CN1401810A - Abrasion-resistant iron and steel material - Google Patents
Abrasion-resistant iron and steel material Download PDFInfo
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- CN1401810A CN1401810A CN 02134601 CN02134601A CN1401810A CN 1401810 A CN1401810 A CN 1401810A CN 02134601 CN02134601 CN 02134601 CN 02134601 A CN02134601 A CN 02134601A CN 1401810 A CN1401810 A CN 1401810A
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Abstract
An antiabrasion steel contains C (1.2-3.4 mass%), Cr (23-30 mass%), Si (0.3-2.8 mass%), Ni (0.8-1.8 mass%), N (0.01-0.3 mass%), RE (0.01-0.3 mass%), Nb (0.01-1.0 mass%) and Fe (the rest). Its advantage is high antiabrasion and antiwear performance.
Description
Technical field
The present invention relates to the anti scuffing metallic substance.
Background technology
At present, in the abrasive wear operating mode, particularly under various hygrometric state corrosion abrasive wear operating mode (for example slag stock pump flow passage part operating mode) conditions of industries such as electric power, building materials, metallurgy, chemical industry, used material great majority are to adopt martensitic matrix Gao Ge (Cr 10～28%) antifriction cast iron.Be typically the KmTBCr26 cast iron of GB/T8263-1999 defined, its shortcoming be cast iron hardness only about 60HRC, anti-erosion performance is not high.And under dry state high temperature oxidation and corrosion wear working condition (for example metallurgy sintered machine grid section operating mode) condition, used material great majority are that carbon content is 1.2～2.0% Cr26 steel, and the shortcoming of its existence is that high temperature resistance abrasion performance is not high.
Summary of the invention
The object of the present invention is to provide the good ferrous materials of a kind of anti-erosion performance.
Purpose of the present invention realizes by following measure: ferrous materials comprises the chemical ingredients of following quality percentage: C 1.2～3.4; Cr 23～30; Si 0.3～2.8; Ni 0.3～1.8; N 0.01～0.3; RE 0.01～0.3; Nb 0.01～1.0; All the other are Fe.
The chemical ingredients of preferred quality percentage is: C 2.1～3.3; Cr 24～28; Si 0.3～2.4; Ni0.3～1.2; N 0.03～0.2; RE 0.03～0.2; Nb 0.03～0.5; All the other are Fe.
The chemical ingredients of best quality percentage is: C 2.7; Cr 26; Si 1.0; Ni 0.8; N 0.18; RE 0.04; Nb 0.3; All the other are Fe.
Mo 0.1～3.0, Mn 0.3～2.0, Cu 0.1～1.0 or the W 0.1～0.8 that can also add the quality percentage.
The reasons are as follows of the active chemical design considerations of abrasion-resistant iron and steel material of the present invention and qualification content range:
C is the principal element that influences anti scuffing iron and steel hardness, toughness, wear resistance and oxidation-resistance, carbon amount height, and then carbide quantity is many, and the hardness height of material is wear-resistant, but toughness reduces easily fragmentation in use; And the carbon amount is low, and then toughness is higher, but carbide quantity reduces, and hardness reduces, and is unfavorable for wear-resistantly, but helps anti-oxidant.Therefore the content of carbon is controlled at 1.2～3.4% more suitablely, and wherein carbon content is used for hygrometric state corrosion abrasive wear operating mode more than or equal to 2.0% material more, and carbon content is applicable to high temperature oxidation and corrosion abrasive wear operating mode at 1.2～2.0% material.
Cr measures high, then easily forms M
7C
3The type carbide structure helps anticorrosively, helps improving anti-erosion performance, thus the content of Cr be chosen in 23～30% more suitable.
Si is the principal element that improves carbide structure and form, is again corrosion resistant principal element.It is high that Si measures, and helps to improve carbide morphology, also help to increase solidity to corrosion, but too high silicon content will reduce toughness, and therefore, it is 0.3～2.8% more suitable that the content of Si is chosen in.
