CN102418030A - Wear-resistant low-chromium ferrous alloy material and production method thereof - Google Patents
Wear-resistant low-chromium ferrous alloy material and production method thereof Download PDFInfo
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- CN102418030A CN102418030A CN2011103800202A CN201110380020A CN102418030A CN 102418030 A CN102418030 A CN 102418030A CN 2011103800202 A CN2011103800202 A CN 2011103800202A CN 201110380020 A CN201110380020 A CN 201110380020A CN 102418030 A CN102418030 A CN 102418030A
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Abstract
The invention relates to a wear-resistant low-chromium ferrous alloy material and a production method thereof. The wear-resistant alloy material which contains elements of Cr, Mo, Ni and the like is mainly used in wear resistant components in the metallurgy industry, the electric power industry, the building industry, the ship industry, the coal industry, the chemical industry, the mine industry and the mechanical industry, such as equipment of a concrete pump truck boom elbow, a mine fragmentation machine and the like. The low-chromium ferrous alloy comprises the following chemical components: 2.4-3.2% of C, 0.85-1.2% of Mo, 4.0-5.0% of Cr, 3.4-4.6% of Ni, 1.1-1.8% of Mn, 1.0-1.5% of Si, 0.13-2.0% of V, and 0.1-0.25% of Cu. According to the wear-resistant low-chromium ferrous alloy material under as-cast or as-cast stress relief processing conditions, the ak is greater than 5J/cm<2> and the HRC value is greater than 55; or the ak is greater than 6J/cm<2> and the HRC value is greater than 60.
Description
Technical field
The invention belongs to a kind of ferrous alloy and method of manufacture thereof; Especially belong to a kind of low ferrochrome base alloy material of abrasion resistance and working method thereof that contains elements such as chromium, molybdenum, nickel, silicon, manganese, boron, vanadium, copper; This wear resistant alloy material is mainly used in the component that resistance to wear of metallurgy, electric power, building, boats and ships, coal, chemical industry, mine and mechanical industry, as is applied to equipment such as concrete pump truck arm bend pipe, mine crushing mechanism.
Background technology
Over past ten years, though the technical gap of having dwindled with Materials science developed country of Chinese wear-resistant material.But the truck manufacturer of China is when selecting for use concrete pump truck arm to use bend pipe, and the high chromium concrete pump truck arm bend pipe of producing because of the high chromium technology of domestic employing (content of chromium is at 20%-30%) is still not strong because of the material fatigue resistence; Wear resistance is relatively poor, and can't reach request for utilization, and it is shorter mainly to show as work-ing life, external (like Germany) buying concrete pump truck arm bend pipe of having no alternative but to comply, or the buying respective material is processed voluntarily.From this type of material of external import, cost is very high, and the cost of a concrete pump truck arm bend pipe of light has just surpassed 2000 yuans.
Low ferrochrome base alloy is a kind of high-abrasive material of cheapness. extensively used industries such as factories and miness mountain, cement.The subject matter that exists during low-chromium white iron uses mainly is that toughness is low, promptly shows as to be prone to fragmentation.Though low-chromium cast-iron has certain rigidity and wear resistance, continuous net-shaped carbide causes the weakness that the toughness of material deposit is little, be prone to brittle failure to the effect of isolating of matrix; In addition, the microstructure of low-chromium cast-iron shows as anisotropy, and performance (mainly being toughness) fluctuation is big, and quality product can not guarantee that these have all limited the use of low-chromium cast-iron., low ferrochrome base alloy is owing to low cost, advantages such as technology is easy, available cupola melting, and low-chromium cast-iron is under low-stress, middle soft abrasive wear situation, and especially cement industry has obtained application, and its market also will constantly enlarge.
Existing the research emphasis of chromium cast iron contained is concentrated on rich chromium cast iron and the medium chrome cast iron less for low chromium (chrome content is less than 5%) wear resistant alloy research and development with low cost, that technology is easy both at home and abroad.
