CN102534402B - Preparation method for wear-resistant alloy steel - Google Patents
Preparation method for wear-resistant alloy steel Download PDFInfo
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- CN102534402B CN102534402B CN 201210020354 CN201210020354A CN102534402B CN 102534402 B CN102534402 B CN 102534402B CN 201210020354 CN201210020354 CN 201210020354 CN 201210020354 A CN201210020354 A CN 201210020354A CN 102534402 B CN102534402 B CN 102534402B
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Abstract
The invention discloses a preparation method for wear-resistant alloy steel. The wear-resistant alloy steel contains the following components by weight percent: 0.4 to 0.6 percent of C; 1.0 to 1.2 percent of B; 1.8 to 2.2 percent of Si; 2.4 to 2.8 percent of Cr; 1.3 to 1.5 percent of Mn; 0.08 to 0.12 percent of Ce; 0.2 to 0.3 percent of V; 0.03 to 0.15 percent of Ti; 0.005 to 0.01 percent of N; 0 to 0.05 percent of P; 0 to 0.05 percent of S; and Fe in balancing amount. The preparation method comprises the following steps: melting molten steel, adjusting the components before a furnace to be qualified, and heating to 1580 to 1600 DEG C; adding aluminum for de-oxygenation, wherein the quantity of the added aluminum is 0.15 to 0.30 percent that of the molten steel, and discharging; conducting combined modification on the molten steel with cerium-based tombar thite, ferrotitanium and ferrovanadium; casting the molten steel into casts after the modification; after austenitizing for 2 to 4 hours under the condition of 960 to 980 DEG C, conducting isothermal quenching on the casts directly in an isothermal salt bath furnace of which the temperature ranges from 310 to 330 DEG C; insulating for 2 to 4 h; and conducting air cooling on the casts to ensure that the temperature of the casts is the same as the room temperature.
Description
Technical field
The present invention relates to iron and steel domain, particularly a kind of preparation method of wear-resisting alloy steel.
Background technology
Wearing and tearing are many industrial sector ubiquities and become a major reason that causes equipment failure or material damage that it has also consumed a large amount of energy and material simultaneously.The various engineering excavation machines of being made by wear-resistant alloy cast steel and shovel loader bucket tooth, various Wearproof transfer piping made, various grinder hammerhead and jaw, various grip-pad, owing to be in the working conditions such as high strength, atrocious weather, its wear pattern is more serious.
The present state of the art is: a class is to emphasize the high tenacity of material, and a class is to emphasize the resistance to abrasion of material.And can't reach an effectively unification, especially in the application that is used on the engineering machinery such as outdoor mining, excavation.The wear resistance of high mangaenese steel is with good conditionsi, and its yield strength is low, easily deformable; Low, interalloy wear resisting steel has preferably obdurability, and the wear resistance under low, the middle shock load is better than high mangaenese steel, but has hardening capacity and the low problem of hardenability, and wear resistance is relatively poor; Contain in the rich chromium cast iron tissue and surpass 20% high rigidity eutectic carbides, have excellent wear resistance, alloying element content is high, production cost is high and the deficiency of the yielding cracking of high-temperature heat treatment but exist; Ordinary white cast iron and low-alloy chilled cast iron carbide hardness are low, and carbide is continuous shape and distributes, and fragility is large, easily peel off in the use even ftracture.
For present situation, obtain that a kind of production technique is simple, cost is low, obdurability is high, hardening capacity and hardenability be good and pollution-free, guarantee simultaneously the works fine in low temperature environment, and become a technical problem at the lower wear-resistant alloy cast steel that also can well use of multiplex (MUX) ore deposit condition.Simultaneously people recognize that also the thermal treatment process that provides a kind of new alloying constituent with wear-resistant alloy cast steel to adapt is not only the sport technique segment of making wear-resistant alloy cast steel, simultaneously, reasonably thermal treatment process also will have positive effect to the mechanical property of wear-resistant alloy cast steel, and alloying constituent is used more effectively.
