阅读说明：本技术 一种提高05Cr17Ni4Cu4Nb钢力学性能的热处理方法 (Heat treatment method for improving mechanical property of 05Cr17Ni4Cu4Nb steel ) 是由 石年平 于 2021-09-10 设计创作，主要内容包括：本发明提供一种提高05Cr17Ni4Cu4Nb钢力学性能的热处理方法,该热处理方法为固溶处理+调整处理+时效硬化处理,调整处理按以下步骤完成：将固溶处理后的05Cr17Ni4Cu4Nb钢放入真空炉内,以2℃～5℃/分钟的升温速率从室温升至810℃～830℃,保温240～300分钟后出炉油冷至室温,得到调整处理后的05Cr17Ni4Cu4Nb钢。以解决传统固溶处理+时效硬化处理不能充分发挥05Cr17Ni4Cu4Nb钢优良力学性能的不足。属于沉淀硬化钢热处理技术领域。(The invention provides a heat treatment method for improving the mechanical property of 05Cr17Ni4Cu4Nb steel, which comprises the following steps of solution treatment, adjustment treatment and age hardening treatment: and (3) putting the 05Cr17Ni4Cu4Nb steel subjected to solution treatment into a vacuum furnace, heating the steel to 810-830 ℃ from room temperature at the heating rate of 2-5 ℃/min, keeping the temperature for 240-300 min, taking the steel out of the furnace, and cooling the oil to room temperature to obtain the adjusted 05Cr17Ni4Cu4Nb steel. The method solves the problem that the traditional solution treatment and age hardening treatment can not fully exert the excellent mechanical properties of the 05Cr17Ni4Cu4Nb steel. Belongs to the technical field of precipitation hardening steel heat treatment.)

1. A heat treatment method for improving the mechanical property of 05Cr17Ni4Cu4Nb steel is characterized in that: the heat treatment method comprises the steps of solution treatment, adjustment treatment and age hardening treatment, wherein the adjustment treatment is completed according to the following steps: and (3) putting the 05Cr17Ni4Cu4Nb steel subjected to solution treatment into a vacuum furnace, heating the steel to 810-830 ℃ from room temperature at the heating rate of 2-5 ℃/min, keeping the temperature for 240-300 min, taking the steel out of the furnace, and cooling the oil to room temperature to obtain the adjusted 05Cr17Ni4Cu4Nb steel.

2. The heat treatment method for improving the mechanical property of the 05Cr17Ni4Cu4Nb steel as claimed in claim 1, wherein the heat treatment method comprises the following steps: the solution treatment is completed according to the following steps: putting the 05Cr17Ni4Cu4Nb steel into a vacuum furnace, heating the 05Cr17Ni4Cu4Nb steel from room temperature to 1025-1055 ℃ at the heating rate of 6-8 ℃/min, preserving the heat for 90-120 min, and cooling the oil to the room temperature to obtain the solution-treated 05Cr17Ni4Cu4Nb steel.

3. The heat treatment method for improving the mechanical property of the 05Cr17Ni4Cu4Nb steel as claimed in claim 1, wherein the heat treatment method comprises the following steps: the age hardening treatment is completed according to the following steps: putting the 05Cr17Ni4Cu4Nb steel subjected to the solid solution treatment and the adjustment treatment into a vacuum furnace, heating to 380-400 ℃ from room temperature at the heating rate of 2-4 ℃/min, and keeping the temperature for 60-90 min; and raising the temperature to 480-500 ℃ at the heating rate of 2-4 ℃/min, keeping the temperature for 60-90 min, discharging the steel out of the furnace, and air-cooling the steel to room temperature to obtain the age-hardened 05Cr17Ni4Cu4Nb steel.

Technical Field

The invention relates to a heat treatment method of 05Cr17Ni4Cu4Nb steel, in particular to a heat treatment method for improving the mechanical property of 05Cr17Ni4Cu4Nb steel, and belongs to the technical field of heat treatment of precipitation hardening steel.

Background

The 05Cr17Ni4Cu4Nb steel is martensite precipitation hardening steel, and is widely applied to the fields of aerospace, aviation, nuclear power and the like due to high strength, high hardness and better corrosion resistance; at present, the common heat treatment process of 05Cr17Ni4Cu4Nb steel is solution treatment and age hardening treatment; after the 05Cr17Ni4Cu4Nb steel is subjected to solution treatment and age hardening treatment, the tensile strength can reach 1310MPa, the yield strength can reach 1180MPa, the elongation can reach 10%, and the end face shrinkage can reach 40%.

