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Preparation method for automobile charging turbine

A technology for supercharged turbines and automobiles, which is applied to manufacturing tools, casting and molding equipment, metal processing equipment, etc., can solve problems such as large environmental pollution and difficulty in recycling molding sand, achieve easy availability of raw materials, reduce supercharged turbine blowhole defects, increase The effect of yield

Inactive Publication Date: 2016-06-01
青岛博泰美联化工技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, ceramic sand is often used in the production process of investment precision casting. The mold shell broken after casting has difficulty in recycling the mold sand and the problem of serious environmental pollution. Therefore, it is very important to find a high-performance and environmentally friendly mold shell preparation method. Needed

Method used

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Embodiment Construction

[0013] The present invention will be further described below in combination with specific embodiments.

[0014] (1) Prepare the mold shell, including: a. Prepare corresponding wax molds, pouring systems, risers according to the shape of the turbocharger to be obtained, and bond them into wax molds; b. Adopt suitable proportioning zircon powder, Silica sol, fine wood chips, n-octanol, and cobalt aluminate are mixed and stirred to prepare the surface coating. After coating the wax model, the surface sand is made of aluminum oxide sand and fine wood chips. c. Mix and stir stick clay powder, mullite powder, crop straw fiber, and ethyl silicate hydrolyzate to prepare the back layer paint, coat the wax mold set, hang the back sand, repeat the hanging back sand several times, seal the slurry and dry, d. The wax is roasted to obtain the mold shell.

[0015] (2) Alloy batching, the chemical composition of the alloy according to atomic percentage includes: Al: 40.0-43.0 at%, V: 0.6-1.3...

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Abstract

The invention discloses a preparation method for an automobile charging turbine. The preparation method comprises the steps of preparing a mould shell, batching an alloy, smelting and casting, cooling, carrying out after-treatment and the like. According to the preparation method, a TiAl-based titanium-aluminum compound is used as a charging turbine material, so that the charging turbine can continuously work for a long time at a high temperature, the performances of the charging turbine are improved, and the service life of the charging turbine is prolonged; fine sawdust and crop straw fibers are adopted as shell-making materials, so that use of refractory matters is reduced, and therefore, the preparation method is beneficial for environmental protection; and a reasonable proportion is adopted, gas permeability is increased on the premise of ensuring shell strength, and a porous material, namely attapulgite is adopted, so that gas exhaustion is facilitated, blowhole defects of the charging turbine are reduced, the yield is increased, and the weight of the mould shell is reduced.

Description

technical field [0001] The invention belongs to the technical field of metal investment precision casting, and in particular relates to a method for preparing an automobile turbocharger. Background technique [0002] Mold investment casting is an advanced casting forming process, which is mostly used to realize complex, thin-walled, precision turbocharged turbo forming. It has great advantages in precision jewelry, aero-engines and other precision molded parts. The traditional investment precision casting process It is a fusible model (referred to as investment model) made of fusible materials (such as wax), coated with several layers of special refractory coatings, dried and hardened to form a whole module, and then removed from the module. The method of melting the molten mold to obtain a hollow mold shell, then sintering the mold shell at high temperature, and finally pouring molten metal into it to obtain a turbocharger. At present, ceramic sand is mostly used in the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C9/28B22C1/00B22C3/00C22C14/00C23C30/00
CPCB22C1/00B22C3/00B22C9/04B22C9/28C22C14/00C23C30/00
Inventor 刘全英陈隽颖
Owner 青岛博泰美联化工技术有限公司
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