CN103215526B - Centrifugally-cast high-carbon high-alloy steel and heat treatment method thereof - Google Patents
Centrifugally-cast high-carbon high-alloy steel and heat treatment method thereof Download PDFInfo
- Publication number
- CN103215526B CN103215526B CN201310145436.5A CN201310145436A CN103215526B CN 103215526 B CN103215526 B CN 103215526B CN 201310145436 A CN201310145436 A CN 201310145436A CN 103215526 B CN103215526 B CN 103215526B
- Authority
- CN
- China
- Prior art keywords
- alloy steel
- soaking time
- carbon
- tempering
- heat treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to centrifugally-cast high-carbon high-alloy steel and a heat treatment method thereof. The high-carbon high-alloy steel contains the following chemical ingredients in percentage by weight: 1.5-3.8% of C, 2-10% of W, 3-10% of Cr, 2-8% of Mo, 4-10% of V, 0-3% of Nb, 0.2-0.8% of Mn, 0.1-0.4% of RE, not higher than 1.0% of Si, not higher than 0.8% of Al, not higher than 0.3% of Ni and the balance of Fe and trace unavoidable impurities. The heat treatment method sequentially comprises a quenching and tempering treatment step, a solid solution strengthening treatment step and a dispersion strengthening treatment step. The high-carbon high-alloy steel takes martensite as a matrix, contains a large number of carbide hard phases and has good abrasion resistance; the heat treatment method has the advantages that the heat treatment cycle is greatly shortened, the work efficiency is increased, and the production cost is reduced; and after the high-carbon high-alloy steel is treated by the method, the distribution of the carbide tissue is uniform, and the surface quality is good.
Description
Technical field
The invention belongs to technical field of metal material heat treatment, particularly a kind of high-carbon high-alloy material and heat treating method thereof adopting rotary casting.
Background technology
Industrial application rotary casting high-carbon high-alloy material is generally containing elements such as a large amount of W, Cr, Mo, V, and alloying element specific gravity difference is large, occurs segregation, causes cast alloy steel overall performance greatly to reduce in using.Thermal treatment can change high-carbon high-alloy steel microtexture, adjustment distribution of carbides state, but due to material chemical composition difference different with casting condition, corresponding heat treating regime is completely different.Chinese invention patent CN101240402A discloses " a kind of composite roll cast high-boron high-speed steel and heat treating method thereof ", material composition per-cent is C0.2-1.0%, B1.0-2.5%, Cr3.5-5.0%, Si0.5-0.9%, Mn0.6-1.3%, V2.0-10%, Ni0.5-1.5%, Mo1.0-4.0%, W0.2-4.0%, Nb0.1-2.0%, S≤0.04%, P≤0.04%, all the other are Fe, after 860-880 DEG C of annealing, 1020-1150 DEG C quenching and 500-550 DEG C of double tempering technique, material hardness is 56.3HRC, and impelling strength is 10.6J/cm
2, fracture toughness property 24.5MPam
1/2, tensile strength 828MPa, wear resistance, shock resistance increase substantially.Chinese patent " a kind of low crack type high speed steel roll and centre spinning method thereof ", publication number CN1803339A, its chemical component weight per-cent is: C1.5-2.0%, W3.0-6.0%, Mo1.5-3.0%, V3.0-10%, B1.0-2.5%, Cr3.5-10.0%, Ni1.5-3.0%, Mn < 1.5%, Si < 1.5%, RE0.08-0.20%, K0.05-0.15%, Mg0.04%-0.10%, wherein 0.20% < RE+K+Mg < 0.40%, all the other are Fe and inevitable trace impurity, heat-treat after rotary casting, heat treating regime is 950-1150 DEG C of normalizing and 500-600 DEG C of tempering, hardness is 65.4HRC, tensile strength is 1245MPa, impelling strength is 16.3J/cm
2, fracture toughness property is 36.8MPam
1/2', the roll material that this invention obtains has good work-ing life.In order to obtain more high rigidity and wear resistance, generally need to improve carbon and alloying element content, when carbon content increases, often cause material to occur crackle because heat treating regime is improper in heat treatment process, existing heat treating regime is difficult to be applied in casting high-carbon high-alloy material heat treatment.
Summary of the invention
The object of the invention is to provide a kind of rotary casting high-carbon high-alloy steel, and be matrix with martensite in this high-carbon high-alloy steel, containing a large amount of carbide hard phase, hardness is high, and product hardness reaches 67-69HRC, has good wear resisting property.
