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

NM400-level anti-crack high-strength wear-resistant steel and production method thereof

A high-strength wear-resistant steel and anti-crack technology, applied in the field of wear-resistant steel for mechanical engineering, can solve the problems of high cost of quenching and tempering heat treatment process, long production cycle, reduced alloy cost, etc., and achieve excellent welding performance and flame resistance. The effect of cutting crack sensitivity, simple manufacturing process and strong market competitiveness

Active Publication Date: 2013-08-07
WUHAN IRON & STEEL GRP ECHENG IRON & STEEL CO LTD
View PDF9 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The Chinese Patent Publication No. CN102605272A discloses a low-alloy ultra-high-strength wear-resistant steel and its production method. The ingot is obtained by die casting, and its composition weight percentage is: C: 0.20~0.35%, Si: 0.3~0.7%, Mn: 0.6~1.0%, Cr: 0.7~1.1%, Ni: 0.6~1.0%, Mo: 0.3~0.7%, the rest is Fe and trace impurity elements, the ingot is forged, and then 900°C~940°C normalizing (holding time 1~3 hours) -880°C~920°C quenching (holding time 1~3 hours) -150°C~220°C low temperature tempering (holding time 2~4 hours) to obtain A steel plate with high strength, high toughness, and high wear resistance. The disadvantage is that the addition of precious alloys Ni, Cr, and Mo is large, the cost of the alloy is still high, the heat treatment process is complicated, and the process cost and energy consumption are high.
[0007] The Chinese Patent Publication No. CN102605234A discloses a 400HB grade wear-resistant steel plate and its manufacturing method. The composition weight percentage is: C: 0.08~0.24%, Si: 0.1~0.3%, Mn: 0.7~1.7% , Cr: 1.0%, Mo: 0.6%, B: 0.0005~0.004%, Ti: 0.005~0.04%, the rest are Fe and trace impurity elements, produced by casting-controlled rolling-quenching and tempering heat treatment process, with excellent performance, suitable for manufacturing The disadvantages of wear-resistant equipment in construction machinery are that the efficiency of traditional casting process is lower than that of continuous casting process, the cost of quenching and tempering heat treatment process is high and the production cycle is long, and the cost of alloy can be further reduced

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
  • NM400-level anti-crack high-strength wear-resistant steel and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]A kind of NM400 crack-resistant high-strength wear-resistant steel, its components and weight percentage content: C: 0.04%, Si: 0.37%, Mn: 1.40%, Als: 0.015%, P: 0.01%, S: 0.0078%, Cr: 0.42%, Mo: 0.30%, Ti: 0.014%, B: 0.0015%, the rest are Fe and trace impurity elements, and satisfy CEV=C+Mn / 6+(V+Mo+Cr) / 5+ (Ni +Cu) / 15=0.483.

[0030] Production steps:

[0031] 1) Smelting and continuous casting into billets;

[0032] 2) Heating the billet, the heating temperature is controlled at 1190~1200°C;

[0033] 3) Rolling process: start rolling temperature 1050~1060°C, finish rolling temperature 1020~1030°C, pass reduction rate: 10%;

[0034] 4) Carry out water cooling, the starting cooling temperature is 920°C, the cooling speed is controlled at 23°C / s, and the final cooling temperature is 295~299°C;

[0035] 5) Natural cooling to room temperature;

[0036] 6) Perform tempering, and the tempering temperature is controlled at 280~290°C.

Embodiment 2

[0038] A kind of NM400 crack-resistant high-strength wear-resistant steel, its components and weight percentage content: C: 0.062%, Si: 0.39%, Mn: 1.42%, Als: 0.023%, P: 0.013%, S: 0.0048%, Cr: 0.45%, Mo: 0.38%, Ti: 0.015%, B: 0.0013%, the rest are Fe and trace impurity elements, and satisfy CEV=C+Mn / 6+(V+Mo+Cr) / 5+ (Ni +Cu) / 15=0.512.

