin University, Changchun 130025, Jilin, China

4.The Key Lab of Bionic Materials, The Ministry of Education, Jilin University, Changchun 130025, Jilin, China

基金项目: 国家自然科学基金(50635030)

Microstructure and Property of HD Die Steel With Unsmoothed Surface With Various Laser Parameters

CHEN Li ^1, , ZHOU Hong ^2, , ZHAO Yu ^3, , REN Lu-quan ^4,

2.The Key Laboratory of Automobile Materials, The Ministry of Education, Jilin University, Changchun 130025, Jilin, China

4.The Key Lab of Bionic Materials, The Ministry of Education, Jilin University, Changchun 130025, Jilin, China

Keywords： mierostrueture

The reticulate unsmoothed surfaces on HD die steel, which imitate the surface of soil-burrowing animals (such as the dung beetle, earthworm, pangolin, and ant) are produced with various laser parameters. The character-istics (including width, depth, area ratio, and volume), microstructure, and hardness of the unsmoothed units are studied. At the same time, the wear resistance of the material with an unsmoothed surface is measured. The results show that the width and volume of the unit increase, the microstructure becomes coarser, the hardness decreases, and the wear resistance improves with the increase of the current intensity and pulse duration within a certain range. However, there is little difference between the extent to which the wear resistance of the material increases and the unsmoothed surface, when the current intensity and pulse duration increase to some extent. The wear resistance of the unsmoothed material under 300 A or 20 ms is better in the experiments. The improving extent of the wear resist-ance lies in a combination of the characteristics, microstructure, and hardness of the unsmoothed unit. An un-smoothed material with better properties can be processed if the laser parameters are well matched.

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Microstructure and Property of HD Die Steel With Unsmoothed Surface With Various Laser Parameters

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