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Therefore, in this work, the investigation would be done for those two materials.
The pin samples were made of tool materials, had a semi-ball with the radii 6mm on one side.
The morphology of the pin of three materials after test was observed by microscope and SEM.
With the increase of velocity, the relative motion of the friction pair trended to intensify, and the wear of these three materials increased.
Acknowledgements This work is supported by National Natural Science Foundation of China (No. 50935001) and Graduate student special plan for science and technology innovation activities of BIT.

Acknowledgements This work was financially supported by the National Natural Science Foundation of China (51368019), Science and Technology Program of Science and Technology Agency of Jiangxi province (20122BBG70186), Science and Technology Program of Education Department of Jiangxi province (GJJ13327), and Jiangxi Higher Education Innovation Program (JXJG-14-5-31).
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Study on the Determination of manganese in Alloy Steel Materials by Spectrophotometry Li Meimei 1,a Li Naijun1,b 1School of Science Shenyang University, China ammli66@163.com, blnj_1030111@163.com Keywords: spectrophotometry, alloy steel, periodate, manganese.
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These devices differ in their mechanical complexity and the materials used for the sliding surfaces [5].
Acknowledgments The financial support by the China Postdoctoral Science Foundation funded project (Number: 20110491739）and National Science and Technology Supporting Item (2009BAJ28B01-3) is greatly appreciated.
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Journal of Materials Science, 42(9), 2917–2933
Journal of materials science, 42(3), 729–746
Journal of materials science, 42(12), 4667–4674
JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 18(3), 472-476
Journal Of Materials In Civil Engineering, 16(5), 497-506