Another object of the present invention is also the heat treating method providing above-mentioned high-carbon high-alloy steel, high-carbon high-alloy steel after the method thermal treatment, carbide tissue distribution is even, surface quality is good, occur without any crackle, hardness improves obviously, and substantially reduces heat treatment cycle, increase work efficiency, reduce production cost.
For reaching above technical purpose, the invention provides following technical scheme:
A kind of rotary casting high-carbon high-alloy steel, its chemical composition and weight percent are: C1.5-3.8%, W2-10%, Cr3-10%, Mo2-8%, V4-10%, Nb0-3%, Mn0.2-0.8%, RE0.1-0.4%, Si≤1.0%, Al≤0.8%, Ni≤0.3%, surplus is Fe and the inevitable impurity of trace.Described rotary casting high-carbon high-alloy steel main raw material by weight ratio composition and preparation technology as follows:
1) by 800 parts of rollings top steel scrap, the commercially available ferrotungsten of 20-130 part (W content 75-85%), the commercially available extra low carbon ferrochromium of 40-150 part (chromium content 70-75%, carbon content is less than 0.15%), the commercially available molybdenum-iron of 30-130 part (molybdenum content 60-70%), the commercially available vanadium iron of 50-145 part (content of vanadium 70-80%) is main raw material, and the commercially available pig iron of 350-1200 part (carbon content 3-4%) or 10-35 part graphite are carburelant, and Hybrid Heating is fused into molten steel.After molten steel is melting down, adds the commercially available ferrosilicon of 30-100 part (silicone content 8-10%) and carry out pre-deoxidation, add 1-8 part aluminium block and carry out final deoxygenation.
2) stokehold adjusting component qualified after be warming up to 1600-1650 DEG C, then come out of the stove.Adding 1-13 part particle size after cracking is the commercially available rare earth ferrosilicon alloy fritter of 6-18mm (content of rare earth 30-40%), rare earth ferrosilicon alloy fritter is dried through 160-240 DEG C to be placed on bottom casting ladle, carry out Metamorphism treatment with pouring method in bag to molten steel, high-carbon high-alloy steel molten steel is prefabricated to be completed.
3) be poured into by prefabricated molten steel in the horizontal centrifugal casting machine with certain rotation speed and carry out rotational casting, casting mold adopts double-level-metal type, and paintcast adopts water carrier coating (containing 93-95% silica powder, 5-7% water glass and water).Spray material when casting mold being preheating to 160-260 DEG C, paint thickness is 2-5mm, after completing, is heated to 220-340 DEG C and eliminates moisture in coating.
4) after rotational casting completes, when its temperature takes out foundry goods lower than when 100 DEG C.
The heat treating method of described high-carbon high-alloy steel comprises modifier treatment, solution strengthening process, dispersion-strengthened process successively.
The modifier treatment process of described high-carbon high-alloy steel is as follows: quenching temperature 920-960 DEG C, soaking time t
1=(1.5-2.0) δ+150, oil cooling to room temperature, cooling rate 50-80 DEG C/S; Tempering temperature 720-760 DEG C, soaking time t
2=(1.0-1.5) δ+120, after stove is as cold as 500 DEG C, the cold or air cooling of stove.T
1for Tempering and Quenching Quenching Soaking Time, min; t
2for Tempering and Quenching tempering insulation time, min; δ is thickness of workpiece, mm.
The solution strengthening treating processes of described high-carbon high-alloy steel is as follows: holding temperature 960-1020 DEG C, soaking time t
3=(1.5-2.0) δ+80, oil cooling to room temperature, cooling rate 80-100 DEG C/S.T
3for solution strengthening soaking time, min; δ is thickness of workpiece, mm.After solution strengthening process, hardness is 65-67HRC, and bending strength is 950-1100MPa.
The dispersion-strengthened treating processes of described high-carbon high-alloy steel is as follows: Tempering temperature 340-380 DEG C, soaking time t
4=(1.0-1.5) δ+50, air cooling.T
4be a tempering insulation time, min; δ is thickness of workpiece, mm.After a dispersion-strengthened process, hardness is 63-65HRC, and bending strength is 1350-1420Mpa.Double tempering temperature is 520-560 DEG C, soaking time t
5=(1.0-1.5) δ+50, air cooling.T
5for double tempering soaking time, min; δ is thickness of workpiece, mm.After secondary disperse process, hardness is 67-69HRC, and bending strength is 1450-1500Mpa.