So, be necessary to develop a kind of balance new technology that contains ferrochrome sill hardness and material impact value of keeping preferably, should realize the maximum equilibrium value of material hardness and material impact value, the characteristics that keep with low cost again, technology are easy.
Summary of the invention
The object of the present invention is to provide a kind of impelling strength and hardness value relatively wear-resistant low ferrochrome base alloy material of isostatic and working method thereof.
The technical scheme that realizes goal of the invention is:
In the smelting process of low ferrochrome base alloy, the chemical ingredients (massfraction) of low ferrochrome base alloy is controlled at shown in the following table prescription in the amplitude, promptly in smelting process, let and contain following prescription A or the composition shown in the B of filling a prescription in the wear-resistant low ferrochrome base alloy hot metal:
Normally chemical examination obtains above-mentioned stokehold molten iron data in the stokehold, and the result who promptly obtains through the stokehold chemical examination is adjusted at each constituent content ratio of molten iron shown in the above-mentioned prescription in the scope; Raw material can be materials such as ferrochrome, ferromanganese, molybdenum-iron, ferrosilicon, the pig iron, stainless steel, and optimum is the stainless steel tailing.
The thermal treatment major technique: at first heat up and controlled temperature at 550-650 degree centigrade, insulation is 2-4 hour under this temperature, continues to be warming up to 950-1050 degree centigrade, 2-4 hour cold or air cooling of laggard sector-style of insulation under this temperature, perhaps oil quenching, first-selected oil quenching.
Beneficial effect of the present invention has:
1, because be the low-chromium type iron-based mode of production, middle chromium type of production technique and chromium type high technology are much simple, and middle especially chromium type of required equipment and chromium type high are much simple; Raw materials for production can utilize the tailing of Stainless Steel Products, and production cost is lower.
2, be that BTMNi4Cr2-DT, BTMCr9Ni5 and BTMCr26 make physical property and can be with the correlated result of economic performance with product that the present invention produced and the trade mark:
Product of the present invention shows than improving 8% to 50% the work-ing life of reference substance when carrying out contrasting work-ing life with same based article except that the above-mentioned contrast trade mark, have in addition exceed more than 1 times.
The reason that product of the present invention can prolong than the work-ing life of other like product, through analyzing, one of major reason is:
Product of the present invention at the ak (impelling strength) of as cast condition or as cast condition stress removing state greater than 5J/cm
2, the HRC value is greater than 55; Or at the ak (impelling strength) of sclerosis attitude or sclerosis attitude stress removing greater than 6J/cm
2The HRC value is greater than 60---and this HRC is a golden Combination that can significantly improve low ferrochrome base alloy with the ratio of ak; When outside above-mentioned prescription A or B content, changing, HRC will be inverse change with the ratio of ak, and this kind inverse change all can cause the physicals of low ferrochrome base alloy to reduce; Thereby to the engineering machinery of processing with low ferrochrome base alloy, as producing remarkable disadvantageous effect in work-ing life of concrete pump truck arm bend pipe.
But 3, along with the technological innovation of Chinese concrete pump delivery head; Material to concrete pump truck arm and bend pipe thereof has also proposed higher performance requriements; Domestic many truck manufacturing enterprises are because of purchase less than ideal concrete pump truck arm material at home; Have to German import respective material or accessory, reach more satisfactory situation the work-ing life of ability basic guarantee concrete pump truck arm bend pipe from prosperity.Concrete pump truck arm bend pipe with the wear-resistant low ferrochrome base alloy of the present invention's production is processed is compared with the reference substance from external import; Cost can reduce by 40% to 60%; Work-ing life and imported materials and items compare experiment, the result in 100 laboratory samples shows as: 5% probability is arranged, and both maintain an equal level; There is the probability more than 70% long by 10% to 50% than reference substance; There is the probability more than 25% long by 30% to 120% than reference substance.
4, the concrete pump truck arm bend pipe of producing with the present invention technology can be exchanged old for new or in time melts down smelting after being scrapped, and can significantly reduce truck user's running cost; And, just can't make the truck user enjoy this benefit when concrete pump truck arm during from external import.
