Evaporative pattern double-liquid thermal combination impeller casting technology

Abstract

The invention provides an evaporative pattern double-liquid thermal recombination impeller casting technology. The technology comprises the following steps that foams special for evaporative pattern casting adhere to form an impeller foam model; the same foams on blades of the impeller foam model are cut according to the vacancy of a partition fusing layer and the size of a high-chromium alloy layer to obtain an impeller center body foam model; the partition fusing layer adheres to the impeller center body foam model; then, the high-chromium alloy layer of the thickness of 38mm adheres to the partition fusing layer; a sprue is installed, and a dead head and an air outlet piece are installed on the upper portion of the sprue. Paint is applied to the surface of the impeller foam model, the impeller foam model is put into a drying room to be dried and conveyed into a casting box, the body of an impeller needs casting first in a watering feeding mode for 5-8s, the high-chromium alloy layer is cast therewith stably, the casting time needs to be controlled to be within 30s, and double sprues are cast, and after the sprues are full, the process is stopped and feeding is conducted at the same time. Being applied to casting impellers having good wear resisting performance and stability, an impeller technology reaches a new level, and can further reduce the weight of a single impeller and energy consumption and improve efficiency.

Description

technical field [0001] The invention relates to a casting process of an impeller, in particular to a process of casting an impeller with lost foam. Background technique [0002] At present, most of the impellers in China use a liquid casting impeller, one is a high-manganese impeller with good integrity but not wear-resistant, and the other is a high-chromium alloy impeller with 8% content, which has a certain degree of wear resistance, but the overall The performance quality is not very good, and sometimes there are cracks in the 6 squares of the main body of the impeller center, resulting in poor casting quality and low cost performance. Contents of the invention [0003] In order to solve the above problems in the background technology, the present invention provides a casting process of the impeller, which adopts the lost foam double-liquid thermal composite casting impeller, fills the blank of the domestic impeller casting technology, and casts the impeller with good ...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the impellers in China use a liquid casting impeller, one is a high-manganese impeller with good integrity but not wear-resistant, and the other is a high-chromium alloy impeller with 8% content, which has a certain degree of wear resistance, but the overall The performance quality is not very good, and sometimes there are cracks in the 6 squares of the main body of the impeller center, resulting in poor casting quality and low cost performance

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