CN1073639C - Medium-chrome silicone anti-corrosion wear-resisting cast iron and mfg. method thereof - Google Patents
Medium-chrome silicone anti-corrosion wear-resisting cast iron and mfg. method thereof Download PDFInfo
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- CN1073639C CN1073639C CN96119062A CN96119062A CN1073639C CN 1073639 C CN1073639 C CN 1073639C CN 96119062 A CN96119062 A CN 96119062A CN 96119062 A CN96119062 A CN 96119062A CN 1073639 C CN1073639 C CN 1073639C
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Abstract
The present invention relates to medium chromium-silicon wear resistant and corrosion resistant cast iron which comprises the following chemical components: 2.1 to 3.4 wt% of C, 5.1 to 9.9 wt% of Cr, 1.5 to 2.8 wt% of Si, 0.3 to 2.0 wt% of Mn, 0.01 to 0.3 wt% of RE, 0 to 1.0 wt% of Mo, 0 to 1.0 wt% of Cu, 0 to 1.0 wt% of Ni, and Fe and unavoidable trace impurities as the rest. Compared with medium chromium white cast iron with a high silicon-carbon ratio, the cast iron of the present invention has excellent wear resistant and corrosion resistant performance and shock resistance fatigue performance in conditions of dry state impact abrasion and wet state impact abrasion. The present invention only adopts a simple and convenient aging treatment technology, a complicated heat treatment process of isothermal quenching is omitted, and thereby, the production cost is remarkably lowered.
Description
The present invention relates to wear and corrosion resistant cast iron and manufacture method thereof, particularly medium-chrome silicone wear and corrosion resistant cast iron and manufacture method thereof.
At present, in the abrasive wear operating mode, particularly do industries such as electric power, building materials, metallurgy, chemical industry various, under the hygrometric state impact abrasive wear working condition (for example abrading-ball of ball mill and liner plate operating mode), martensitic matrix Gao Ge (Cr10～25%) wear and corrosion resistant cast iron is the material of excellent performance.Chinese patent application number is to disclose a kind of high silicon-carbon ratio medium chromium white cast iron in 90105131.4 (notification number is CN1056901A), matrix is martensite+bainite+austenite, and the wear and corrosion behavior of its shock resistance abrasive wear is apparently higher than above-mentioned martensitic matrix rich chromium cast iron.But the shortcoming of its existence is exactly its thermal treatment process adopts isothermal quenching, 220 ℃～400 ℃ salt made from earth containing a comparatively high percentage of sodium chloride salt bath isothermals air cooling after 1～6 hour of promptly after 940 ℃～1040 ℃ insulations, quenching, and its thermal treatment process is complicated, and production cost is higher.
One of purpose of the present invention is to provide a kind of performance good, the chemical composition of the medium-chrome silicone wear and corrosion resistant cast iron that cost is low.
Two of purpose of the present invention is to provide a kind of manufacture method of medium-chrome silicone wear and corrosion resistant cast iron.
Purpose of the present invention realizes by following measure:
The chemical ingredients (weight percentage) of medium-chrome silicone wear and corrosion resistant cast iron material of the present invention is:
C:2.1％～3.4％ Cr:5.1％～9.9％
Si:1.51％～2.8％ Mn:0.3％～2.0％
RE 0.01％～0.3％
All the other are Fe and inevitable trace impurity.
The Cr lower aq (weight percentage) of above-mentioned erosion resistant cast iron is 6%～8.9%.
The Si lower aq (weight percentage) of above-mentioned erosion resistant cast iron is 1.51%～2.4%.
The RE lower aq (weight percentage) of above-mentioned erosion resistant cast iron is 0.02%～0.1%.
The Chemical Composition (weight percentage) of best medium-chrome silicone erosion resistant cast iron quality is:
C:3.0％ Cr:8.9％
Si:2.2％ Mn:1.1％
RE:0.04％
All the other are Fe and inevitable trace impurity.
Above-mentioned erosion resistant cast iron quality chemical ingredients in can also add following chemical components (weight percentage) and be:
Mo:0％～1.0％ Cu:0～1.0％
Ni:0％～1.0％
The manufacturing of medium-chrome silicone wear and corrosion resistant cast iron of the present invention can be produced with electric furnace, and its processing step is:
(1), with the pig iron, steel scrap, the fusing of various iron alloy Hybrid Heating;
(2), after temperature rises to 1500 ℃～1550 ℃, the cast of coming out of the stove;
(3), with metal mold or sand mold casting, teeming temperature is 1400 ℃～1450 ℃;
(4), after the foundry goods cooling, spruing, cleaning overlap, burr;
(5), foundry goods is no less than 2 hours simple ageing treatment under room temperature to 300 ℃ temperature.
The reasons are as follows of the active chemical design considerations of medium-chrome silicone wear and corrosion resistant cast iron material of the present invention and qualification content range:
Carbon (C): C influences medium-chrome silicone cast iron hardness and flexible principal element, carbon amount height, and then carbide quantity is many, the hardness height of cast iron, 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, be unfavorable for wear-resistant, so the content of carbon be controlled at 2.1%～3.4% more suitable.