The main effect of Ni is hardening capacity and the solidity to corrosion that improves material, but too high ni content will make the more austenite of appearance in the material structure, be unfavorable for resistance to wearing, and therefore, it is 0.3～1.8% more suitable that the content of Ni is chosen in.
The main effect of rare earth elements RE is the refinement material grains, improve carbide morphology and distribution, impel carbide to be isolated shape uniform distribution, significantly reduce inclusion, improve metallurgical quality, thereby improved the anti-erosion performance of material, but excessive RE will worsen quality of materials, reduce toughness, therefore, the content of RE is chosen in 0.01～0.3% and is advisable.
The main effect of N and Nb is a crystal grain thinning, and obviously improves the hardness and the anti-erosion performance of material thus.But the price of the solid solubility limit of N and Nb is higher in the invar iron material, so the content of N is chosen in 0.01～0.3%; The content of Nb is chosen in 0.01～1.0% and is advisable.
The main effect of Mo, Mn, Cu and W is the through hardening performance that improves material, but its price height, therefore, the content of Mo is chosen in 0.1～3.0%; The content of Mn is chosen in 0.3～2.0%; The content of Cu is chosen in 0.1～1.0%; The content of W is chosen in 0.1～0.8% and is advisable.
Anti scuffing iron and steel electric furnace manufacturing of the present invention, processing step is: 1. with the pig iron, steel scrap and the fusing of various iron alloy Hybrid Heating; 2. after temperature rises to 1500 ℃～1550 ℃, the cast of coming out of the stove; 3. use sand mold casting, teeming temperature is 1350 ℃～1450 ℃; 4. after the foundry goods cooling, cut away cast gate and rising head, cleaning overlap and burr.Carbon content rises to 950 ℃～1050 ℃ from room temperature more than or equal to 2.0% foundry goods in heat treatment furnace, under this temperature, be no less than 2 hours insulation, air-cooled or the air cooling of coming out of the stove then is no less than 2 hours temper again under 180 ℃～500 ℃ temperature.Carbon content does not need thermal treatment and the as cast condition application at 1.2～2.0% foundry goods.
Embodiment
By chemical ingredients requirement of the present invention various compositions are joined in the stove and to melt, treat the cast of coming out of the stove when iron liquid reaches 1500～1550 ℃, use sand mold casting.Teeming temperature is 1400 ℃.After the foundry goods cooling, cut away cast gate and rising head, cleaning undesirable root and burr.Foundry goods is risen to 950 ℃～1050 ℃ from room temperature in heat treatment furnace, be no less than 2 hours insulation under this temperature, the air-cooled or air cooling of coming out of the stove then is again 200 ℃ of temper that are no less than 2 hours.Chemical analysis is carried out in sampling, and chemical ingredients and hardness result see Table 1.Table 1
Annotate: all the other are Fe.
| Embodiment | Chemical ingredients | |||||||||||
| ??C | ??Cr | ??Si | ??Ni | ??N | ??RE | ??Nb | ??Mo | ??Cu | ??Mn | ??W | Hardness (HRC) | |
| ????1 | ??2.7 | ??26 | ??1.0 | ??0.8 | ??0.18 | ??0.04 | ??0.3 | ????62 | ||||
| ????2 | ??2.3 | ??24.1 | ??0.63 | ??1.0 | ??0.2 | ??0.03 | ??0.5 | ?0.9 | ?0.3 | ????0.4 | ?0.5 | ????61 |
| ????3 | ??1.5 | ??26.2 | ??1.8 | ??1.5 | ??0.03 | ??0.05 | ??0.04 | ????0.59 | ????42 | |||
| ????4 | ??3.3 | ??28.5 | ??0.9 | ??0.4 | ??0.16 | ??0.13 | ??0.2 | ?2.4 | ?0.8 | ????1.2 | ?0.3 | ????63.5 |
The metallographic structure of C of the present invention 〉=2.0% is: martensite+carbide+small portion of residual austenite, its eutectic carbides are the M of high rigidity
7C
3The type structure is isolated shape uniform distribution, and durometer level is 61～64HRC.
