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

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...