Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Toughening-strengthening heat treatment method of high nitrogen austenitic stainless steel

A technology of high nitrogen austenite and heat treatment method, applied in the field of high nitrogen austenitic stainless steel strengthening and toughening heat treatment, can solve the problems of reducing plasticity and toughness, damaging the mechanical properties of materials, not meeting performance requirements or high quality requirements, etc. To achieve the effect of toughening or enhancing performance and improving performance

Active Publication Date: 2016-06-01
CHANGCHUN SHIYUE ENERGY SAVING MATERIAL CO LTD
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If aging treatment is adopted, after the cell reaction, a discontinuously precipitated lamellar mixture is produced, which has little effect on the yield strength and tensile strength, but greatly reduces the plasticity and toughness, which essentially damages the mechanical properties of the material. performance
Performance requirements or high quality requirements may not be met if cellular precipitation may occur during hot working due to the larger size factor of ingot parts of this material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Toughening-strengthening heat treatment method of high nitrogen austenitic stainless steel
  • Toughening-strengthening heat treatment method of high nitrogen austenitic stainless steel
  • Toughening-strengthening heat treatment method of high nitrogen austenitic stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Below in conjunction with an embodiment the present invention is further described as a case.

[0031] 1. Selection of high-nitrogen austenitic stainless steel and heat treatment process for the test

[0032] It is a high-nitrogen austenitic stainless steel after hot rolling, and its composition is 0Cr21Mn17MoNbN0.93, see Table 1.

[0033] Table 1. Chemical composition (wt%) of the steel used in the test

[0034] C Cr mn N Mo P S Si Nb Ni Fe 0.023 21.43 16.87 0.93 2.43 ≤0.012 ≤0.004 0.27 0.21 0.40 the remaining

[0035] The heat treatment technology of solid solution-aging-spheroidization was selected.

[0036] 2. Main heat treatment process parameters and tissue inspection

[0037] 2.1. The original state before the test is a hot-rolled state.

[0038] 2.2. Solution treatment, temperature 1140°C and heat preservation for 8 hours, quench the sample to obtain a single austenite structure, as shown in the attached figure 1 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the field of heat treatment technics or high nitrogen austenitic stainless steel material processing, and particularly relates to a toughening-strengthening heat treatment method of high nitrogen austenitic stainless steel. The method comprises the following steps: conducting the solid-solution treatment on a high nitrogen austenitic stainless steel material at a high-temperature area, conducting the ageing treatment on the solid-solution treated high nitrogen austenitic stainless steel material at a medium-temperature area, and conducting the spheroidizing heat treatment on the ageing-treated high nitrogen austenitic stainless steel material at a higher-temperature area, so as to dissolve and spheroidize a laminar nitride to obtain a granular nitride distributed in an austenite matrix. The toughening-strengthening heat treatment method has the advantages that the laminar structure of a cellular reaction nitride is changed, and the formed granular nitride is distributed in the austenite matrix, so that the high nitrogen austenitic stainless steel is strengthened or toughened, and the performance is improved or increased.

Description

technical field [0001] The invention relates to the technical field of heat treatment or high-nitrogen steel, in particular to a heat treatment method for strengthening and toughening high-nitrogen austenitic stainless steel, which can improve or enhance the performance of high-nitrogen austenitic stainless steel or other alloy materials. Background technique [0002] Nitrogen-alloyed high-nitrogen stainless steel, which has been widely valued by the world since the end of the 1980s, has been valued by various countries because of its nickel-saving and excellent performance, and even as a strategic structural material. [0003] Among them, high-nitrogen austenitic stainless steel, the heat treatment mainly adopts solution treatment, which can improve the strength and toughness. If aging treatment is adopted, after cell reaction, a discontinuously precipitated lamellar mixture is produced, which has little effect on yield strength and tensile strength, but greatly reduces pla...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C21D6/00
Inventor 季长涛王柏树张晓宇黄岩崔晓鹏
Owner CHANGCHUN SHIYUE ENERGY SAVING MATERIAL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com