The present invention compared with prior art, has following beneficial effect:
1) be matrix with martensite in high-carbon high-alloy steel of the present invention, containing a large amount of carbide hard phase, hardness is high, and product hardness reaches 67-69HRC, has good wear resisting property.
2) heat treating regime in the present invention, quenching-and-tempering process replaces the isothermal annealing thermal treatment process in general rotary casting high-carbon high-alloy steel heat treatment process, substantially reduces heat treatment cycle, increases work efficiency.
3), there is secondary hardening phenomenon in the heat treating regime in the present invention, hardness improves obviously during disperse heat treatment process.
4) heat treating regime in the present invention, carbide tissue distribution is even, and substantially reduce segregation phenomena, surface quality is good, occurs without any crackle.
5) the present invention adopts centrifugal casting apparatus simple, and low production cost, thermal treatment is carried out in conventional electric furnace, and equipment interoperability is strong.
Embodiment
One, the preparation of high-carbon high-alloy steel
Embodiment 1
Adopt 500 kg capacity medium-frequency induction furnace meltings, relate to component as follows with concrete preparation technology by weight ratio:
By 800 parts of used to roll seamless steel tube top steel scraps, (carbon content is 0.15%, chromium content is 1.0%, and molybdenum content is 0.3%, and W content is 0.6%, nickel content is 0.3%), 50 parts of commercially available W contents are the ferrotungsten of 80%, and 55 parts of commercially available chromium content are 70%, and carbon content is the extra low carbon ferrochromium of 0.08%, 55 parts of commercially available molybdenum content are the molybdenum-iron of 65%, 72 parts of commercially available content of vanadium be 75% vanadium iron be main raw material, 20 parts of commercially available graphite are carburelant, and Hybrid Heating is fused into molten steel.After molten steel is melting down, add 50 parts of commercially available silicone contents be 8% ferrosilicon carry out pre-deoxidation, add 5 parts of aluminium blocks and carry out final deoxygenation.
Come out of the stove after being warming up to 1620 DEG C after stokehold adjusting component is qualified.Adding 1 part of particle size after cracking is 8-12mm, content of rare earth is the commercially available rare earth ferrosilicon alloy fritter of 30%, rare earth ferrosilicon alloy fritter is dried through 200 DEG C to be placed on bottom casting ladle, and carry out Metamorphism treatment with pouring method in bag to molten steel, the prefabricated operation of high-carbon high-alloy steel molten steel completes.
Prefabricated molten steel being poured into rotational casting in horizontal centrifugal casting machine becomes external diameter to be 145mm, internal diameter 115mm, and thickness is the high-carbon high-alloy steel pipe of 30mm.Centrifugal casting casting mold adopts double-level-metal type, and paintcast adopts water carrier coating, and its composition is silica powder, 6% water glass and the water of 94%.Spray material when casting mold being preheating to 180 DEG C, paint thickness is 4mm, after completing, is heated to 260 DEG C and eliminates moisture in coating.Take out high-carbon high-alloy steel pipe foundry goods when its temperature is 90 DEG C, rotational casting operation completes.
Its rotary casting high-carbon high-alloy composition of steel is: C2.15%, W3.95%, Cr3.95%, Mo3.49%, V5.42%, Nb0.15%, Mn0.3%, RE0.25%, Si0.45%, Al0.5%, Ni0.15%, and all the other are Fe and a small amount of impurity.Its hardness is 54HRC, and bending strength is 751Mpa.
Two, the heat treating method of high-carbon high-alloy steel
Embodiment 2
Height prepared by intercepting embodiment 1 is that the high-carbon high-alloy steel pipe of 50mm is heat-treated in chamber type electric resistance furnace, and concrete technology comprises modifier treatment, solution strengthening process, dispersion-strengthened process.
Modifier treatment: holding temperature is 930 DEG C, soaking time is 200min, and oil cooling is to room temperature, and cooling rate is 60 DEG C/S, and tempering temperature is 730 DEG C, and soaking time is 160min, and stove is chilled to room temperature, and Tempering and Quenching operation completes.Its hardness is 43HRC, and bending strength is 1340Mpa.
Solution strengthening process: holding temperature is 960 DEG C, soaking time is 130min, and oil cooling is to room temperature, and cooling rate 90 DEG C/S, solution strengthening heat treatment step completes.Its hardness is 65HRC, and bending strength is 980Mpa.
