Cast steel matrix for process for preparing forging mould through double-layer build-up welding and preparation method thereof

Abstract

The invention discloses a cast steel matrix for a process for preparing a forging mould through double-layer build-up welding and a preparation method thereof. The cast steel matrix is prepared from the following materials in percentage by element content: 0.2-0.35% of carbon, 0.1-0.5% of silicon, 1.0-1.8% of manganese, not more than 0.01% of phosphorus, not more than 0.01% of sulfur, 0.3-0.8% of chromium, 0.1-0.8% of nickel, 0.1-0.5% of molybdenum, not more than 0.5% of copper and the balance of iron; and the cast steel matrix is obtained by a tempering after normalizing process, wherein the normalizing temperature is within 980-1020 DEG C, the tempering temperature is within 550-600 DEG C, and the thermal insulation time is determined according to the size of a mould. The cast steel matrix prepared by the method disclosed by the invention can simultaneously greatly meet performance requirements of the forging mould on hardness, strength and two aspects, such as ductility and toughness, and also has excellent welding property.

Description

technical field [0001] The invention relates to a method for preparing a forging die based on double-layer metal surfacing welding of a cast steel matrix, in particular to a cast steel matrix used in the process and a preparation method thereof. Background technique [0002] With the rapid development of my country's economic level and the great improvement of the degree of industrialization, the application of various forging dies is becoming more and more common and important. How to use less resources to produce more products with better quality will be It is a direction of industrial development, so when designing forging dies, it is necessary to comprehensively consider its performance and cost. In the prior art, various die steels are often used to manufacture forging dies. Some die steels have good comprehensive properties such as strength, hardness and toughness, which can meet the requirements of forging die working conditions, but generally have higher prices, more...

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Problems solved by technology

[0005] In the process of implementing the above method, the inventor found that the forging die made by the double-layer surfacing process was used repeatedly, and the surfacing layer of the forging die was prone to appear under the repeated impact of the die. detachment

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