A large-scale hot forging die with a fist-like bionic structure and its manufacturing method

Abstract

The invention discloses a fist type large-scale hot-forging die with a bionic structure, and a manufacturing method thereof. A transition layer, a strengthened layer and a skin layer are sequentiallyformed on a die matrix; the transition layer and the strengthened layer are jointly used as a bone layer to play a role in structure supporting; the skin layer is used as a die cavity surface layer contacting a forging piece and has wear resistance and deformation resistance under a high-temperature heavy load condition; at the normal temperature, the strength and the hardness of the die matrix, the transition layer and the strengthened layer are sequentially increased progressively, and the strength and the hardness of the skin layer are smaller than the strength and the hardness of the strengthened layer; and the strength and the hardness of the skin layer is not reduced obviously under a hot-forging working condition (below 650 DEG C). The skin layer is a cobalt-based or nickel-based high-temperature alloy welding material. According to the die, the occurrence of the problems such as surface layer cracks and difficulty in machining brought by high surface hardness are effectively reduced, meanwhile, a use performance of the large-scale forging die under the high-temperature heavy load working condition is further effectively improved, and the fist type large-scale hot-forging die with the bionic structure has favorable wear resistance and deformation resistance at the high temperature.

Description

technical field [0001] The invention relates to a large-scale hot forging die, in particular to a large-scale hot forging die with a fist-type bionic structure and a multi-material additive manufacturing method thereof, belonging to the technical field of dies. Background technique [0002] With the rapid development of my country's aerospace, nuclear power, petrochemical and other national strategic demand fields, the demand for large-scale, integrated and precise high-performance key components is increasing. A major landmark achievement in my country's machinery industry, the world's largest die forging hydraulic press (800MN die forging press) came into being. Since the press was put into use, it has played an irreplaceable role in the forging and forming process of large-scale key components in national key fields. The forging materials mainly include aluminum alloys, high-temperature alloys, titanium alloys, etc. The ultra-large forging dies used not only face the pro...

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Problems solved by technology

[0005] In view of the above-mentioned shortcomings in the prior art, that is, the surface layer of the forging die manufactured according to the idea of ​​increasing the hardness gradient of each layer is easy to deform and crack under high temperature and high pressure, and there are problems in processing. The purpose of the present invention is to propose a fist-type bionic structure A large-scale hot forging die and its manufacturing method. This die effectively reduces the problems of surface cracks and difficulty in machining caused by high surface hardness, and at the same time effectively improves the performance of large-scale forging dies under high-temperature and heavy-load conditions. It has good High temperature wear resistance and deformation resistance

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