Summary of the invention
For the deficiencies in the prior art, one of purpose of the present invention is to provide a kind of preparation method of wear-resisting alloy steel.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of preparation method of wear-resisting alloy steel is characterized in that, described wear-resisting alloy steel is comprised of following component by weight percentage: C:0.4～0.6%, B:1.0～1.2%, Si:1.8～2.2%, Cr:2.4～2.8%, Mn:1.3～1.5%, Ce:0.08～0.12%, V:0.2～0.3%, Ti:0.03～0.15%, N 0.005～0.01%, P＜0.05%, S＜0.05%, surplus is Fe, and described preparation method is:
1. with steel scrap, ferro-boron, ferrosilicon, ferrochrome and ferromanganese, put into electric furnace after adjusting its carbon content with barren rock electrode ink or the pig iron, after molten steel fusing, stokehold adjusting component are qualified, temperature is risen to about 1580～1600 ℃, add the aluminium deoxidation that accounts for steel quality 0.15%～0.30%, then come out of the stove;
2. cerium base rare earth, ferrotianium and vanadium iron are crushed to granularity less than the fritter of 15mm, after oven dry about 180～200 ℃, place the casting ladle bottom, with pouring method in the bag molten steel composite inoculating is processed; After rotten the processing pouring molten steel is become foundry goods;
3. foundry goods is in about 960～980 ℃, behind austenitizing 2～4h, directly carries out isothermal quenching in temperature is isothermal salt bath furnace about 310～330 ℃, soaking time 2～4h, and air cooling namely gets the good wear-resisting alloy steel of obdurability and wear resistance to room temperature subsequently.
Beneficial effect of the present invention is:
Wear-resisting alloy steel of the present invention can form the iron boron compound of high rigidity by adding B, V and three kinds of elements of N, and the vanadium nitrogen compound can obviously improve steel hardness and improve the steel wear resistance.After the above-mentioned thermal treatment of wear-resisting alloy steel process of the present invention, its tensile strength: 1300-1500MPa, yield strength: 950-1050MPa, unit elongation: δ s 8-10%, v-notch impelling strength Akv35-40J, hardness: 52-56HRC.Be suitable for the application of various engineering excavation machines and shovel loader bucket tooth, various Wearproof transfer piping made, various grinder hammerhead and the parts such as jaw, various grip-pads.
Embodiment
Embodiment one
A kind of preparation method of wear-resisting alloy steel, described wear-resisting alloy steel is comprised of following component by weight percentage: C:0.4%, B:1.2%, Si:1.8%, Cr:2.8%, Mn:1.3%, Ce:0.12%, V:0.2%, Ti:0.15%, N 0.005%, P＜0.05%, S＜0.05%, surplus are Fe, and described preparation method is:
1. with steel scrap, ferro-boron, ferrosilicon, ferrochrome and ferromanganese, put into electric furnace after adjusting its carbon content with barren rock electrode ink or the pig iron, after molten steel fusing, stokehold adjusting component are qualified, temperature is risen to 1580 ℃, add the aluminium deoxidation that accounts for steel quality 0.30%, then come out of the stove;
2. cerium base rare earth, ferrotianium and vanadium iron are crushed to granularity less than the fritter of 15mm, after 180 ℃ of oven dry, place the casting ladle bottom, with pouring method in the bag molten steel composite inoculating is processed; After rotten the processing pouring molten steel is become foundry goods;
3. foundry goods is in 960 ℃, behind the austenitizing 4h, directly carries out isothermal quenching in temperature is 310 ℃ isothermal salt bath furnace, soaking time 4h, and air cooling namely gets the good wear-resisting alloy steel of obdurability and wear resistance to room temperature subsequently.
Embodiment two
A kind of preparation method of wear-resisting alloy steel, described wear-resisting alloy steel is comprised of following component by weight percentage: C:0.6%, B:1.0%, Si:2.2%, Cr:2.4%, Mn:1.5%, Ce:0.08%, V:0.3%, Ti:0.03%, N 0.01%, P＜0.05%, S＜0.05%, surplus are Fe, and described preparation method is:
1. with steel scrap, ferro-boron, ferrosilicon, ferrochrome and ferromanganese, put into electric furnace after adjusting its carbon content with barren rock electrode ink or the pig iron, after molten steel fusing, stokehold adjusting component are qualified, temperature is risen to 1600 ℃, add the aluminium deoxidation that accounts for steel quality 0.15%, then come out of the stove;
2. cerium base rare earth, ferrotianium and vanadium iron are crushed to granularity less than the fritter of 15mm, after 200 ℃ of oven dry, place the casting ladle bottom, with pouring method in the bag molten steel composite inoculating is processed; After rotten the processing pouring molten steel is become foundry goods;
3. foundry goods is in 980 ℃, behind the austenitizing 2h, directly carries out isothermal quenching in temperature is 330 ℃ isothermal salt bath furnace, soaking time 2h, and air cooling namely gets the good wear-resisting alloy steel of obdurability and wear resistance to room temperature subsequently.
