Southwest Jiaotong University

Shanghai Micro Electronics Equipment Co., Ltd.

Guodong Cui

Chengsong Zhang

Yuxuan Liu

Chunfeng Song

Qin Xu

Gang Sun

Mingying Ma

Yifei Chen

Dazhi Chen

Yanping Lan

Disclosed is a method for surface-modifying titanium alloy, comprising the following steps: carburizing titanium alloy in solid carburizing agent A and solid carburizing agent B, and then performing gas co-infiltration to realize surface modification treatment of titanium alloy; the solid carburizing agent A includes raw materials of charcoal powder a, barium carbonate, calcium carbonate, barium acetate, urea and cerium carbonate, and the solid carburizing agent B includes raw materials of charcoal powder b, barium carbonate, calcium carbonate and cerium carbonate; and the gases used in the gas co-infiltration are ammonia, air and acetylene.

Method for surface-modifying titanium alloy

The disclosure provides a method of making an iron matrix composite. A Fe&#x2014;Ni&#x2014;P composite powder having a particle size of one to two micrometers and a Fe&#x2014;N powder having a particle size of 100 to 250 nanometers are used as the raw material. The size and axial displacement of pressing heads of a graphite mold are controlled to realize the control of the porosity of porous iron. The composite produced comprises two surface layers of a Fe&#x2014;Ni&#x2014;P alloy and an intermediate layer of porous iron having a porosity of 14 to 39%. The method enables a reduced weight of the Fe&#x2014;Ni&#x2014;P alloy and enables shock absorption and damping properties to be imparted to the composite. In addition, an optional subsequent deep cryogenic treatment allows the Fe&#x2014;Ni&#x2014;P alloy to be subjected to phase transition from a metastable gamma-phase to an alpha-phase, thereby substantially improving the hardness and strength thereof.

Method of making iron matrix composite

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Chengdu, China

Guodong Cui