CN103397273A - Carbide-free bainitic steel, toothed plate adopting steel and preparation method thereof - Google Patents
Carbide-free bainitic steel, toothed plate adopting steel and preparation method thereof Download PDFInfo
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- CN103397273A CN103397273A CN201310313260XA CN201310313260A CN103397273A CN 103397273 A CN103397273 A CN 103397273A CN 201310313260X A CN201310313260X A CN 201310313260XA CN 201310313260 A CN201310313260 A CN 201310313260A CN 103397273 A CN103397273 A CN 103397273A
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Abstract
The invention discloses carbide-free bainitic steel and a rod-toothed crusher toothed plate prepared from the carbide-free bainitic steel. The bainitic steel comprises the following chemical components in percentage by weight: 0.3 to 0.4 percent of C, 1.0 to 2.0 percent of Si, 1.5 to 2.5 percent of Mn, 0.8 to 1.4 percent of Cr, 0.1 to 0.6 percent of Mo, 0.8 to 1.6 percent of Ni, 0.004 to 0.008 percent of B, 0.2 to 0.5 percent of Ti, less than or equal to 0.015 percent of P, less than or equal to 0.015 percent of S, and the balance of Fe and accompanying impurities. The carbide-free bainitic steel is prepared into the rod-toothed crusher toothed plate through a specific processing technology; the toothed plate has good strong-toughness coordination, which reaches the working performance index of the rod-toothed crusher toothed plate; and the abrasion resistance of the rod-toothed crusher toothed plate is greatly improved, the service life of the rod-toothed crusher toothed plate is greatly prolonged, and the cost is reduced.
Description
Technical field
The present invention relates to a kind of non-carbide bainitic steel, adopt toothed plate of toothed roll crusher that this non-carbide bainitic steel is prepared from as material and the preparation method of this toothed plate of toothed roll crusher.
Background technology
The non-sheet tissue that Typical Bainite is comprised of bainite ferrite and carbide; Carbide-free Bainite is a kind of New Type Bainite tissue, and tissue is comprised of bainite ferrite (BF) and residual austenite (AR), is bainite transformation initial stage product, and in tissue, carbides-free exists; Compare with the Typical Bainite tissue, the residual austenite in tissue has replaced the carbide in the Typical Bainite, has improved greatly the impact property of material; That this material has is high-strength, high-ductility, wear-resistant, the characteristics such as can weld.
Toothed roll crusher has compact construction, flexible arrangement, and shared bulk is little, noise is low, simple in structure, easy to maintenance, productivity is high, the characteristics such as safe and reliable, the medium-hard material that is widely used in the industries such as metallurgy, coal, electric power, building materials, refractory materials is broken; Toothed roll crusher is that shearing force and the high squeeze of utilizing two wear resistant alloy discaling rolls relatively to rotate generation are carried out broken material, during broken material, material enters the crusher chamber of two gap of tooth roller, be subject to the two counterrotating squeeze of discaling roll and shear actions, under extruding, shearing action, material is broken into the granularity that needs.Tooth plate is the main wearing parts of toothed roll crusher, directly with material, contacts during work, is subject to squeeze and abrasive wear that material produces, and main failure mode has the distortion of crown, fracture and wearing and tearing, and in actual production, the consumption of tooth plate is very large.The manufactured materials of tooth plate mainly contains the alloy abrasion resistant steel of high mangaenese steel, medium manganese steel, martensitic stucture and the matrix material of rich chromium cast iron and carbon steel at present, and practical effect is not all very desirable.
Summary of the invention
The object of the invention is to overcome that the tooth plate of toothed roll crusher in prior art is yielding, the problem of fracture and wearing and tearing, a kind of non-carbide bainitic steel and the application in toothed plate of toothed roll crusher thereof are provided, that this non-carbide bainitic steel has is high-strength, high-ductility, wear-resistant, the characteristic such as can weld, the resistance to abrasion of toothed plate of toothed roll crusher and life-span are greatly enhanced.
Another object of the present invention is to provide a kind of preparation method of toothed plate of toothed roll crusher.
