Process for preparing steel-based die by spraying

Abstract

The invention provides a process for preparing a steel-based die by spraying. The process for preparing the steel-based die by spraying includes the steps that firstly, a rapid prototyping is prepared; secondly, an intermediate type is prepared; and thirdly, the die is prepared in a spraying manner. The process for preparing the steel-based die by spraying has the following beneficial effects thatarc spraying and the rapid prototyping technology are combined, and the steel-based drawing die is successfully prepared; in the process of the preparing the die in the spraying manner, preparation of a ceramic model is the most critical technical link. Al2O3 ceramic powder is adopted and is matched with a proper sintering process, and the ceramic intermediate type with the strength and the sizeprecision both meeting requirements is prepared; and 3Cr13 martensitic stainless steel and 65Mn, 70, 82B high-carbon steel are adopted, by controlling the cooling speed of a deposition layer, a spraying deposition layer with a martensitic structure is obtained, and by means of phase change expanding of martensite, volume shrinkage during cooling is effectively counteracted.

Description

technical field [0001] The invention relates to the field of preparing steel-based molds by spraying, in particular to a process for preparing steel-based molds by spraying. Background technique [0002] In 1940, the TAFA company in the United States successfully used arc spraying zinc alloy coating to make a mold for plastic interior parts. The high-temperature particles generated by spraying directly deposited the mold surface on the plaster model, which greatly improved the mold manufacturing cost and production cycle. significantly reduced. [0003] However, until the 1990s, this technology could not be used in the manufacture of steel-based molds. This is due to the high temperature of the sprayed steel particles and the large shrinkage force generated during cooling, which can easily cause burning and damage of the master mold material. Destruction, so that the replication performance of the profile cannot be guaranteed. In 1993, SprayformTools&Dies, Ltd. of the Unit...

AI Technical Summary

Problems solved by technology

[0003] However, until the 1990s, this technology could not be used in the manufacture of steel-based molds. This is due to the high temperature of the sprayed steel particles and the large shrinkage force generated during cooling, which can easily cause burning and damage of the master mold material. Destruction, so that the reproduction performance of the profile cannot be guaranteed