5, because of technology of the present invention belongs to the low-chromium cast-iron technical field, do not need with middle chromium or the such high working condition of high chromium, this is the major reason that can reduce production costs.
6, warp is tested repeatedly and is shown, HRC in the physicals of the wear-resistant material that the low ferrochrome base alloy of producing shown in filling a prescription by the present invention is processed and the ratio of ak are the important factors that ensures the prolongation in work-ing life of wear-resistant mechanical fitting.
In sum, the enforcement of technical scheme of the present invention can produce remarkable economic efficiency and social benefit.
Embodiment
Prescription 1: carbon 2.8%, molybdenum 1.0%, chromium 4.8%, nickel 3.5%, manganese 1.15%, silicon 1.1%, vanadium 0.15%, copper 0.15%, sulphur and phosphorus are controlled at below 0.025% respectively; All the other can contain other smelt additive for iron and the impurity that contains the technological standard permission.
Prescription 2: carbon 2.8%, molybdenum 1.2%, chromium 5.0%, nickel 4.5%, manganese 1.8%, silicon 1.5%, boron 0.2%, vanadium 0.2%, copper 0.2%, sulphur and phosphorus are controlled at below 0.015% respectively; All the other can contain other smelt additive for iron and the impurity that contains the technological standard permission.
Prescription 3: carbon 3.0%, molybdenum 0.8%, chromium 3.8%, nickel 2.8%, manganese 1.2%, silicon 1.1%, boron 0.12%, vanadium 0.15%, copper 0.1%, sulphur and phosphorus are controlled at below 0.015% respectively; All the other can contain other smelt additive for iron and the impurity that contains the technological standard permission.
Above-mentioned prescription is mass percent.Optional one of them prescription, melts as main raw material like stainless steel main starting material with intermediate frequency furnace; Carbon content is controlled between 2.6% to 3%, adds other alloying element by prescription requirements then, with each constituent content of molten iron in the stove be adjusted to above-mentioned each fill a prescription consistent; Consider the valuable and easy scaling loss of nickel element, nickel element in the end adds, and Control for Kiln Temperature is in 1600 deg.c; After treating that each element reaches the prescription requirement, be cast into product.
The thermal treatment gordian technique: at first intensification and controlled temperature continue be warming up to 950-1050 degree centigrade in insulation under this temperature after 2-4 hour at 550-650 degree centigrade, carry out oil quenching in insulation under this temperature after 2-4 hour.
The technology of not chatting and arriving is accomplished with reference to routine techniques.Low ferrochrome base heat treatment of alloy technology according to the invention except the heat treatment technics that employing the present invention addresses, can also be used conventional heat treatment technics.
The material that the present invention produced is applicable to the wear-resistant accessory of industries such as metallurgy, building materials, electric power, building, boats and ships, coal, chemical industry and machinery, especially heavily is applicable to make concrete pump truck arm bend pipe, abrading-ball, the straight roller of goblin, roll, the pump housing etc.
Claims (8)
1. wear-resistant low ferrochrome base alloy material; Its chemical ingredients contains iron, chromium, molybdenum, nickel, silicon, manganese, boron, vanadium, copper, sulphur, phosphorus; With unavoidable impurities and/or smelt additive, it is characterized in that containing in the said wear-resistant low ferrochrome base alloy following chemical ingredients (mass percent):
Carbon 2.4-3.2%, molybdenum 0.85-1.2%, chromium 4.0-5.0%, nickel 3.4-4.6%, manganese 1.1-1.8%, silicon 1.0-1.5%, vanadium 0.13-2.0%, copper 0.1-0.25%.