In order to realize the foregoing invention purpose, the technical solution used in the present invention is as follows:
A kind of non-carbide bainitic steel is provided, its chemical composition and weight proportion thereof are: C 0.3 ~ 0.4%, Si 1.0 ~ 2.0%, Mn 1.5 ~ 2.5%, Cr 0.8 ~ 1.4%, Mo 0.1 ~ 0.6%, Ni 0.8 ~ 1.6%, B 0.004 ~ 0.008%, Ti 0.2 ~ 0.5%, P≤0.015%, and S≤0.015%, surplus is Fe and the impurity of following.
The chemical composition of above-mentioned bainitic steel and weight proportion thereof are: C 0.3%, Si 1.0%, Mn 1.5%, Cr 0.8%, Mo 0.1%, Ni 0.8%, B 0.004%, Ti 0.2%, P≤0.015%, and S≤0.015%, surplus are Fe and the impurity of following.
The chemical composition of above-mentioned bainitic steel and weight proportion thereof are: C 0.35%, Si 1.5%, Mn 2.0%, Cr 1.2%, Mo 0.4%, Ni1.2%, B 0.006%, Ti 0.3%, P≤0.015%, and S≤0.015%, surplus are Fe and the impurity of following.
Another technical solution used in the present invention is as follows:
A kind of toothed plate of toothed roll crusher that adopts above-mentioned non-carbide bainitic steel to be prepared from as material, the acting as of each component in this tooth plate: carbon is alloying element important in low alloy steel, mainly hardness, wear resistance, the over-all properties (intensity, plasticity etc.) of steel are produced larger impact, increase along with carbon content, the hardness of material and strength increase, but plasticity and toughness reduce; Silicon can improve in certain limit the intensity of steel, increases the toughness of steel, improves the resistance to tempering of steel; Manganese, molybdenum and boron all can improve the hardening capacity of steel; Chromium can improve hardening capacity and the temper resistance of steel, and nickel can increase substantially the toughness of steel, the tissue of titanium energy refinement steel.
The preparation method of above-mentioned toothed plate of toothed roll crusher comprises the following steps:
(1) lost foam casting process: adopt eps foam to prepare the toothed plate of toothed roll crusher model, be coated with the rear vanning of refractory paint and oven dry, then burn casing forming under negative pressure state;
(2) adopt again medium-frequency induction furnace to prepare non-carbide bainitic steel, detailed process is: scrap melting is become molten steel, stokehold is carried out chemical composition and is detected, adjust molten steel component to its chemical composition and weight proportion and be by adding alloy and pure metal again: C 0.3 ~ 0.4%, Si 1.0 ~ 2.0%, Mn 1.5 ~ 2.5%, Cr 0.8 ~ 1.4%, Mo 0.1 ~ 0.6%, Ni 0.8 ~ 1.6%, B 0.004 ~ 0.008%, Ti 0.2 ~ 0.5%, P≤0.015%, S≤0.015% and surplus are Fe and the impurity followed, carry out again deoxidation treatment, come out of the stove, make; Again with the above-mentioned non-carbide bainitic steel vibrating casting that makes in the mould of step (1) through burning casing forming and making, obtain the toothed plate of toothed roll crusher foundry goods; Wherein, tapping temperature is 1650 ~ 1690 ℃, and teeming temperature is 1550 ~ 1640 ℃;
(3) thermal treatment process: the foundry goods that step (2) is made is heated to 950 ℃ and carries out austenitizing, then, through air cooling or air-cooled processing, carries out finally low-temperaturetempering and process under 250 ℃, obtains toothed plate of toothed roll crusher.
In sum, non-carbide bainitic steel of the present invention is by arranging specific formula and content, make it have high-strength, high-ductility, the wear-resistant and characteristic that can weld, and utilize this non-carbide bainitic steel to prepare toothed plate of toothed roll crusher through specific complete processing, this tooth plate has combination of strength and toughness preferably, make it reach the task performance index, and greatly improved resistance to abrasion and the life-span of this toothed plate of toothed roll crusher, reduce costs.