Chromium (Cr): Cr measures high, then easily forms M
T, C
3The type carbide structure helps wear and corrosion behavior and improve, but its production cost is also high, and the Cr amount is low, and production cost is low, but wear and corrosion behavior reduces, thus the content of Cr be chosen in 5.1%～9.9% more suitable.
Silicon (Si): Si is that the principal element that improves carbide structure and form is supported, and is again corrosion resistant principal element.It is high that Si measures, and helps eutectic carbides to present the MC type structure of high rigidity, helps to improve carbide morphology, also help to increase solidity to corrosion, but too high silicon content will reduce toughness, and therefore, it is 1.51%～2.8% more suitable that the content of Si is chosen in.
The main effect of manganese (Mn): Mn is the fining metal matrix, but too high manganese content will make and occur austenite in the structure of cast iron, is unfavorable for anti impact wear-proof, and therefore, it is 0.3%～2.0% more suitable that the content of Mn is chosen in.
The main effect of rare earth element (RE): RE is a refinement cast iron crystal grain, improve carbide morphology and distribution, impel carbide to be isolated shape uniform distribution, significantly reduce inclusion, improve the cast iron metallurgical quality, thereby improved the tired and shock resistance abrasive wear performance of shock resistance of cast iron, but excessive RE will worsen the cast iron quality, reduce toughness, therefore, the content of RE is chosen in 0.01%～0.3% and is advisable.
The main effect of molybdenum (Mo): Mo is a thinning microstructure, improves electropotential and solidity to corrosion, but its price height, therefore, the content of Mo is chosen in 0%～1.0% and is advisable.
Copper (Cu) and nickel (Ni): the main effect of Cu and Ni is a thinning microstructure, improves electropotential, improves solidity to corrosion, but its price height, therefore, Cu content is chosen in 0%～1.0%, and Ni content is chosen in 0%～1.0% and is advisable.
The invention will be further described below in conjunction with embodiment:
Embodiment 1:
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 molten iron reaches 1500 ℃～1550 ℃, use permanent mold casting, teeming temperature is 1400 ℃, after the foundry goods cooling, spruing is cleared up undesirable root, burr, foundry goods is no less than 2 hours simple ageing treatment under room temperature to 300 ℃ temperature.Chemical analysis is carried out in sampling, and its chemical ingredients (weight percentage) is as follows:
C:3.0％ Cr:8.9％ Si:2.2％
Mn:1.1％ RE:0.04％ Mo:0％
Cu:0.2％ Ni:0.1％
All the other are Fe and inevitable trace impurity.
Testing its hardness (HRC) is 52.
The technology of embodiment 2, embodiment 3, embodiment 4 is as described in the embodiment 1, and its chemical ingredients (weight percentage) is as follows:
| Chemical ingredients | C | Cr | Si | Mn | RE | Mo | Cu | Ni | Hardness (HRC) |
| Embodiment 2 | 2.2 | 6.9 | 1.61 | 1.3 | 0.03 | 0 | 0.3 | 0.2 | 51 |
| Embodiment 3 | 3.0 | 9.2 | 2.1 | 0.9 | 0.05 | 0.5 | 0 | 0 | 53 |
| Embodiment 4 | 3.3 | 9.5 | 2.5 | 1.5 | 0.13 | 0.3 | 0.3 | 0.2 | 54 |
All the other are Fe and inevitable trace impurity.
The metallographic structure of cast iron of the present invention is: nodular troostite+carbide, and its carbide overwhelming majority is the MC type structure of high rigidity, is isolated shape uniform distribution, durometer level is HRC48～56.
It is as follows that material of the present invention and high silicon-carbon ratio medium chromium white cast iron are compared its performance:
| Material | The wear-resisting multiplying power of dry grinding | Wet-milling wear-and corrosion-resistant multiplying power | Hardness HRC |
| The high silicon-carbon ratio medium chromium white cast iron | 1.0 | 1.0 | 58 |
| The medium-chrome silicone antifriction cast iron | 1.1 | 1.12 | 53 |
This shows that the wear resistance and corrosion resistance of cast iron of the present invention under condition of impact abrasive all is higher than the high silicon-carbon ratio medium chromium white cast iron.
The present invention compared with prior art has the following advantages:
Cast iron of the present invention is owing to contain a certain amount of rare earth elements RE, the obvious refinement of adding of rare earth element the crystal grain of cast iron, improved hard phase Carbide Morphology and distribution, obviously reduced field trash, thereby improved the metallurgical quality of cast iron. Simultaneously, because the matrix of cast iron of the present invention is the fine pearlite tissue, its shock resistance than martensite+bainite+austenite heterogeneous structure is done, the hygrometric state abrasive wear behavior is more excellent. Therefore, do, under the hygrometric state condition of impact abrasive, cast iron of the present invention has more excellent wear and corrosion behavior and impulse fatigue resistance energy than the high silicon-carbon medium chromium white cast iron. In addition, the present invention only adopts simple aging treatment process, so that the fine pearlite matrix that obtains in as cast condition, after Ageing Treatment, both eliminated the residual stress of foundry goods, also make the matrix of foundry goods remain needed fine pearlite tissue, it is simple for process, low production cost.
