CN101363104A - Abrasion-resistant material for wet-type and weak acidic medium - Google Patents
Abrasion-resistant material for wet-type and weak acidic medium Download PDFInfo
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- CN101363104A CN101363104A CNA200810198621XA CN200810198621A CN101363104A CN 101363104 A CN101363104 A CN 101363104A CN A200810198621X A CNA200810198621X A CN A200810198621XA CN 200810198621 A CN200810198621 A CN 200810198621A CN 101363104 A CN101363104 A CN 101363104A
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Abstract
The invention relates to an anti-abrasion material used in a wet weak-acidic medium. The material is characterized by consisting of the following elements by mass percentages: 0.17-0.26% of C, 12.5-14.5% of Cr, 0.5-1.2% Mn, 0.01-0.18% of Ni, 0.2-0.6% of Mo, 0.5-1.2% of Cu, less than 0.05% of P, less than 0.05% of S, 0.3-0.9% of Si, and Fe. The anti-abrasion material used in the wet weak-acidic medium has the excellent comprehensive corrosion wear resistance under the situation of 49 minus or plus 51 DEG C and dynamic impingement corrosion and wear of the weak-acidic medium, and the comprehensive corrosion wear resistance can be increased by more than twice compared with the manganese steel (Mn13Cr2) under the same condition.
Description
Technical field
The present invention relates to a kind of abrasion-resistant material, particularly a kind of abrasion-resistant material for wet-type and weak acidic medium.
Background technology
Under the wet-type and weak acidic medium, the ball mill working condition is abominable and complicated, is subjected to the burn into impact grinding to undermine corrosion and the interaction of wearing and tearing, and causes its liner plate shorter work-ing life.At present, generally use high mangaenese steel (Mn13Cr2 austenitic matrix) material to make ball grinding machine lining board under the wet-type and weak acidic medium operating mode both at home and abroad, generally be 4～6 months work-ing life.Under wet-type and weak acidic medium, the little energy that ball grinding machine lining board bore is little when repeatedly shock load is more than dry grinding, liner plate directly is subjected to the ballistic chance of abrading-ball few in moving process, cause high manganese steel lining plate work hardening effect to be difficult to performance, relatively poor owing to high mangaenese steel material erosion resistance simultaneously, thus it is not wear-resisting.
Summary of the invention
The object of the present invention is to provide the good material of a kind of anti-erosion performance.
Purpose of the present invention realizes by following measure: abrasion-resistant material is elementary composition by following quality percentage: C:0.17～0.26; Cr:12.5～14.5; Mn:0.5～1.2; Ni:0.01～0.18; Mo:0.2～0.6; Cu:0.5～1.2; P＜0.05; S＜0.05; Si:0.3～0.9; All the other are Fe.
Preferred the elementary composition of quality percentage is: C:0.18～0.25; Cr:13.0～14.0; Mn:0.5～1.0; Ni:0.02～0.16; Mo:0.3～0.5; Cu:0.5～1.0; P＜0.05; S＜0.05; Si:0.4～0.8; All the other are Fe.
Best the elementary composition of quality percentage is: C:0.24; Cr:12.53; Mn:0.55; Ni:0.05; Mo:0.34; Cu:0.78; P:0.039, S:0.012; Si:0.46; All the other are Fe.
The effective element composition design considerations of abrasion-resistant material and limit the reasons are as follows of content range under the wet-type and weak acidic medium of the present invention:
C: be the principal element that influences abrasion-resistant material hardness, toughness, wear resistance and oxidation-resistance.Within the specific limits, increase with C content, carbide quantity increases, and the wear resistance of material increases, and it mainly acts on the type that shows matrix after the thermal treatment, mainly influences the wear resisting property of material.But under the corrosive wear condition, C content increases, and carbide quantity increases, and phase boundary increases, and the phase boundary seriously corroded is so C content is controlled at 0.17～0.26%.