Description of drawings
Fig. 1 is the TEM image of the tissue of toothed plate of toothed roll crusher.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail, but they are not to further restriction of the present invention.
Embodiment 1
Carbide bainitic steel chemical composition and weight percent thereof are: C 0.3%, Si 1.0%, Mn 1.5%, Cr 0.8%, Mo 0.1%, Ni 0.8%, B 0.004%, Ti 0.2%, P≤0.015%, and S≤0.015%, surplus are Fe and the impurity of following.
Adopt above-mentioned carbide bainitic steel (ZG35Si2Mn2Ni2CrMoBTi) as material, by lost foam casting process and thermal treatment process, prepare toothed plate of toothed roll crusher; Detailed process is: adopt the moulding of evaporative pattern cast, adopt eps foam to prepare the toothed plate of toothed roll crusher model, be coated with the rear vanning of refractory paint and oven dry, then burn casing forming under negative pressure state; Adopt again 0.75 ton of medium-frequency induction furnace to prepare non-carbide bainitic steel, detailed process is: scrap melting is become molten steel, stokehold is carried out chemical composition and is detected, adjusting molten steel component to its chemical composition and weight proportion by interpolation alloy and pure metal again is: C 0.3%, Si 1.0%, Mn 1.5%, Cr 0.8%, Mo 0.1%, Ni 0.8%, B 0.004%, Ti 0.2%, P≤0.015%, and S≤0.015%, surplus is Fe and the impurity of following, carry out again deoxidation treatment, come out of the stove, make non-carbide bainitic steel; Again with the above-mentioned non-carbide bainitic steel vibrating casting that makes in burning the mould that casing forming makes, obtain the toothed plate of toothed roll crusher foundry goods; Wherein, tapping temperature is 1650 ~ 1690 ℃, and teeming temperature is 1550 ~ 1640 ℃; Again the above-mentioned foundry goods that makes is heated to 950 ℃ and carries out austenitizing, then, through air cooling or air-cooled processing, carry out finally low-temperaturetempering and process under 250 ℃, obtain toothed plate of toothed roll crusher.
As shown in Figure 1, the tissue of the tooth plate after above-mentioned temper is comprised of bainite ferrite and residual austenite, belong to the carbide-free Bainite tissue, it is the initial stage product of Typical Bainite structural transformation, this tissue has kept the process characteristic of Typical Bainite tissue, has than Typical Bainite and organizes better comprehensive mechanical performance.
Adopt the powerful tooth plate of toothed roll crusher, the broken tooth plate of one-level and the two-stage crushing tooth plate of non-carbide bainitic steel preparation, be applied in the fragmentation of the materials such as ore, coal and coal gangue of the industries such as metallurgy, coal, electric power; Compare with tooth plate of the prior art, the excellent combination property of this tooth plate, resistance to abrasion is good, and the tooth plate life-span is improved 1 ~ 2 times.
Embodiment 2
Carbide bainitic steel chemical composition and weight percent thereof are: C 0.4%, Si 2.0%, Mn 2.5%, Cr 1.4%, Mo 0.6%, Ni 1.6%, B 0.008%, Ti 0.5%, P≤0.015%, and S≤0.015%, surplus are Fe and the impurity of following.
Adopt above-mentioned carbide bainitic steel as material, by lost foam casting process and thermal treatment process, prepare toothed plate of toothed roll crusher; Detailed process is:
(1) lost foam casting process: adopt eps foam to prepare the toothed plate of toothed roll crusher model, be coated with the rear vanning of refractory paint and oven dry, then burn casing forming under negative pressure state;
(2) adopt again medium-frequency induction furnace to prepare non-carbide bainitic steel, detailed process is: scrap melting is become molten steel, stokehold is carried out chemical composition and is detected, adjusting molten steel component to its chemical composition and weight proportion by interpolation alloy and pure metal again is: C 0.4%, Si 2.0%, Mn 2.5%, Cr 1.4%, Mo 0.6%, Ni 1.6%, B 0.008%, Ti 0.5%, P≤0.015%, and S≤0.015%, surplus is Fe and the impurity of following, then carries out deoxidation treatment, come out of the stove, make; Again with the above-mentioned non-carbide bainitic steel vibrating casting that makes in the mould of step (1) through burning casing forming and making, obtain the toothed plate of toothed roll crusher foundry goods; Wherein, tapping temperature is 1650 ~ 1690 ℃, and teeming temperature is 1550 ~ 1640 ℃;
(3) thermal treatment process: the above-mentioned foundry goods that makes is heated to 950 ℃ carries out austenitizing, then, through air cooling or air-cooled processing, carry out finally low-temperaturetempering and process under 250 ℃, obtain toothed plate of toothed roll crusher.