Dispersion-strengthened process: Tempering temperature is 350 DEG C, and soaking time is 80min, and air cooling is to room temperature; Double tempering temperature is 530 DEG C, soaking time 80min, and air cooling is to room temperature, and dispersion-strengthened treatment process completes.A tempered-hardness is 64HRC, and bending strength is 1390Mpa; Double tempering hardness is 68HRC, and bending strength is 1460Mpa.
Embodiment 3
Height prepared by intercepting embodiment 1 is that the rotary casting high-carbon high-alloy steel pipe of 75mm is heat-treated in chamber type electric resistance furnace, and concrete technology comprises modifier treatment, solution strengthening process, dispersion-strengthened process.
Modifier treatment: holding temperature is 950 DEG C, soaking time is 200min, and oil cooling is to room temperature, and cooling rate is 60 DEG C/S, and tempering temperature is 750 DEG C, and soaking time is 160min, and stove is chilled to room temperature, and Tempering and Quenching operation completes.Its hardness is 40HRC, and bending strength is 1450Mpa.
Solution strengthening process: holding temperature is 1000 DEG C, soaking time is 130min, and oil cooling is to room temperature, and cooling rate 90 DEG C/S, solution strengthening heat treatment step completes.Its hardness is 67HRC, and bending strength is 1040Mpa.
Dispersion-strengthened process: Tempering temperature is 370 DEG C, and soaking time is 80min, and air cooling is to room temperature; Double tempering temperature is 550 DEG C, soaking time 80min, and air cooling is to room temperature, and dispersion-strengthened treatment process completes.A tempered-hardness is 65HRC, and bending strength is 1420Mpa; Double tempering hardness is 69HRC, and bending strength is 1495Mpa.
Claims (1)
1. a rotary casting high-carbon high-alloy steel, its chemical composition and weight percent are: C 1.5-3.8%, W 2-10%, Cr 3-10%, Mo 2-8%, V 4-10%, Nb 0-3%, Mn 0.2-0.8%, RE 0.1-0.4%, Si≤1.0%, Al≤0.8%, Ni≤0.3%, surplus is Fe and the inevitable impurity of trace; The heat treating method of this high-carbon high-alloy steel comprises modifier treatment, solution strengthening process, dispersion-strengthened process successively; Described modifier treatment process is as follows: quenching temperature 920-960 DEG C, soaking time t
1=(1.5-2.0) δ+150, oil cooling to room temperature, cooling rate 50-80 DEG C/S, tempering temperature 720-760 DEG C, soaking time t
2=(1.0-1.5) δ+120, after stove is as cold as 500 DEG C, the cold or air cooling of stove, t
1, t
2be respectively Quenching Soaking Time, tempering insulation time, min, δ are thickness of workpiece, mm; Described solution strengthening treating processes is as follows: holding temperature 960-1020 DEG C, soaking time t
3=(1.5-2.0) δ+80, oil cooling to room temperature, cooling rate 80-100 DEG C/S, t
3for solution strengthening soaking time, min, δ are thickness of workpiece, mm; Described dispersion-strengthened treating processes is as follows: Tempering temperature 340-380 DEG C, soaking time t
4=(1.0-1.5) δ+50, air cooling, double tempering temperature is 520-560 DEG C, soaking time t
5=(1.0-1.5) δ+50, air cooling, t
4, t
5be respectively tempering insulation time, a double tempering soaking time, min, δ are thickness of workpiece, mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310145436.5A CN103215526B (en) | 2013-04-25 | 2013-04-25 | Centrifugally-cast high-carbon high-alloy steel and heat treatment method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310145436.5A CN103215526B (en) | 2013-04-25 | 2013-04-25 | Centrifugally-cast high-carbon high-alloy steel and heat treatment method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103215526A CN103215526A (en) | 2013-07-24 |
| CN103215526B true CN103215526B (en) | 2015-02-18 |
Family
ID=48813670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310145436.5A Active CN103215526B (en) | 2013-04-25 | 2013-04-25 | Centrifugally-cast high-carbon high-alloy steel and heat treatment method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103215526B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104498682A (en) * | 2014-12-15 | 2015-04-08 | 贵州安吉航空精密铸造有限责任公司 | Heat treatment method of casting in precision-investment casting |
| CN107779547A (en) * | 2016-08-26 | 2018-03-09 | 朱伟杰 | Rare earth 1#Technique for applying of the alloy in cast steel |
| CN106801199B (en) * | 2017-02-07 | 2018-07-24 | 和县隆盛精密机械有限公司 | A kind of mechanical arm high-strength alloy and preparation method thereof |