[0039] Production steps:

[0040] 1) Smelting and continuous casting into billets;

[0041] 2) Heating the billet, the heating temperature is controlled at 1180~1187°C;

[0042] 3) Rolling process: start rolling temperature 1090~1100℃, finish rolling temperature 1025~1035℃, pass reduction rate: 15%;

[0043] 4) Carry out water cooling, the starting cooling temperature is 930°C, the cooling speed is controlled at 25°C / s, and the final cooling temperature is 265~275°C;

[0044] 5) Natural cooling to room temperature;

[0045] 6) Perform tempering, and the tempering temperature is controlled at 270~290°C.

Embodiment 3

[0047] A kind of NM400 crack-resistant high-strength wear-resistant steel, its components and weight percentage content: C: 0.072%, Si: 0.33%, Mn: 1.35%, Als: 0.022%, P: 0.011%, S: 0.0022%, Cr: 0.26%, Mo: 0.47%, Ti: 0.021%, B: 0.0023%, the rest are Fe and trace impurity elements, and satisfy CEV=C+Mn / 6+(V+Mo+Cr) / 5+ (Ni +Cu) / 15≤0.57.

[0048] Production steps:

[0049] 1) Smelting and continuous casting into billets;

[0050] 2) Heating the billet, the heating temperature is controlled at 1230~1240°C;

[0051] 3) Rolling process: start rolling temperature 1120~1130℃, finish rolling temperature 1040~1050℃, pass reduction rate: 20%;

[0052] 4) Carry out water cooling, the starting cooling temperature is 940°C, the cooling speed is controlled at 27°C / s, and the final cooling temperature is 275~295°C;

[0053] 5) Natural cooling to room temperature;

[0054] 6) Perform tempering, and the tempering temperature is controlled at 310~320°C.

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
Thickness specificationaaaaaaaaaa
Yield strengthaaaaaaaaaa
Rmaaaaaaaaaa
Login to View More

Abstract

The invention relates to NM400-level anti-crack high-strength wear-resistant steel. The NM400-level anti-crack high-strength wear-resistant steel comprises the following components in percentage by weight: 0.04-0.08% of C, 0.20-0.50% of Si, 1.20-1.50% of Mn, not more than 0.015% of P, not more than 0.005% of S, 0.25-0.60% of Cr, 0.20-0.50% of Mo, 0.005-0.025% of Ti, 0.001-0.005% of B and 0.015-0.05% of Als. The production steps are as follows: smelting, and performing continuous casting to form a blank; heating the cast blank; rolling; water-rolling; air-cooling to room temperature; and tempering. The NM400-level anti-crack high-strength wear-resistant steel disclosed by the invention has the advantages of low alloy cost, small adding quantity of alloy and excellent welding performance and anti-flame cutting crack sensitivity, and can avoid the energy loss caused by a complex heat treatment process and simultaneously greatly shorten the production period; and in addition to the excellent welding performance and anti-flame cutting crack sensitivity, as the manufacturing process is simple and the flow process is short, the cost can be reduced by 15%, the energy consumption can be reduced by 25%, and the process operability is improved, thus the NM400-level anti-crack high-strength wear-resistant steel has very strong market competitiveness, broad application prospects and obvious economic and social benefits.

Description

technical field [0001] The invention belongs to the field of manufacturing wear-resistant steel for mechanical engineering, and in particular relates to an NM400 crack-resistant high-strength wear-resistant steel and a processing method thereof. Background technique [0002] Wear and tear generally occurs on the friction surface of materials. A large number of statistics show that nearly half of the energy is consumed by wear, and 80% of the material fails due to wear. If coupled with the shutdown of manpower replacement parts, poor quality of mechanical products and low efficiency, economical The losses will be greater. According to statistics, my country consumes more than 3 million tons of metal wear-resistant materials every year. Applying the theory of friction and wear to prevent and reduce friction and wear can save 15 billion US dollars per year. At present, the wear-resistant materials that can be used are divided into three categories: metals and metal compounds, ...

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): C22C38/32C21D8/02
Inventor 李德发王世森熊玉彰董汉雄余宏伟张云燕熊涛陈勇洪君易勋
Owner WUHAN IRON & STEEL GRP ECHENG 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