High melting metal liquid die forging paint, producing and using method thereof

A high-melting-point metal and liquid die forging technology, applied in metal processing equipment, coating, manufacturing tools, etc., can solve the problem of low die life

Inactive Publication Date: 2008-10-29
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low die life in liquid die forging of high melting point alloys, and to provide a coating for effective protection of the die for liquid die forging of high melting point metals and its preparation and use method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] High melting point metals include: ZGMn13, high chromium cast iron, ordinary steel, etc.

[0024] A coating for ZGMn13 liquid die forging, which consists of two layers of coatings, the bottom layer and the surface layer. The two-layer paint consists of a base material with a particle size of 200-500 mesh, a carrier, a binder, a suspending agent, and a defoamer.

[0025] The primer is diatomite treated with capacity expansion, the suspending agent is a mixture of sodium bentonite and CMC sodium salt; the binder is a mixture of water glass and sodium hexametaphosphate, the carrier is tap water, and the defoamer is n-butanol.

[0026] Choose 3 kinds of ratios (quality) that meet the requirements for the primer:

[0027] (1) 100 parts of base material, 0.1 part of suspending agent, 2 parts of binder, and 100 parts of carrier. 0.01 part of defoamer. Wherein the mass ratio of sodium bentonite and CMC sodium salt in the suspending agent is 2:1, and the mass ratio of water g...

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PUM

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Abstract

The invention discloses a high-melting metal liquid die forging coating, a preparation method and a using method thereof, which can effectively solve the problem of short service life of a high-melting metal liquid die forging die. A bottom layer and a surface layer are consists of 100 portions of 200-500 mesh matrix, 100-300 portions of carrier, 2-25 portions of a cementing agent, 0.1-25 portions of suspending agent and 0.01-0.05 portion of foam suppressor. The matrix of the surface layer coating is forsterite or chromite, while the matrix of the bottom layer coating is processed diatomite. The suspending agent is the mixture of sodium bentonite and CMC sodium salt. The cementing agent of the surface layer coating is the mixture of aluminum phosphate and sodium hexametaphosphate, while the cementing agent of the bottom layer coating is the mixture of soluble glass and sodium hexametaphosphate. The components are evenly blended according to the proportion and stand for 3-8 hours to be ready for use. When in use, the bottom layer coating is coated on the surface of a metal die which is preheated to the temperature of 150-300 DEG C; after drying, the surface layer coating is coated on the bottom layer coating, and then liquid die forging is carried out after drying.

Description

technical field [0001] The invention relates to a coating for liquid die forging or squeeze casting high melting point metal and its preparation and application method. Background technique [0002] Liquid die forging (also known as squeeze casting) is a near-net-shape high-quality casting production technology. When this technology is used for high-melting-point metals such as steel, due to the high temperature and high forming pressure of the metal melt, the mold often welds and deforms, resulting in abnormal damage to the mold, which affects the promotion of liquid forging of steel materials. application. In order to solve this problem and improve the life of the mold, people have used advanced mold materials, and even made molds with high-temperature alloys. Although there has been some improvement, the life of the mold is still a limiting link in popularization and application. Using paint to protect the mold is a simple and feasible technical route to improve the lif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 邢书明姚淑卿刘华斌张密兰鲍培玮张励忠
Owner BEIJING JIAOTONG UNIV
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