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

A high-strength high-elongation high-alloy steel and its manufacturing method

A high-elongation, high-alloy steel technology, applied in the field of high-alloy steel, to achieve the effect of small expansion coefficient and excellent resistance to high temperature oxidation and corrosion

Active Publication Date: 2017-10-31
BAOSHAN IRON & STEEL CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] It can be seen from Table 1 and Table 2 that some nickel-based corrosion-resistant alloys in the prior art cannot fully meet the current use and manufacturing requirements, and it is necessary to develop a nickel-based corrosion-resistant high-temperature alloy with high strength, good creep performance, and economical production. alloy

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
  • A high-strength high-elongation high-alloy steel and its manufacturing method
  • A high-strength high-elongation high-alloy steel and its manufacturing method
  • A high-strength high-elongation high-alloy steel and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0067] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0068] Refer to Table 3 for the specific ingredients of the examples of the present invention.

[0069] According to the chemical composition requirements of the steel grade of the present invention, the steel billet is smelted in an electric furnace and refined in an LF furnace, softly stirred for a period of time, then added with Al and Nb, cast by a bloom continuous casting machine, and the continuous casting slab is ground at room temperature; The billets are rough-rolled at 1150-1250°C, and then finish-rolled at 1050-1150°C to ensure a reduction rate of 60-95%.

[0070] Before hot rolling, the scale on the surface of the slab is removed first, then 5-7 passes of rough rolling (temperature range 1150-1250°C), and then 5-7 passes of finish rolling (temperature range 1050-1150°C). Annealing and pickling after hot rolling, the hot-rolled sheet is full...

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
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
creep strengthaaaaaaaaaa
Login to View More

Abstract

A high-strength and high-elongation high-alloy steel and a manufacturing method thereof, the composition mass percentage content of which is: C 0.04-0.08%, Si 0.40-1.0%, Mn 0.3-0.8%, Cr 23.0-27.0%, P≤0.035 %, S≤0.001%, Ni 35.0~39.0%, Mo 2.0~≤3.0%, W 2.0~3.0%, N≤0.020%, Al 0.05~0.12%, Nb 0.5~1.5%, the rest is Fe and unavoidable impurities , wherein, Cu+O≤0.3%, Nb / Al=10-25, Nb / N=25-75, Nb / C=10-15. The alloy steel of the present invention has a complete austenite structure, and the steel can meet the operating environment of power generation and chemical treatment devices such as bar frame heat treatment baskets, radiant tubes, heat exchangers, waste combustion furnaces, etc., and has relatively high strength (yield strength ≥ 375MPa; Tensile strength ≥ 735MPa), good processing and forming properties (elongation ≥ 51%) and 870 ° C creep strength ≥ 35MPa (1%, 10000h), and the material cost is relatively low.

Description

technical field [0001] The invention belongs to the field of high-alloy steel, and mainly relates to a high-strength high-elongation high-alloy steel and a manufacturing method thereof. Background technique [0002] HR120 series high-alloy steel entered the market in the middle of last century, and its purpose is to better meet the higher requirements of corrosion resistance and heat resistance. Over the past few decades, these high-alloy steels have been widely used for their high-temperature strength, high-temperature oxidation resistance, and other high-temperature corrosion resistance properties. It is a solid-solution strengthened heat-resistant alloy with high high-temperature strength and excellent resistance to carbonization and sulfidation. The alloy can be widely used in the environment that requires high strength, good anti-carbonization and anti-sulfurization of the alloy, and has good applications in power generation and chemical treatment, such as bar-frame he...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02B22D11/111C22F1/16
Inventor 郑宏光刘旭峰蒋锡军徐荣军刘俊江
Owner BAOSHAN IRON & STEEL 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