C of the present invention 〉=2.0% on jetting type erosion corrosion wear testing machine, do slurry (quartz sand+water) wet-milling test with the KmTBCr26 antifriction cast iron, on heavily stressed dynamic load abrasive test machine, do quartz sand dry grinding test, performance relatively sees Table 2.Table 2
| The wear-resistant multiplying power of dry grinding | Wet-milling anti scuffing multiplying power | Hardness (HRC) | |
| KmTBCr26 cast iron | ????1.0 | ????1.0 | ????60 |
| The present invention's (C 〉=2.0%) | ????1.15 | ????1.21 | ????63 |
The metallographic structure of C 1.2～2.0% of the present invention is austenite+ferrite+carbide.Make grid section with the common Cr26 steel of carbon containing 1.2～2.0% and use on the metallurgy sintered machine of Steel Plant, performance relatively sees Table 3.Table 3
| Grid section is the anti scuffing multiplying power under high temperature oxidation and corrosion abrasive wear condition | |
| Common Cr26 steel (C 1.2～2.0%) | ?????????????????????1.0 |
| The present invention (C 1.2～2.0%) | ?????????????????????1.2 |
This shows, material of the present invention do, resistance to abrasion and anti-erosion performance under hygrometric state and the high temperature abrasive wear condition all be higher than KmTBCr26 cast iron and Cr26 steel.
Material of the present invention is owing to contain a certain amount of N, RE and Nb, the obvious refinement of adding of these elements the crystal grain of material, improved the form of hard phase carbide, obviously reduced inclusion, thereby improved the metallurgical quality of material, improve the hardness of material, improved the anti-erosion performance and the wear resistance of material.Material of the present invention is owing to containing corrosion resistance and the anti-erosion performance that higher Cr and an amount of Si element have improved material.In addition, the present invention only adopts simple thermal treatment process, and the material of C 1.2～2.0% is not needed thermal treatment and the as cast condition application, and production cost is suitable.
Claims (7)
1, a kind of abrasion-resistant iron and steel material is characterized in that comprising the chemical ingredients of following quality percentage: C1.2～3.4; Cr 23～30; Si 0.3～2.8; Ni 0.3～1.8; N 0.01～0.3; RE 0.01～0.3; Nb0.01～1.0; All the other are Fe.
2, abrasion-resistant iron and steel material according to claim 1, it is characterized in that the chemical ingredients of quality percentage is: C 2.1～3.3; Cr 24～28; Si 0.3～2.4; Ni 0.3～1.2; N 0.03～0.2; RE 0.03～0.2; Nb 0.03～0.5; All the other are Fe.
3, abrasion-resistant iron and steel material according to claim 1 is characterized in that C 2.7; Cr 26; Si1.0; Ni 0.8; N 0.18; RE 0.04; Nb 0.3; All the other are Fe.
4, abrasion-resistant iron and steel material according to claim 1 is characterized in that adding the Mo 0.1～3.0 of quality percentage.
5, abrasion-resistant iron and steel material according to claim 1 is characterized in that adding the Mn 0.3～2.0 of quality percentage.
6, abrasion-resistant iron and steel material according to claim 1 is characterized in that adding the Cu 0.1～1.0 of quality percentage.
