Preparation method of impeller

Abstract

The invention relates to a method for preparing an impeller, which belongs to the field of alloy manufacturing. Metal alloy materials are prepared according to the designed ratio. After the metal alloy materials are smelted, poured, and then demolded, the impeller blank is obtained; the impeller blank is then heat-treated, The impeller is heated to quenching, then aged, and finally air-cooled; then the surface is treated, firstly surface roughening with corundum sand, and then the surface is activated; the surface of the activated impeller is thermally sprayed to form a wear-resistant coating. The preparation method of the impeller provided by the invention can obviously reduce the influence of the residual stress of the forging on the machining size, ensure the center shaft hole size and the runout tolerance of the end face, and improve the production efficiency.

Description

technical field

[0001] The invention relates to a preparation method of an impeller, belonging to the field of alloy manufacturing. Background technique

[0002] The aluminum alloy material is an Al-Cu-Mg-Fe-Ni series alloy that can be strengthened by heat treatment. Because of its low silicon content, its thermal strength is relatively high, and it has a high degree of plasticity in a hot state. The corrosion resistance of the alloy is acceptable, and it can be cut. Sex is good. For the manufacture of internal combustion engine pistons and complex forgings that work at high temperatures, such as compressor impellers, blower impellers, etc.

[0003] Aluminum alloy impeller forgings, mainly used in turbo increasing systems, are stressed structural parts. In the existing production method of aluminum alloy impeller, the internal residual stress of the forging is released after machining, which causes the finished product size to exceed the design requirements. SUMMARY OF T...