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

1000 Mpa grade high-strength metastable austenite-martensite stainless steel

A martensitic stainless steel, high-strength technology, applied in the field of stainless steel manufacturing, can solve the problems of high production cost, high material alloy cost, and limited development, and achieve low processing cost, excellent comprehensive performance of strength and toughness, and improved strength and toughness Effect

Active Publication Date: 2019-06-14
福建青拓特钢技术研究有限公司
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Maraging steel contains a large amount of expensive alloying elements such as Ni, Cu, Mo, Co, etc., and the material alloy cost is high; and stainless steel aging treatment, high production cost and other factors limit its development

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
  • 1000 Mpa grade high-strength metastable austenite-martensite stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) A 1000MPa grade high-strength metastable austenitic-martensitic stainless steel, having the following mass percentage components:

[0042] C: 0.06%; Si: 0.38%; Mn: 3.68%; Cr: 14.42%; Ni: 2.72%; P: 0.036%; S: 0.0015%; N: 0.11%; Mo: 0.30%; inevitable impurity elements.

[0043] (2) The preparation method of the above-mentioned 1000MPa grade high-strength metastable austenitic-martensitic stainless steel specifically includes: selecting molten iron from a blast furnace or an electric furnace, and performing alloying treatment to meet the requirements for dominant alloying elements. Then in the AOD process, nitrogen-oxygen mixed gas is introduced to decarburize the molten steel and accurately control nitrogen, and then adjust the content of alloying elements to meet the control requirements for the content of alloying elements. After refining in the LF furnace, it is continuously cast into slabs, square billets or round billets. Subsequently, it is hot rolled into she...

Embodiment 2

[0046] (1) A 1000MPa grade high-strength metastable austenitic-martensitic stainless steel, having the following components by mass percentage: C: 0.066%; Si: 0.40%; Mn: 4.05%; Cr: 14.3%; Ni: 2.75%; P: 0.040%; S: 0.0015%; N: 0.11%, Mo: 0.25%; V: 0.15%, the balance being Fe and inevitable impurity elements.

[0047] (2) The manufacturing method is as in Example 1. The properties of the obtained 1000MPa grade high-strength metastable austenitic-martensitic stainless steel are as follows: the tensile strength is 1384MPa, the yield strength is 1055MPa, the elongation is 18%, and the impact toughness is 18%. For (V-notch) 85J / cm 2 .

Embodiment 3

[0049] (1) A 1000MPa grade high-strength metastable austenitic-martensitic stainless steel, having the following components by mass percentage: C: 0.064%; Si: 0.45%; Mn: 4.5%; Cr: 14.1%; Ni: 2.8%; P: 0.040%; S: 0.0051%; N: 0.098%; Mo: 0.2%; V: 0.15%; Ti: 0.1%, the balance being Fe and inevitable impurity elements.

[0050] (2) The manufacturing method is as in Example 1. The properties of the obtained 1000MPa grade high-strength metastable austenitic-martensitic stainless steel are as follows: the tensile strength is 1338MPa, the yield strength is 1085MPa, the elongation is 20.1%, and the impact toughness is 20.1%. (V-notch) is 95J / cm 2 .

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

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Yield strengthaaaaaaaaaa
Room temperature impact toughnessaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of stainless steel manufacturing, in particular to 1000 Mpa grade high-strength metastable austenite-martensite stainless steel. The 1000 Mpa grade high-strength metastable austenite-martensite stainless steel is prepared from the following components in percentage by mass: 0.03%-0.1% of C, 0.2%-1.0% of Si, 3.0%-5.0% of Mn, 13.0%-15.5% of Cr, 1.0%-3.0%of Ni, greater than or equal to 0.2% and less than or equal to 0.6% of Mo, less than or equal to 0.045% of P, less than or equal to 0.030% of S, 0.05%-0.15% of N, less than or equal to 0.30% of Ti, less than or equal to 0.30% of Nb, less than or equal to 0.3% of V, and the balance of Fe and inevitable impurity elements. The 1000 Mpa grade high-strength metastable austenite-martensite stainless steel has the beneficial effects that compared with traditional high-strength Cr13 series of martensite stainless steel, the intensity and toughness comprehensive performance is more excellent, and the corrosion resistance is high; and compared with martensite precipitation-hardening stainless steel, the machining difficulty is low, and the alloy and the manufacturing cost both have obvious advantages.

Description

technical field [0001] The invention belongs to the technical field of stainless steel manufacturing, and in particular relates to a 1000Mpa-grade high-strength metastable austenitic-martensitic stainless steel. Background technique [0002] Martensitic stainless steel has the characteristics of good corrosion resistance and high hardness, strength and wear resistance, and is widely used in metal structural materials, such as construction, aviation and machinery manufacturing. Martensitic stainless steel is usually quenched to obtain a martensitic structure with high dislocation density, and then tempering to eliminate internal stress, reduce dislocation density, and obtain a uniform and stable tempered martensite structure, thereby obtaining plasticity, A combination of toughness and strength. Martensitic stainless steel can be divided into martensitic chromium stainless steel and martensitic chromium-nickel stainless steel according to the characteristics of chemical comp...

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): C22C38/58C22C38/44C22C38/02C21D1/18
Inventor 姜海洪蒋一江来珠邹文辉周庆龙姜美雪
Owner 福建青拓特钢技术研究有限公司
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