Above-mentioned toothed plate of toothed roll crusher adopts the mechanical property after different heat treatment technique as shown in table 1:
Table 1
| The type of cooling | Tensile strength sigma b/MPa | Hardness/HRC | Impact toughness A ku/J |
| Air cooling | 1425~1553 | 42~51 | 30~42 |
| Air-cooled | 1624~1708 | 47~56 | 26~35 |
Compare with tooth plate of the prior art, the excellent combination property of this tooth plate, resistance to abrasion is good, and the tooth plate life-span is improved 1 ~ 2 times.
Embodiment 3
Carbide bainitic steel chemical composition and weight percent thereof are: C 0.35%, Si 1.5%, Mn 2.0%, Cr 1.2%, Mo 0.4%, Ni1.2%, B 0.006%, Ti 0.3%, P≤0.015%, and S≤0.015%, surplus are Fe and the impurity of following.
Adopt above-mentioned carbide bainitic steel (ZG35Si2Mn2Ni2CrMoBTi) as material, by lost foam casting process and thermal treatment process, prepare toothed plate of toothed roll crusher; Detailed process is: adopt the moulding of evaporative pattern cast, adopt eps foam to prepare the toothed plate of toothed roll crusher model, be coated with the rear vanning of refractory paint and oven dry, then burn casing forming under negative pressure state; Adopt again 0.75 ton of medium-frequency induction furnace to prepare non-carbide bainitic steel, detailed process is: scrap melting is become molten steel, stokehold is carried out chemical composition and is detected, adjusting molten steel component to its chemical composition and weight proportion by interpolation alloy and pure metal again is: C 0.35%, Si 1.5%, Mn 2.0%, Cr 1.2%, Mo 0.4%, Ni1.2%, B 0.006%, Ti 0.3%, P≤0.015%, and S≤0.015%, surplus is Fe and the impurity of following, carry out again deoxidation treatment, come out of the stove, make non-carbide bainitic steel; Again with the above-mentioned non-carbide bainitic steel vibrating casting that makes in burning the mould that casing forming makes, obtain the toothed plate of toothed roll crusher foundry goods; Wherein, tapping temperature is 1650 ~ 1690 ℃, and teeming temperature is 1550 ~ 1640 ℃; Again the above-mentioned foundry goods that makes is heated to 950 ℃ and carries out austenitizing, then, through air cooling or air-cooled processing, carry out finally low-temperaturetempering and process under 250 ℃, obtain toothed plate of toothed roll crusher.
Compare with tooth plate of the prior art, the excellent combination property of this tooth plate, resistance to abrasion is good, and the tooth plate life-span is improved 1 ~ 2 times.
, although in conjunction with specific embodiments the specific embodiment of the present invention is described in detail, be not the restriction to this patent protection domain.In claims limited range, various modifications that those skilled in the art can make without creative work or adjust the protection that still is subjected to this patent.
Claims (5)
1. non-carbide bainitic steel, it is characterized in that: the chemical composition of this bainitic steel and weight proportion thereof are: C 0.3 ~ 0.4%, Si 1.0 ~ 2.0%, Mn 1.5 ~ 2.5%, Cr 0.8 ~ 1.4%, Mo 0.1 ~ 0.6%, Ni 0.8 ~ 1.6%, B 0.004 ~ 0.008%, Ti 0.2 ~ 0.5%, P≤0.015%, and S≤0.015%, surplus is Fe and the impurity of following.