Si: being the principal element that improves carbide structure and form, is again corrosion resistant principal element.Can cooperate with Mn and obviously improve hardening capacity, improve the temper brittleness temperature.In corrosion process, Si adds can make material surface form stable SiO
2Passive film stops the intrusion of corrosive medium, helps the raising of material wear-resistant erosion property, and therefore, the content of Si is chosen in 0.3～0.9%.
Mn: increase hardening capacity and homogeneity of fault plane.
Cr: one side is stable carbide strongly, is dissolved in austenite and strengthens matrix and improve its hardening capacity, mainly influences the intensity and the toughness of material, helps wear resistance and improves; On the other hand, form passive film, improve the electropotential of matrix, help corrosion proof raising.Therefore, under the corrosive wear condition, Cr is the main alloy element of wear-and corrosion-resistant material, thus the content of Cr be chosen in 12.5～14.5% more suitable.
Mo: outside can increasing its hardening capacity in right amount, improving temper resistance, strengthen matrix and resistance to wear, in the hygrometric state medium, Mo can improve electropotential, and erosion resistance is preferably arranged.
Ni: be the main added elements of corrosion-resistant material, outside can increasing hardening capacity in right amount, improving temper resistance and resistance to wear, in the hygrometric state medium, the adding of Ni can improve the base electrode current potential, alleviates the phase boundary corrosion.But under strong wearing and tearing-weak corrosive working condition, the adding of excessive Ni descends matrix hardness, paralympic increasing, and resistance to abrasion decline on the contrary is so that the content of Ni is chosen in is 0.01～0.16% more suitable.
Cu: under the wet-type and weak acidic medium operating mode, Cu is the important element that influences the material erosion resistance.The effect of Cu is to improve the base electrode current potential, reduces corrosion speed, and promote the matrix passivation and make passive film more stable, thus the erosion resistance of strongthener.For Fe-Cr (or Fe-Cr-X system) is cast alloy iron, has a poor Cr district between carbide and matrix, and corrosion is usually preferentially carried out in this section.Add the Cu be insoluble to carbide on a small quantity, can near carbide, form rich Cu district and offset the influence of poor Cr, thus the corrosion resistance of raising material under the wet-milling situation.
Abrasion-resistant material is made with the medium-frequency induction furnace fusing under the wet-type and weak acidic medium of the present invention, and its processing step is: 1. with the fusing of the pig iron, steel scrap and various iron alloy (as low carbon ferrochromium, electrolytic manganese, molybdenum-iron and nickel plate etc.) Hybrid Heating, and the carbon drop slagging-off; 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. behind the casting pouring, to be cooled during to 500～700 ℃, unclamp sandbox earlier, when continuing to be cooled to 200～300 ℃, cut away cast gate and rising head behind the shake out, cleaning overlap and burr; 5. foundry goods rises to 880～920 ℃ from room temperature in heat treatment furnace, and insulation is 〉=3 hours under this temperature, the cold annealing of stove then; 6. after having annealed, be warming up to 960～1000 ℃ again, insulation is 〉=3 hours under this temperature, the oil cooling of coming out of the stove; 7. temper 〉=2 hour under 380～420 ℃ of temperature again.
Description of drawings
Fig. 1 is the metallographic microstructure of embodiment 1;
Fig. 2 is the metallographic microstructure of embodiment 2.
Embodiment
By elemental composition requirement of the present invention, it is joined in the stove melt, treat the cast of coming out of the stove when iron liquid reaches 1500～1550 ℃, blow carbon dioxide hardening sand mold casting with water glass.Teeming temperature is 1400 ℃.After the foundry goods cooling, cut away cast gate and rising head, cleaning residue and burr.Thermal treatment process: 1. annealing: be heated to 900 ℃ from room temperature, be incubated 4 hours, stove is chilled to room temperature; 2. quench: be heated to 980 ℃ from room temperature, be incubated 5 hours, the oil cooling of coming out of the stove then; 3. tempering: be heated to 400 ℃, be incubated 2 hours, be chilled to room temperature with stove.Chemical analysis is carried out in sampling, and elemental composition and hardness see Table 1.
