Titanium alloy metal injection molding automotive pump wheel MIM parts

Titanium alloy metal injection molding automotive pump wheel MIM parts

Turbocharger

The turbocharger is mainly composed of a turbine, a pump wheel, a rotor, an impeller, etc. It uses the inertia force generated by the high-pressure exhaust gas discharged from the engine to drive the pump wheel to rotate. The rotor drives the turbine to rotate, increasing the engine intake pressure.

In recent years, the development and production of turbocharger MIM parts have become the focus of scientific research work, and the turbocharger is also one of the iconic parts manufactured by MIM.  Its structure is extremely complex, the working environment is harsh, and the accuracy requirements are high. However, other processing methods are more expensive and the accuracy is difficult to control.  Turbocharger parts are mainly composed of nickel-based ultra-high temperature alloys, titanium alloys and other materials, and were previously processed using traditional powder metallurgy technology.

Germany's BASF company has made a great contribution to MIM turbocharger components. BASF uses a unique Catamold process to manufacture MIM turbocharger components.  The mechanical strength of MIM parts and investment casting samples were compared at room temperature, and the results are shown in Table 2. This demonstrates the superior material properties achieved using the Catamold process.

Domestically, Qinhuangdao Zhongwei Precision Mechanical Parts Co., Ltd. and Qu Xuohui of the University of Science and Technology Beijing used argon atomized K418 alloy powder as raw material, added a self-designed multi-component paraffin-based binder, and used injection molding technology to prepare Complex-shaped supercharger turbines are optimized through subsequent hot isostatic pressing and heat treatment processes to produce a supercharger turbine that is dense, has uniform structural composition, excellent mechanical properties, an outline that meets the usage requirements, and a good surface finish. It has broken through key technical difficulties such as structural design of complex-shaped supercharged turbine molds, optimization of injection molding process parameters, sintering densification and dimensional accuracy control, and its comprehensive mechanical properties are significantly improved compared to cast turbines.

Qinhuangdao Zhongwei Precision Mechanical Parts Co., Ltd. mainly uses metal (or non-metal) powder near net forming and injection molding processes to engage in the research and development, production, sales and value-added services of new materials and their products. Through the continuous improvement of new material technology and processing technology Innovation, development and reserve to lead the upgrading of traditional industries, import substitution and the development of emerging fields. The company's main business application fields are divided into powder metallurgy press forming process application fields, powder injection molding and liquid metal process application fields and soft magnetic composite material application fields. Among them, the powder metallurgy injection molding process application fields are: fuel vehicles, new energy vehicles, high-efficiency vehicles Energy-saving home appliances, power tools, etc.; powder injection molding and liquid metal process application fields are: automobiles, consumer electronics, communications, bathroom, etc.; soft magnetic composite material application fields are: new energy vehicles, photovoltaics, power supplies, filters, communications, motors wait.