Disclosure of Invention

The invention aims to provide: provides a heat treatment method for improving the mechanical property of 05Cr17Ni4Cu4Nb steel, which aims to solve the problem that the excellent mechanical property of the 05Cr17Ni4Cu4Nb steel cannot be fully exerted by the traditional solution treatment and age hardening treatment.

In order to achieve the purpose, a heat treatment method for improving the mechanical property of the 05Cr17Ni4Cu4Nb steel is adopted, wherein the heat treatment method comprises the steps of solution treatment, adjustment treatment and age hardening treatment, and the adjustment treatment is completed according to the following steps: and (3) putting the 05Cr17Ni4Cu4Nb steel subjected to solution treatment into a vacuum furnace, heating the steel to 810-830 ℃ from room temperature at the heating rate of 2-5 ℃/min, keeping the temperature for 240-300 min, taking the steel out of the furnace, and cooling the oil to room temperature to obtain the adjusted 05Cr17Ni4Cu4Nb steel.

In the method, the solution treatment is completed according to the following steps: putting the 05Cr17Ni4Cu4Nb steel into a vacuum furnace, heating the 05Cr17Ni4Cu4Nb steel from room temperature to 1025-1055 ℃ at the heating rate of 6-8 ℃/min, preserving the heat for 90-120 min, and cooling the oil to the room temperature to obtain the solution-treated 05Cr17Ni4Cu4Nb steel;

in the method, the age hardening treatment is completed according to the following steps: putting the 05Cr17Ni4Cu4Nb steel subjected to the solid solution treatment and the adjustment treatment into a vacuum furnace, heating to 380-400 ℃ from room temperature at the heating rate of 2-4 ℃/min, and keeping the temperature for 60-90 min; and raising the temperature to 480-500 ℃ at the heating rate of 2-4 ℃/min, keeping the temperature for 60-90 min, discharging the steel out of the furnace, and air-cooling the steel to room temperature to obtain the age-hardened 05Cr17Ni4Cu4Nb steel.

Compared with the prior art, after the solid solution treatment, the adjustment treatment and the age hardening treatment, the tensile strength of the steel reaches 1605MPa to 1660MPa, the yield strength reaches 1422MPa to 1518MPa, the elongation is 15 to 18 percent, the end face shrinkage is 52 to 54 percent, the mechanical property of the 05Cr17Ni4Cu4Nb steel is obviously improved, and the excellent mechanical property of the 05Cr17Ni4Cu4Nb steel is more fully exerted.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below, and it should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

Examples

The embodiment provides a heat treatment method for improving the mechanical properties of 05Cr17Ni4Cu4Nb steel, which comprises the following specific steps:

solution treatment: putting the 05Cr17Ni4Cu4Nb steel into a vacuum furnace, heating the 05Cr17Ni4Cu4Nb steel from room temperature to 1025-1055 ℃ at the heating rate of 6-8 ℃/min, preserving the heat for 90-120 min, and cooling the oil to the room temperature to obtain the solution-treated 05Cr17Ni4Cu4Nb steel;

and (3) adjusting: and (3) putting the 05Cr17Ni4Cu4Nb steel subjected to solution treatment into a vacuum furnace, heating the steel to 810-830 ℃ from room temperature at the heating rate of 2-5 ℃/min, keeping the temperature for 240-300 min, taking the steel out of the furnace, and cooling the oil to room temperature to obtain the adjusted 05Cr17Ni4Cu4Nb steel.

And (3) age hardening treatment: putting the 05Cr17Ni4Cu4Nb steel subjected to the solid solution treatment and the adjustment treatment into a vacuum furnace, heating to 380-400 ℃ from room temperature at the heating rate of 2-4 ℃/min, and keeping the temperature for 60-90 min; and raising the temperature to 480-500 ℃ at the heating rate of 2-4 ℃/min, keeping the temperature for 60-90 min, discharging the steel out of the furnace, and air-cooling the steel to room temperature to obtain the age-hardened 05Cr17Ni4Cu4Nb steel.

After the solution treatment, the adjustment treatment and the age hardening treatment are carried out in the embodiment, multiple experiments prove that after the treatment, the tensile strength can reach 1605MPa to 1660MPa, the yield strength can reach 1422MPa to 1518MPa, the elongation can reach 15% to 18%, the end face shrinkage can reach 52% to 54%, and the mechanical property of the 05Cr17Ni4Cu4Nb steel is remarkably improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.