Embodiment three
A kind of preparation method of wear-resisting alloy steel, described wear-resisting alloy steel is comprised of following component by weight percentage: C:0.5%, B:1.1%, Si:2.0%, Cr:2.6%, Mn:1.4%, Ce:0.10%, V:0.25%, Ti:0.09%, N 0.008%, P＜0.05%, S＜0.05%, surplus are Fe, and described preparation method is:
1. with steel scrap, ferro-boron, ferrosilicon, ferrochrome and ferromanganese, put into electric furnace after adjusting its carbon content with barren rock electrode ink or the pig iron, after molten steel fusing, stokehold adjusting component are qualified, temperature is risen to 1590 ℃, add the aluminium deoxidation that accounts for steel quality 0.23%, then come out of the stove;
2. cerium base rare earth, ferrotianium and vanadium iron are crushed to granularity less than the fritter of 15mm, after 190 ℃ of oven dry, place the casting ladle bottom, with pouring method in the bag molten steel composite inoculating is processed; After rotten the processing pouring molten steel is become foundry goods;
3. foundry goods is in 970 ℃, behind the austenitizing 3h, directly carries out isothermal quenching in temperature is 320 ℃ isothermal salt bath furnace, soaking time 3h, and air cooling namely gets the good wear-resisting alloy steel of obdurability and wear resistance to room temperature subsequently.
Applicant's statement, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, does not mean that namely the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.The person of ordinary skill in the field should understand, any improvement in the present invention to the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (1)
1. the preparation method of a wear-resisting alloy steel, described wear-resisting alloy steel is comprised of following component by weight percentage: C:0.5%, B:1.1%, Si:2.0%, Cr:2.6%, Mn:1.4%, Ce:0.10%, V:0.25%, Ti:0.09%, N0.008%, P＜0.05%, S＜0.05%, surplus are Fe, and described preparation method is:
1. with steel scrap, ferro-boron, ferrosilicon, ferrochrome and ferromanganese, put into electric furnace after adjusting its carbon content with barren rock electrode ink or the pig iron, after molten steel fusing, stokehold adjusting component are qualified, temperature is risen to 1590 ℃, add the aluminium deoxidation that accounts for steel quality 0.23%, then come out of the stove;
2. cerium base rare earth, ferrotianium and vanadium iron are crushed to granularity less than the fritter of 15mm, after 190 ℃ of oven dry, place the casting ladle bottom, with pouring method in the bag molten steel composite inoculating is processed; After rotten the processing pouring molten steel is become foundry goods;
3. foundry goods is in 970 ℃, behind the austenitizing 3h, directly carries out isothermal quenching in temperature is 320 ℃ isothermal salt bath furnace, soaking time 3h, and air cooling namely gets the good wear-resisting alloy steel of obdurability and wear resistance to room temperature subsequently.
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| CN102534402B true CN102534402B (en) | 2013-10-30 |
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| CN103243204A (en) * | 2013-05-13 | 2013-08-14 | 哈尔滨工业大学 | Strengthening and toughening heat treatment method of medium carbon manganese-vanadium low alloy steel |
| CN103266275A (en) * | 2013-05-23 | 2013-08-28 | 江苏久联冶金机械制造有限公司 | Boron-containing high-silicon case steel material and isothermal quenching method |
| CN103789616B (en) * | 2014-01-24 | 2015-12-09 | 李露青 | A kind of carbon steel work-piece for speed skate blade |
| CN105779891B (en) * | 2016-04-15 | 2018-01-05 | 芜湖德业摩擦材料有限公司 | A kind of preparation method of high rigidity brake pad for brake block |
| CN106978568B (en) * | 2017-05-25 | 2019-01-25 | 宜昌楚疆铸造有限公司 | One kind stirring leaf wear-resisting low-carbon alloy steel material and preparation method thereof |
| CN108220817A (en) * | 2017-08-13 | 2018-06-29 | 广东省材料与加工研究所 | A kind of boracic wear-resisting alloy steel and preparation method thereof |
| CN111154952A (en) * | 2020-01-16 | 2020-05-15 | 上海工程技术大学 | Isothermal heat treatment process for high-wear-resistance loader bucket parts |
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| CN100519814C (en) * | 2006-06-16 | 2009-07-29 | 株式会社神户制钢所 | Non-hardened and tempered steel plate with high yield strength |
| CN100532619C (en) * | 2008-04-25 | 2009-08-26 | 北京工业大学 | High-boron low-carbon abrasion resistant cast steel and heat treatment method thereof |
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