The elemental composition of table 1 embodiment and hardness
Annotate: all the other are Fe
The metallographic structure of material of the present invention is: martensite+carbide+small portion of residual austenite, its eutectic carbides are the M of middle hardness
23C
6The type structure is isolated shape uniform distribution, durometer level 42～48HRC.Fig. 1, Fig. 2 are seen in its metallographic structure.
Abrasion-resistant material and manganese steel are done slightly acidic (quartz sand+distilled water+CuSO under the wet-type and weak acidic medium of the present invention on M2000 type dynamic load Corrosive Impact Wear trier
4+ NaCl), 50 ± 1 ℃ wet-milling dynamic impulsion corrosive wear test, performance relatively sees Table 2.
Table 2 material of the present invention compares with the performance of different manganese steel
Annotate: the concrete composition of manganese steel series sees Table 3.
The composition of table 3 manganese steel series
By table 2 as seen, abrasion-resistant material of the present invention under wet-type and weak acidic medium dynamic impulsion corrosive wear operating mode, comprehensively resistance to wear and corrosion resistance all be better than manganese steel, the comprehensive corrosive wear raising of manganese steel (Mn13Cr2) is more than 2 times under the comparable condition of the same race.
Because the adding of Cr, Cu and Si has improved the corrosion resistance of material significantly, thereby makes material of the present invention corrosion resistance under the wet-type and weak acidic working condition be improved greatly.And Mo, Ni have improved the hardening capacity of material significantly, refinement the crystal grain of material, also changed simultaneously the anti-erosion performance of material.
Claims (3)
1. abrasion-resistant material for wet-type and weak acidic medium is characterized in that elementary composition by following mass percent: C:0.17～0.26; Cr:12.5～14.5; Mn:0.5～1.2; Ni:0.01～0.18; Mo:0.2～0.6; Cu:0.5～1.2; P＜0.05; S＜0.05; Si:0.3～0.9; All the other are Fe.
2. abrasion-resistant material for wet-type and weak acidic medium according to claim 1 is characterized in that elementary compositionly being: C:0.18～0.25; Cr:13.0～14.0; Mn:0.5～1.0; Ni:0.02～0.16; Mo:0.3～0.5; Cu:0.5～1.0; P＜0.05; S＜0.05; Si:0.4～0.8; All the other are Fe.
3. abrasion-resistant material for wet-type and weak acidic medium according to claim 1 is characterized in that elementary compositionly being: C:0.24; Cr:12.53; Mn:0.55; Ni:0.05; Mo:0.34; Cu:0.78; P:0.039, S:0.012; Si:0.46; All the other are Fe.
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| CN200810198621XA CN101363104B (en) | 2008-09-19 | 2008-09-19 | Abrasion-resistant material for wet-type and weak acidic medium |
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| CN101363104A true CN101363104A (en) | 2009-02-11 |
| CN101363104B CN101363104B (en) | 2010-09-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586701A (en) * | 2011-11-30 | 2012-07-18 | 肇庆匹思通机械有限公司 | Iron alloy material and balance block manufactured by iron alloy material |
| CN109518086A (en) * | 2018-12-12 | 2019-03-26 | 国家电投集团黄河上游水电开发有限责任公司 | Alloy material for carbon strong cooling machine plough share shovel for aluminum |
-
2008
- 2008-09-19 CN CN200810198621XA patent/CN101363104B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586701A (en) * | 2011-11-30 | 2012-07-18 | 肇庆匹思通机械有限公司 | Iron alloy material and balance block manufactured by iron alloy material |
| CN109518086A (en) * | 2018-12-12 | 2019-03-26 | 国家电投集团黄河上游水电开发有限责任公司 | Alloy material for carbon strong cooling machine plough share shovel for aluminum |
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| CN101363104B (en) | 2010-09-08 |
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Effective date of registration: 20171228 Address after: 510651 Changxin Road, Guangzhou, Guangdong, No. 363, No. Patentee after: GUANGDONG INSTITUTE OF MATERIALS AND PROCESSING Address before: 510651 Changxin Road, Guangzhou, Guangdong, No. 363, No. Patentee before: Guangzhou Research Institute of Non-ferrous Metals |
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