Preparation method of alloy mold with heat resistance stability and impact resistance

Abstract

The invention belongs to the technical field of alloy mold preparation, and particularly relates to a preparation method of an alloy mold with heat resistance stability and impact resistance. The preparation method comprises the steps of alloy matching, smelting, forging and annealing, H2-H2O atmosphere treatment and nanocrystallization treatment. Compared with the prior art, the preparation method has the following beneficial effects that the comprehensive service performance and service behavior of an alloy material can be improved through treatment in the H2-H2O atmosphere; under the low temperature condition, through small-grain-size steel shot impacting, dynamic recovery and recrystallization happen to an obtained nanolayer in the forming process; hardness distribution of the cross section metallographic structure and hardness distribution from the surface to a matrix are in changes of gradient, and the surface layer hardness reaches up to 3 times of the matrix or above; the heatresistance and corrosion resistance of an obtained product are both improved; the special use requirements of large loads and the long service life under the high temperature environment can be met; the service life of the mold can be prolonged; in the whole preparation process, conditions are easy to control; the thickness of a nitride effective infiltrated layer is remarkably increased; and thepreparation method is suitable for being popularized.

Description

technical field [0001] The invention belongs to the technical field of alloy mold preparation, and in particular relates to a method for preparing a heat-resistant, stable and impact-resistant alloy mold. Background technique [0002] At present, many parts of electronic products and automobiles are produced through molds. As an important element in the field of mechanical processing, molds have increasingly become the first choice for products and parts processing due to their advantages in production and processing costs. Molds It is a tool used to shape products or parts. According to the different shaped products, molds are divided into metal molds and non-metal molds; and according to the materials used to manufacture the molds, the molds are divided into sand molds, metal molds, Paraffin molds, plastic molds, etc.; the metal materials used to make metal molds are usually alloys, such as nickel-nickel-chromium alloy steel. [0003] As we all know, the production cycle ...

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Problems solved by technology

[0003] As we all know, the production cycle of the alloy mold is usually long, the cost is high, and the service life is short. Therefore, when a large number of products or parts are required to be formed, the alloy mold needs to be frequently repaired or re-opened, resulting in the production of the alloy mold. The increase in the production cost of products or parts is not conducive to improving the market competitiveness of products or parts. In the prior art, the QPQ metal is nanometerized by metal, and the compound depth of the nanometerization process is increased on the basis of retaining the original ordinary nitriding technology. It can greatly improve the wear resistance, corrosion resistance and mechanical properties of the metal surface. The existing nitriding technology has certain limitations. The depth of the compound layer is too shallow to bear the load and cannot withstand greater wear. At the same time, the existing products also put forward higher requirements for alloy molds, therefore, further research and improvement of alloy molds are needed