Precision-casting wax pattern material based on Fischer-Tropsch wax and preparation method thereof

Abstract

The invention discloses a precision-casting wax pattern material based on Fischer-Tropsch wax and a preparation method thereof. The precision-casting wax pattern material comprises a basic component. The basic component comprises the following raw materials in percentage by mass: 10-50% of paraffin, 5-20% of Fischer-Tropsch wax, 10-50% of stearic acid, 5-30% of petroleum resin and 0-10% of lignite wax. The preparation method comprises the following steps: uniformly mixing and stirring all the raw materials under heating conditions to obtain a transparent liquid, performing filtering, and performing molding. The precision-casting wax disclosed by the invention has the advantages of moderate softening point, very low penetration degree, low linear shrinkage ratio, higher bending strength and low ash content, and can be widely used for preparing wax patterns of high-precision aviation casting structural parts and wax patterns for other precision casting purposes.

Description

technical field [0001] The invention relates to a Fischer-Tropsch wax-based precision casting wax mold material and a preparation method thereof. Background technique [0002] Investment casting, also known as investment casting, is a metal forming process. Each casting made by investment casting is the result of the cooperation of various processes, various materials, and many technologies. The general process of investment casting can be divided into: design and manufacture of molds that meet the size requirements; manufacture wax molds that meet various physical and chemical properties through appropriate molds; repeatedly coat several layers of refractory materials on the surface of wax molds; Dewaxing with high-temperature steam and hot water removes all the wax from the refractory material to form an empty shell; pouring liquid metal into the empty shell; finally cooling, shelling and cleaning of the casting. Wherein, the wax removed by the high temperature can also b...

AI Technical Summary

Problems solved by technology

Most of the mold materials on the market often have the following problems when preparing the above-mentioned thick and large integral precision structural parts: 1) Due to the large shrinkage rate of the thick part of the wax mold, it is impossible to obtain a model of precise scale; 2) The surface finish of the wax mold Not high, wettability is not good, resulting in easy to form concave-convex, pitted surface on the inside of the prepared refractory mold

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