| CN116770181B (en) * | 2023-06-25 | 2024-01-02 | 张家口万邦锻造有限公司 | Low-alloy high-wear-resistance lining plate and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631565A (en) * | 2003-12-22 | 2005-06-29 | 河南科技大学 | Composite roller for high vanadium high speed steel and its production process |
| CN101037760A (en) * | 2007-04-03 | 2007-09-19 | 西安交通大学 | High-carbon high-high-vanadium high-speed steel composite roller and heat treatment method thereof |
| CN101240402A (en) * | 2008-02-04 | 2008-08-13 | 向勇 | Cast high-boron high-speed steel for composite ring roller and heat treatment method thereof |
-
2013
- 2013-04-25 CN CN201310145436.5A patent/CN103215526B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631565A (en) * | 2003-12-22 | 2005-06-29 | 河南科技大学 | Composite roller for high vanadium high speed steel and its production process |
| CN101037760A (en) * | 2007-04-03 | 2007-09-19 | 西安交通大学 | High-carbon high-high-vanadium high-speed steel composite roller and heat treatment method thereof |
| CN101240402A (en) * | 2008-02-04 | 2008-08-13 | 向勇 | Cast high-boron high-speed steel for composite ring roller and heat treatment method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 高碳高速钢轧辊中合金元素的作用及成分设计;叶江等;《现代铸铁》;20070225(第1期);第50-55页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103215526A (en) | 2013-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103624084B (en) | Resource-saving type high-boron high-speed steel composite roll and manufacturing method thereof | |
| CN100574910C (en) | Centrifugal casting half steel/steel/graphite steel composite roll collar and preparation method thereof | |
| CN104264043B (en) | A kind of centrifugal casting wear-resistant high speed steel composite roll and preparation method thereof | |
| CN103014516B (en) | Borated low-alloy high-speed steel roller and manufacturing method thereof | |
| CN102962423B (en) | Centrifugal high-carbon, high-boron and high-speed steel composite roller shell and fabrication method of combined roller of composite roller shell | |
| CN100552075C (en) | A kind of compound high speed steel roll and castmethod thereof | |
| CN104148399B (en) | For abrasion-resistant roller of mill stand and preparation method thereof in steel rolling | |
| CN102766824B (en) | Abrasion-resistant high-speed-steel roller ring and preparation method thereof | |
| CN100575528C (en) | Cobalt less multi element high speed tool steel and manufacture method thereof | |
| CN104388812B (en) | High-speed steel composite roller for rods/wires and preparation method of high-speed steel composite roller | |
| CN103526125B (en) | A kind of semisteel roll and manufacture method thereof | |
| CN105618715A (en) | Abrasion-resistance high-speed steel composite roller and preparation method thereof | |
| CN103526126A (en) | Tool steel roller for rolling medium-thickness plate and manufacturing method thereof | |
| CN104775065A (en) | High strength and toughness wear-resistant ductile iron rocking arm and production method thereof | |
| CN104438337B (en) | A kind of abrasion-resistant roller for cold rolling of strip steel and preparation method thereof | |
| CN104060157B (en) | A kind of hypereutectic high-chromium white cast iron and preparation method thereof | |
| CN104878296A (en) | High vanadium anti-wear alloy material for rolling mill guide roller and rolling mill guide roller heat treatment method | |
| CN110257695B (en) | Copper-containing CADI (copper-activated carbon dioxide) wear-resistant material and heat treatment process thereof | |
| CN105177447A (en) | Centrifugal cast Cr12MoV shape steel straightening roll and production technology thereof | |
| CN102560229A (en) | Low chrome multielement alloy cast ball and preparing method thereof | |
| CN103215526B (en) | Centrifugally-cast high-carbon high-alloy steel and heat treatment method thereof | |
| CN102383044A (en) | Multicomponent low alloy high speed steel used for preparing roller | |
| CN110964973A (en) | High-manganese CADI and heat treatment method thereof | |
| CN106544596A (en) | A kind of aluminium alloying high-boron high-speed steel composite roller and preparation method thereof | |
| CN104593663B (en) | A kind of wear-resistant white cast iron and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181214 Address after: 523000 Factory Building of Tiantou Village, Hengli Town, Dongguan City, Guangdong Province Patentee after: Dongguan City Yu Tian new material Co., Ltd Address before: 610500 Xindu Road, Xindu District, Chengdu, Sichuan Province, No. 8 Patentee before: Southwest Petroleum University |