Claims (7)
1, a kind of medium-chrome silicone wear and corrosion resistant cast iron is characterized in that the Chemical Composition (weight percentage) of wear and corrosion resistant cast iron comprises:
C:2.1％～3.4％ Cr:5.1％～9.9％
Si:1.51％～2.8％ Mn:0.3％～2.0％
RE:0.01％～0.3％
All the other are Fe and inevitable trace impurity.
2, wear and corrosion resistant cast iron according to claim 1 is characterized in that the Cr content (weight percentage) of above-mentioned erosion resistant cast iron is 6%～8.9%.
3, wear and corrosion resistant cast iron according to claim 1 is characterized in that the Si content (weight percentage) of above-mentioned erosion resistant cast iron is 1.51%～2.4%.
4, wear and corrosion resistant cast iron according to claim 1 is characterized in that the RE content (weight percentage) of above-mentioned erosion resistant cast iron is 0.02%～0.1%.
5, wear and corrosion resistant cast iron according to claim 1 is characterized in that the Chemical Composition (weight percentage) of above-mentioned erosion resistant cast iron comprises:
C:3.0％ Cr:8.9％
Si:2.2％ Mn:1.1％
RE:0.04％
All the other are Fe and inevitable trace impurity.
6, according to claim 1 or 2 or 3 or 4 or 5 described wear and corrosion resistant cast irons, it is characterized in that the Chemical Composition of above-mentioned erosion resistant cast iron also comprises:
Mo:0％～1.0％ Cu:0％～1.0％
Ni:0％～1.0％
7, a kind of manufacture method of producing as the described wear and corrosion resistant cast iron of claim 1～6 is characterized in that can producing with electric furnace, and its processing step is:
(1), with the pig iron, steel scrap, the fusing of various iron alloy Hybrid Heating;
(2), after temperature rises to 1500 ℃～1550 ℃, the cast of coming out of the stove;
(3), with metal mold or sand mold casting, teeming temperature is 1400 ℃～1450 ℃;
(4), after the foundry goods cooling, spruing, cleaning overlap, burr;
(5), foundry goods is no less than 2 hours simple ageing treatment under room temperature to 300 ℃ temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96119062A CN1073639C (en) | 1996-05-06 | 1996-05-06 | Medium-chrome silicone anti-corrosion wear-resisting cast iron and mfg. method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96119062A CN1073639C (en) | 1996-05-06 | 1996-05-06 | Medium-chrome silicone anti-corrosion wear-resisting cast iron and mfg. method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1148633A CN1148633A (en) | 1997-04-30 |
| CN1073639C true CN1073639C (en) | 2001-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN96119062A Expired - Fee Related CN1073639C (en) | 1996-05-06 | 1996-05-06 | Medium-chrome silicone anti-corrosion wear-resisting cast iron and mfg. method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265556B (en) * | 2008-04-18 | 2010-04-21 | 太原科技大学 | Method for producing ultra-high strength chromium series cast iron board band |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101812627A (en) * | 2010-04-29 | 2010-08-25 | 天津水泥工业设计研究院有限公司 | High-tenacity wear-resistant white iron and preparation method thereof |
| CN102296227A (en) * | 2010-06-22 | 2011-12-28 | 樊哲斌 | Novel material of low-chromium cast iron |
| CN102534356A (en) * | 2012-02-13 | 2012-07-04 | 驻马店市永诚耐磨材料有限公司 | Wear-resistant white cast iron material and preparation method thereof |
| CN103422010A (en) * | 2012-05-15 | 2013-12-04 | 汪福海 | Wet mill dedicated liner plate |
| CN103498093A (en) * | 2013-09-29 | 2014-01-08 | 苏州市凯业金属制品有限公司 | High-strength U-shaped metal tube |
| CN103774035B (en) * | 2014-01-15 | 2016-01-06 | 王会智 | A kind of Medium Chrome Cast Iron Grinding Ball and casting process thereof |
| CN104060156A (en) * | 2014-06-05 | 2014-09-24 | 宁国慧宏耐磨材料有限公司 | Special-purpose casting ball for damp mill and machining process thereof |
| CN105621034B (en) * | 2016-01-01 | 2018-06-29 | 广州万粤知识产权运营有限公司 | A kind of rubbish from cooking screw rod compounding conveyer device |
| CN106119683A (en) * | 2016-08-22 | 2016-11-16 | 蚌埠市光辉金属加工厂 | A kind of rigid high-abrasive material of high intensity |
-
1996
- 1996-05-06 CN CN96119062A patent/CN1073639C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265556B (en) * | 2008-04-18 | 2010-04-21 | 太原科技大学 | Method for producing ultra-high strength chromium series cast iron board band |
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| CN1148633A (en) | 1997-04-30 |
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