2. non-carbide bainitic steel according to claim 1, it is characterized in that: the chemical composition of this bainitic steel and weight proportion thereof are: C 0.3%, Si 1.0%, Mn 1.5%, Cr 0.8%, Mo 0.1%, Ni 0.8%, B 0.004%, Ti 0.2%, P≤0.015%, and S≤0.015%, surplus is Fe and the impurity of following.
3. non-carbide bainitic steel according to claim 1, it is characterized in that: the chemical composition of this bainitic steel and weight proportion thereof are: C 0.35%, Si 1.5%, Mn 2.0%, Cr 1.2%, Mo 0.4%, Ni1.2%, B 0.006%, Ti 0.3%, P≤0.015%, and S≤0.015%, surplus is Fe and the impurity of following.
4. toothed plate of toothed roll crusher is characterized in that: this tooth plate adopts non-carbide bainitic steel to be prepared from as material.
5. the preparation method of a toothed plate of toothed roll crusher, is characterized in that, comprises the following steps:
(1) lost foam casting process: adopt eps foam to prepare the toothed plate of toothed roll crusher model, be coated with the rear vanning of refractory paint and oven dry, then burn casing forming under negative pressure state;
(2) adopt again medium-frequency induction furnace to prepare non-carbide bainitic steel, detailed process is: scrap melting is become molten steel, stokehold is carried out chemical composition and is detected, adjust molten steel component to its chemical composition and weight proportion and be by adding alloy and pure metal again: C 0.3 ~ 0.4%, Si 1.0 ~ 2.0%, Mn 1.5 ~ 2.5%, Cr 0.8 ~ 1.4%, Mo 0.1 ~ 0.6%, Ni 0.8 ~ 1.6%, B 0.004 ~ 0.008%, Ti 0.2 ~ 0.5%, P≤0.015%, S≤0.015% and surplus are Fe and the impurity followed, carry out again deoxidation treatment, come out of the stove, make; Again with the above-mentioned non-carbide bainitic steel vibrating casting that makes in the mould of step (1) through burning casing forming and making, obtain the toothed plate of toothed roll crusher foundry goods; Wherein, tapping temperature is 1650 ~ 1690 ℃, and teeming temperature is 1550 ~ 1640 ℃;
(3) thermal treatment process: the foundry goods that step (2) is made is heated to 950 ℃ and carries out austenitizing, then, through air cooling or air-cooled processing, carries out finally low-temperaturetempering and process under 250 ℃, obtains toothed plate of toothed roll crusher.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104593664A (en) * | 2014-11-13 | 2015-05-06 | 东北大学 | Hot-rolled nanometer bainite steel, production method of hot-rolled nanometer bainite steel and manufacturing method of automotive frame |
| CN115161557A (en) * | 2022-07-07 | 2022-10-11 | 唐山天和环保科技股份有限公司 | Coal mine crusher tooth cap and preparation method thereof |
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| CN101934242A (en) * | 2010-09-26 | 2011-01-05 | 郑州海特机械有限公司 | Combined hammer head and manufacturing process thereof |
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2013
- 2013-07-24 CN CN201310313260XA patent/CN103397273A/en active Pending
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| JPH0797656A (en) * | 1993-09-30 | 1995-04-11 | Kobe Steel Ltd | Cold forging steel |
| CN1477226A (en) * | 2003-08-01 | 2004-02-25 | 清华大学 | Medium-low carbon manganese system self-hardening bainite steel |
| CN101934242A (en) * | 2010-09-26 | 2011-01-05 | 郑州海特机械有限公司 | Combined hammer head and manufacturing process thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104593664A (en) * | 2014-11-13 | 2015-05-06 | 东北大学 | Hot-rolled nanometer bainite steel, production method of hot-rolled nanometer bainite steel and manufacturing method of automotive frame |
| CN115161557A (en) * | 2022-07-07 | 2022-10-11 | 唐山天和环保科技股份有限公司 | Coal mine crusher tooth cap and preparation method thereof |
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Application publication date: 20131120 |