Self-lubricating heterogeneous material mold for hot stamping of high-strength steel plate and preparation method thereof

Abstract

The invention discloses a self-lubricating heterogeneous material die for hot stamping of a high-strength steel plate. The self-lubricating heterogeneous material die comprises a base body, a supporting layer, an intensified thermal insulating layer and a self-lubricating layer which are arranged in sequence, wherein the base body is made of hot work die steel; the supporting layer is made of austenitic heat-resistance steel or stainless steel electrodes; the supporting plate is arranged on the base body in a surfacing mode; the intensified thermal insulating layer is made of a metal-based ceramic material prepared by mixing tungsten carbide or chromium carbide powder and self-melting alloy powder; the intensified thermal insulating layer is arranged on the supporting layer through the powder plasma spray-welding technology in a surfacing mode; the self-lubricating layer is made of a mixture of lubricating phases, bonding phases and hard phases; and the self-lubricating layer forms a coating on the intensified thermal insulating layer through a powder metallurgy sintering method. The self-lubricating heterogeneous material die for hot stamping of the high-strength steel plate, provided by the invention, meets the performance requirements for the hot stamping die in the hot stamping process of the high-strength steel plate.

Description

technical field [0001] The invention relates to the technical field of stamping dies, in particular to a self-lubricating heterogeneous material die for hot stamping of high-strength steel plates and a preparation method thereof. Background technique [0002] With the rapid development of the automobile industry and the intensification of energy shortages and environmental pollution, automobile energy conservation and emission reduction has become an important issue that countries and many automobile companies around the world need to solve. Since the energy consumption of automobiles is closely related to the weight of the body, the lightweight of the body has become a key technology in the body manufacturing industry. High-strength steel has good formability, high strength and excellent collision ability, which can reduce the weight of the car body and improve the safety performance of the car body. The use of high-strength steel plates in the car body ensures the safety ...

AI Technical Summary

Problems solved by technology

However, the material selection of the mold structure coating described in the above two documents is a material with relatively stable chemical properties, which is mainly aimed at the problem of high temperature oxidation of the mold during the working process. The main shortcomings are: (1) Coating comparison Thin, easy to damage under high temperature and heavy load conditions, affecting its integrity and accelerating damage; (2) Using spraying technology to connect multiple materials, the bonding strength is not enough, causing the coating to fall off easily; (3) The base material is made of large Volumetric high-temperature materials, it is difficult to rationally utilize materials

Moreover, for the thermal-mechanical coupling shock problem of the widely used high-strength steel plate hot stamping process, the effect of this scheme is limited

Images