7, abrasion-resistant iron and steel material according to claim 1 is characterized in that adding the W 0.1～0.8 of quality percentage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021346011A CN1185360C (en) | 2002-08-23 | 2002-08-23 | Abrasion-resistant iron and steel material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021346011A CN1185360C (en) | 2002-08-23 | 2002-08-23 | Abrasion-resistant iron and steel material |
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| CN1401810A true CN1401810A (en) | 2003-03-12 |
| CN1185360C CN1185360C (en) | 2005-01-19 |
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| CNB021346011A Expired - Fee Related CN1185360C (en) | 2002-08-23 | 2002-08-23 | Abrasion-resistant iron and steel material |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277541A (en) * | 2011-08-05 | 2011-12-14 | 马鞍山钢铁股份有限公司 | Rare earth alloy steel grid section of sintering pallet |
| CN103361572A (en) * | 2013-07-16 | 2013-10-23 | 河北中天泵业有限公司 | Antiwear metal material for mud pump flow passage components |
| CN103388104A (en) * | 2012-05-11 | 2013-11-13 | 上海世传金属材料研发中心 | Heat resistant alloy and preparation method thereof |
| CN103422030A (en) * | 2013-07-19 | 2013-12-04 | 燕山大学 | High-chromium alloy for sintering pallet bar grate and manufacturing method of high-chromium alloy |
| CN106086707A (en) * | 2016-06-06 | 2016-11-09 | 浙江精龙刀剑有限公司 | A kind of daggers and swords riffled iron |
| CN107641692A (en) * | 2017-08-10 | 2018-01-30 | 安徽省凤形耐磨材料股份有限公司 | A kind of Heat Treatment Process of High Chromium Cast Irons |
| CN109514192A (en) * | 2018-11-19 | 2019-03-26 | 贵阳华丰航空科技有限公司 | A kind of corrosion-resistant screw processing and forming technology of aircraft utilization |
-
2002
- 2002-08-23 CN CNB021346011A patent/CN1185360C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277541A (en) * | 2011-08-05 | 2011-12-14 | 马鞍山钢铁股份有限公司 | Rare earth alloy steel grid section of sintering pallet |
| CN102277541B (en) * | 2011-08-05 | 2013-03-27 | 马鞍山钢铁股份有限公司 | Rare earth alloy steel grid section of sintering pallet |
| CN103388104A (en) * | 2012-05-11 | 2013-11-13 | 上海世传金属材料研发中心 | Heat resistant alloy and preparation method thereof |
| CN103388104B (en) * | 2012-05-11 | 2016-01-20 | 上海华培动力科技有限公司 | A kind of refractory alloy and preparation method thereof |
| CN103361572A (en) * | 2013-07-16 | 2013-10-23 | 河北中天泵业有限公司 | Antiwear metal material for mud pump flow passage components |
| CN103422030A (en) * | 2013-07-19 | 2013-12-04 | 燕山大学 | High-chromium alloy for sintering pallet bar grate and manufacturing method of high-chromium alloy |
| CN106086707A (en) * | 2016-06-06 | 2016-11-09 | 浙江精龙刀剑有限公司 | A kind of daggers and swords riffled iron |
| CN106086707B (en) * | 2016-06-06 | 2017-12-15 | 浙江精龙刀剑有限公司 | A kind of daggers and swords riffled iron |
| CN107641692A (en) * | 2017-08-10 | 2018-01-30 | 安徽省凤形耐磨材料股份有限公司 | A kind of Heat Treatment Process of High Chromium Cast Irons |
| CN109514192A (en) * | 2018-11-19 | 2019-03-26 | 贵阳华丰航空科技有限公司 | A kind of corrosion-resistant screw processing and forming technology of aircraft utilization |
| CN109514192B (en) * | 2018-11-19 | 2020-06-23 | 贵阳华丰航空科技有限公司 | Machining and forming process for corrosion-resistant screw used for airplane |
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|---|---|
| CN1185360C (en) | 2005-01-19 |
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Owner name: GUANGZHOU RESEARCH INSTITUTE OF NONFERROUS METALS Free format text: FORMER OWNER: GUANGYAN NEW MATERIAL SCIENCE AND TECHNOLOGY CO LTD, GUANGDONG Effective date: 20040910 |
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Effective date of registration: 20040910 Address after: 510500 Guangdong city of Guangzhou province Tianhe District Shahe Chang ban Applicant after: Guangzhou Research Institute of Non-ferrous Metals Address before: Wushan 510651 Guangdong city of Guangzhou Province Applicant before: Guangyan New Material Science and Technology Co Ltd, Guangdong |
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