2. wear-resistant low ferrochrome base alloy material as claimed in claim 1 is characterized in that containing in the said wear-resistant low ferrochrome base alloy material following chemical ingredients (mass percent):
1) carbon 2.8%, molybdenum 1.0%, chromium 4.8%, nickel 3.5%, manganese 1.15%, silicon 1.1%, vanadium 0.15%, copper 0.15%; Perhaps
2) carbon 2.8%, molybdenum 1.2%, chromium 5.0%, nickel 4.5%, manganese 1.8%, silicon 1.5%, boron 0.2%, vanadium 0.2%, copper 0.2%; Perhaps
3) carbon 3.0%, molybdenum 0.8%, chromium 3.8%, nickel 2.8%, manganese 1.2%, silicon 1.1%, boron 0.12%, vanadium 0.15%, copper 0.1%.
3. the working method of a wear-resistant according to claim 1 low ferrochrome base alloy material; It is characterized in that smelting in the kind; Hot metal composition (mass percent) to wear-resistant low ferrochrome base alloy is adjusted in the following amplitude, contains following compositions in the said wear-resistant low ferrochrome base alloy material so that let:
Carbon 2.4-3.2%, molybdenum 0.85-1.2%, chromium 4.0-5.0%, nickel 3.4-4.6%, manganese 1.1-1.8%, silicon 1.0-1.5%, vanadium 0.13-2.0%, copper 0.1-0.25%.
4. wear-resistant low ferrochrome base alloy material working method as claimed in claim 1; In it is characterized in that smelting kind, with hot metal composition carry out to whole content of elements in any shown in following arbitrary prescription or more than two within 7% about adjustment (mass percent):
1) carbon 2.8%, molybdenum 1.0%, chromium 4.8%, nickel 3.5%, manganese 1.15%, silicon 1.1%, vanadium 0.15%, copper 0.15%;
2) carbon 2.8%, molybdenum 1.2%, chromium 5.0%, nickel 4.5%, manganese 1.8%, silicon 1.5%, boron 0.2%, vanadium 0.2%, copper 0.2%;
3) carbon 3.0%, molybdenum 0.8%, chromium 3.8%, nickel 2.8%, manganese 1.2%, silicon 1.1%, boron 0.12%, vanadium 0.15%, copper 0.1%.
5. wear-resistant low ferrochrome base alloy material working method as claimed in claim 4; It is characterized in that in smelting kind; The hot metal composition (mass percent) of wear-resistant low ferrochrome base alloy be adjusted to shown in following any prescription become component, contain following compositions in the said wear-resistant low ferrochrome base alloy material so that let:
1) carbon 2.8%, molybdenum 1.0%, chromium 4.8%, nickel 3.5%, manganese 1.15%, silicon 1.1%, vanadium 0.15%, copper 0.15%;
2) carbon 2.8%, molybdenum 1.2%, chromium 5.0%, nickel 4.5%, manganese 1.8%, silicon 1.5%, boron 0.2%, vanadium 0.2%, copper 0.2%;
3) carbon 3.0%, molybdenum 0.8%, chromium 3.8%, nickel 2.8%, manganese 1.2%, silicon 1.1%, boron 0.12%, vanadium 0.15%, copper 0.1%.
6. concrete pump truck arm bend pipe of processing with the said wear-resistant low ferrochrome base alloy material of claim 1; Or abrading-ball; Or the straight roller of goblin; Or the roll or the pump housing, it is characterized in that the chemical ingredients of the straight roller of described concrete pump truck arm bend pipe or abrading-ball or goblin or the roll or the pump housing contains (mass percent):
Carbon 2.4-3.2%, molybdenum 0.85-1.2%, chromium 4.0-5.0%, nickel 3.4-4.6%, manganese 1.1-1.8%, silicon 1.0-1.5%, vanadium 0.13-2.0%, copper 0.1-0.25%.
7. concrete pump truck arm bend pipe of processing with the said wear-resistant low ferrochrome base alloy material of claim 2; Or abrading-ball; Or the straight roller of goblin; Or roll, or the pump housing, it is characterized in that the chemical ingredients of the straight roller of described concrete pump truck arm bend pipe or abrading-ball or goblin or the roll or the pump housing contains (mass percent):
1) carbon 2.8%, molybdenum 1.0%, chromium 4.8%, nickel 3.5%, manganese 1.15%, silicon 1.1%, vanadium 0.15%, copper 0.15%; Perhaps
2) carbon 2.8%, molybdenum 1.2%, chromium 5.0%, nickel 4.5%, manganese 1.8%, silicon 1.5%, boron 0.2%, vanadium 0.2%, copper 0.2%; Perhaps
3) carbon 3.0%, molybdenum 0.8%, chromium 3.8%, nickel 2.8%, manganese 1.2%, silicon 1.1%, boron 0.12%, vanadium 0.15%, copper 0.1%.
