Baoshan Iron & Steel Co., Ltd.

China Baowu Steel Group Corporation Limited

Weineng Tang

Shiwei Xu

Haomin Jiang

Pijun Zhang

Nick Birbilis

Xiaobo Chen

Zhuoran Zeng

Mingzhe Bian

Changlong Zhuo

Jianfeng Nie

Christopher H J Davies

Cong Ke

Jichun Dai

Christopher Hj Davies

The present invention provides magnesium or magnesium alloys having high formability at room temperature, the magnesium or magnesium alloys having a grain size ≤2 microns. The present invention also provides a method for manufacturing the magnesium or magnesium alloys having high formability at room temperature. The magnesium or magnesium alloys having high formability at room temperature are prepared by simple processing means. The present invention overcomes a problem of poor formability at room temperature.

Magnesium or magnesium alloy having ultra-high formability at room temperature and manufacturing method thereof

The present disclosure provides a high-efficient rolling process for magnesium alloy sheet. Parameters of the rolling process are: the rolling speed of each rolling pass is 10-50 m/min, the rolling reduction of each rolling pass is controlled to be 40-90%, and both the preheating temperature before rolling and the rolling temperature of each rolling pass are 250-450&#xb0; C. The present disclosure also provides a preparation method for magnesium alloy sheet, comprising: 1) preparing rolling billets; 2) high-efficient hot rolling; and 3) performing annealing. The rolling process can improve the mechanical performance especially, the strength and ductility of the sheet.

Rolling and preparation method of magnesium alloy sheet

A film forming treatment agent for a composite chemical conversion film for magnesium alloy, and a film forming process method, and a composite chemical conversion film are provided. Components of the film forming treatment agent for a composite chemical conversion film for magnesium alloy comprise a water solution and a suspension of reduced graphene oxide flakes to the water solution. The water solution comprises strontium ions at 0.1 mol/L to 2.5 mol/L and phosphate ions at 0.06 mol/L to 1.5 mol/L, and pH of the water solution is 1.5 to 4.5. Concentration of the reduced graphene oxide varies between 0.1 mg/L and 5 mg/L. The film forming process method for a composite chemical conversion film for magnesium alloy comprises the following steps of: 1) pretreatment on surface of magnesium alloy matrix; 2) immersion of magnesium alloy matrix in the film forming treatment agent; and 3) removal of magnesium alloy pieces for drying in air. The composite chemical conversion film for magnesium alloy is formed by immersing magnesium alloy matrix in the film forming treatment agent. The composite chemical conversion film for magnesium alloy has excellent corrosion-resistance performance in 3.5 wt % NaCl solution.

Film forming treatment agent for composite chemical conversion film for magnesium alloy, and film forming process

A die-casting magnesium alloy. The die-casting magnesium alloy comprises, by mass percent, 1% to 5% of La, 0.5% to 3% of Zn, 0.1% to 2% of Ca, 0.1% to 1% of Mn and the balance Mg and other inevitable impurities. The die-casting magnesium alloy manufacturing method comprises smelting, refinement and die-casting. The die-casting magnesium alloy has good mechanical performance, die-casting performance and heat conduction performance.

Low-cost high-heat-conduction die-casting magnesium alloy and manufacturing method therefor

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Shanghai, China

Weineng Tang