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High-performance 17-4ph stainless steel material and its high-pressure heat treatment method, manufacturing method and application

A heat treatment method, stainless steel technology, which is applied in the field of heat treatment of metal materials, can solve the problems of low production efficiency and long time consumption, and achieve the effects of improving production efficiency, good comprehensive mechanical properties, and improving comprehensive mechanical properties

Active Publication Date: 2022-01-04
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-pressure heat treatment method for 17-4PH stainless steel to solve the residual pores in the existing 17-4PH stainless steel parts, and because it must be completed in different furnaces, it takes a long time and the production efficiency is low. lower question

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  • High-performance 17-4ph stainless steel material and its high-pressure heat treatment method, manufacturing method and application
  • High-performance 17-4ph stainless steel material and its high-pressure heat treatment method, manufacturing method and application
  • High-performance 17-4ph stainless steel material and its high-pressure heat treatment method, manufacturing method and application

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preparation example Construction

[0040] The preparation method of a kind of high-performance 17-4PH stainless steel material that the embodiment of the present invention provides, comprises:

[0041] 17-4PH stainless steel material is obtained by additive manufacturing;

[0042] Then, the 17-4PH stainless steel material is heat-treated using the high-pressure heat treatment method for the 17-4PH stainless steel material provided in the embodiment of the present invention.

[0043] The high-performance 17-4PH stainless steel material provided by the embodiment of the present invention or prepared by the method provided by the embodiment has good comprehensive mechanical properties and can be widely used in aerospace, petrochemical, nuclear industry and other fields.

Embodiment 1

[0046]A high-pressure heat treatment method for 17-4PH stainless steel material, comprising the following steps:

[0047] High-pressure solution treatment: place the 17-4PH stainless steel material obtained by additive manufacturing in a hot isostatic pressing cylinder, and under the condition of an initial pressure of 30MPa, increase the temperature and pressurize at the same time, the heating rate is 20°C / min, and heat to 1040 ℃, while increasing the air pressure of the cylinder to 150MPa, heat preservation and pressure holding for 2 hours; then cool down to 480℃ at a cooling rate of 1000℃ / min under high pressure;

[0048] High-pressure aging treatment: heat preservation at 480°C for 4 hours, then cool to room temperature at 1000°C / min under high pressure;

[0049] Among them, during the high-pressure solid solution and high-pressure aging treatment of 17-4PH stainless steel materials, the samples are always placed in the hot isostatic pressing cylinder, and the cylinder pre...

Embodiment 2

[0052] A high-pressure heat treatment method for 17-4PH stainless steel material, comprising the following steps:

[0053] High-pressure solution treatment: place the 17-4PH stainless steel material obtained by additive manufacturing in a hot isostatic pressing cylinder, and under the condition of an initial pressure of 30MPa, increase the temperature and pressurize at the same time, the heating rate is 20°C / min, and heat to 1040 ℃, at the same time, the air pressure of the cylinder is increased to 150MPa, and the temperature is maintained for 2 hours; then the temperature is lowered to 480℃ at a cooling rate of 10℃ / min under high pressure;

[0054] High-pressure aging treatment: heat preservation at 480°C for 8 hours, then cool to room temperature at 1000°C / min under high pressure;

[0055] Among them, during the high-pressure solid solution and high-pressure aging treatment of 17-4PH stainless steel materials, the samples are always placed in the hot isostatic pressing cylin...

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Abstract

The invention relates to the technical field of heat treatment of metal materials, and discloses a high-performance 17‑4PH stainless steel material, a high-pressure heat treatment method, a manufacturing method and an application thereof. The high-pressure heat treatment method for 17-4PH stainless steel materials includes: keeping the 17-4PH stainless steel materials obtained by additive manufacturing under the conditions of 1000-1100 °C and at least 140 MPa for at least 100 minutes, and then cooling down to 450-550 °C for 1-20 minutes. Cool to room temperature after 8 hours, and control the air pressure in the cooling process above 100MPa. High-performance 17-4PH stainless steel material, obtained by the above-mentioned heat treatment method. The material has good comprehensive mechanical properties and is suitable for application in aerospace, petrochemical and nuclear industries. The preparation method of the high-performance 17-4PH stainless steel material includes: adopting additive manufacturing to obtain the 17-4PH stainless steel material; and then performing heat treatment by the above-mentioned heat treatment method.

Description

technical field [0001] The invention relates to the technical field of heat treatment of metal materials, in particular to a high-performance 17-4PH stainless steel material and its high-pressure heat treatment method, manufacturing method and application. Background technique [0002] 17-4PH (0Cr 17 Ni 4 Cu 4 Nb) is a martensitic precipitation hardening stainless steel with good comprehensive properties such as strength, toughness, plasticity and corrosion resistance. Therefore, it has been widely used in aerospace, petrochemical, nuclear industry and other fields. With the development of additive manufacturing technology, 17-4PH stainless steel has gained wide attention in the fields of conformal cooling molds and other fields. However, to obtain excellent comprehensive mechanical properties, 17-4PH stainless steel must undergo appropriate heat treatment. At present, the heat treatment system for this type of stainless steel mainly includes solution and aging treatment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D7/13C21D1/78C21D6/00
CPCC21D7/13C21D1/78C21D6/00
Inventor 施麒秦奉刘辛
Owner GUANGDONG INST OF NEW MATERIALS
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