8. wear-resistant low ferrochrome base alloy material working method as claimed in claim 1 is characterized in that the method when said wear-resistant low ferrochrome base alloy material heat-treated is:
At first intensification and controlled temperature continue be warming up to 950-1050 degree centigrade in insulation under this temperature after 2-4 hour at 550-650 degree centigrade, carry out oil quenching in insulation under this temperature after 2-4 hour.
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| CN 201110380020 CN102418030B (en) | 2011-11-25 | 2011-11-25 | Wear-resistant low-chromium ferrous alloy material and production method thereof |
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| CN102418030B CN102418030B (en) | 2013-07-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103757527A (en) * | 2013-12-13 | 2014-04-30 | 芜湖金鹰机械科技开发有限公司 | Wear-resistance medium-chromium multi-element alloy casting ball material and preparation method thereof |
| CN103757521A (en) * | 2013-12-13 | 2014-04-30 | 芜湖金鹰机械科技开发有限公司 | Multi-element alloy casting ball material and preparation method thereof |
| CN107739973A (en) * | 2017-10-23 | 2018-02-27 | 宁国市正兴耐磨材料有限公司 | A kind of high tenacity corrosion resistant wear-resistant ball and its production technology |
| CN114351037A (en) * | 2021-11-30 | 2022-04-15 | 宁国市华丰耐磨材料有限公司 | High-toughness low-chromium white cast iron grinding section |
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| CN1069291A (en) * | 1991-08-08 | 1993-02-24 | 威海玻璃厂 | A kind of wearable cast steel |
| CN1100150A (en) * | 1993-09-09 | 1995-03-15 | 株洲市机械工业研究所 | Impact fatigue-resistant wear-proof alloy cast iron |
| US20050189045A1 (en) * | 2004-03-01 | 2005-09-01 | Takemori Takayama | Ferrous seal sliding parts and producing method thereof |
| CN102220542A (en) * | 2011-05-31 | 2011-10-19 | 长春工业大学 | Industrial production method of chromium-free white cast iron with high wear resistance |
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2011
- 2011-11-25 CN CN 201110380020 patent/CN102418030B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069291A (en) * | 1991-08-08 | 1993-02-24 | 威海玻璃厂 | A kind of wearable cast steel |
| CN1100150A (en) * | 1993-09-09 | 1995-03-15 | 株洲市机械工业研究所 | Impact fatigue-resistant wear-proof alloy cast iron |
| US20050189045A1 (en) * | 2004-03-01 | 2005-09-01 | Takemori Takayama | Ferrous seal sliding parts and producing method thereof |
| CN102220542A (en) * | 2011-05-31 | 2011-10-19 | 长春工业大学 | Industrial production method of chromium-free white cast iron with high wear resistance |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103757527A (en) * | 2013-12-13 | 2014-04-30 | 芜湖金鹰机械科技开发有限公司 | Wear-resistance medium-chromium multi-element alloy casting ball material and preparation method thereof |
| CN103757521A (en) * | 2013-12-13 | 2014-04-30 | 芜湖金鹰机械科技开发有限公司 | Multi-element alloy casting ball material and preparation method thereof |
| CN107739973A (en) * | 2017-10-23 | 2018-02-27 | 宁国市正兴耐磨材料有限公司 | A kind of high tenacity corrosion resistant wear-resistant ball and its production technology |
| CN114351037A (en) * | 2021-11-30 | 2022-04-15 | 宁国市华丰耐磨材料有限公司 | High-toughness low-chromium white cast iron grinding section |
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