The Process Method of Quickly and Directly Manufacturing Hot Work Die
A technology of hot work mold and process method, which is applied in the field of mold making materials and mold making, can solve the problems of easy cracking and low coefficient of linear expansion of alloy powder.
Active Publication Date: 2020-06-26
NANJING TECH UNIV
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Problems solved by technology
The mold generally has high strength and high hardness. If the mold is directly made of high-hardness alloy powder through additive manufacturing, due to the continuous heat input during the printing process, excessive thermal stress and high-hardness alloy powder will be formed between each layer. The low coefficient of linear expansion leads to cracking easily during the preparation process.
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[0021] In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.
[0022] Aspects of the invention are described in this disclosure with reference to the accompanying drawings, which show a number of illustrated embodiments. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of numerous ways, since the concepts and embodiments disclosed herein are not limited to any implementation. In addition, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.
[0023] According to an embodiment of the present invention, the present invention discloses a low-cost process for rapidly a...
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Abstract
The invention provides a process method for quickly manufacturing hot-working molds, using laser additive manufacturing technology to rapidly form geometric features of molds, and at the same time aiming at the performance of molds, that is, the characteristics of high temperature resistance, wear resistance, high hardness, and high strength, laser additive manufacturing is used to rapidly cool and sharpen The characteristics of thermal rapid solidification, mixing low-hardness iron-based alloy powder with a certain amount of high-hardness iron-based alloy powder, using additive manufacturing technology to minimize the precipitation of reinforced phases and retain the characteristics of low-hardness alloys, reducing the mold printing process Due to the low hardness and linear expansion coefficient of the material itself, as well as cracking and other problems caused by excessive thermal stress, it can be formed without defects. Finally, the strengthening phase in the mixed high-hardness iron-based alloy in the deposited state is precipitated by heat treatment technology to achieve the performance of the mold.
Description
technical field [0001] The invention belongs to the field of additive manufacturing and material processing, and relates to mold manufacturing technology, in particular to a process method for making mold manufacturing materials. Background technique [0002] Since the 1980s, my country's mold industry has developed rapidly, and the annual consumption of molds is nearly 10 billion yuan. The mold industry is the basic industry of the national economy, and the level of mold production technology is an important symbol to measure the level of a country's manufacturing. At present, the service life of domestically manufactured molds is only 1 / 2-1 / 5 of that of imported molds, and large, complex and important high-end mold steels are still imported from abroad. Therefore, the development of high-life mold steel with independent intellectual property rights has significant economic and social benefits. [0003] Additive Manufacturing (Additive Manufacturing) is also known as 3D p...
Claims
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IPC IPC(8): B22F3/105B22F3/24C21D1/30C21D1/773C22C38/44C22C38/34C22C38/54C22C38/46C22C38/04B33Y10/00B33Y70/00B33Y80/00
CPCB22F3/24C21D1/30C21D1/773C22C38/44C22C38/34C22C38/54C22C38/46C22C38/04B33Y10/00B33Y70/00B33Y80/00B22F2003/248B22F2003/247B22F10/00B22F10/66B22F10/34B22F10/28B22F10/36B22F10/64B22F10/322Y02P10/25
Inventor 李峰张华健孙中刚常辉
Owner NANJING TECH UNIV