CN101603158B - Large-diameter centrifugal casting furnace roller - Google Patents
Large-diameter centrifugal casting furnace roller Download PDFInfo
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- CN101603158B CN101603158B CN2009103049729A CN200910304972A CN101603158B CN 101603158 B CN101603158 B CN 101603158B CN 2009103049729 A CN2009103049729 A CN 2009103049729A CN 200910304972 A CN200910304972 A CN 200910304972A CN 101603158 B CN101603158 B CN 101603158B
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- furnace roller
- roller
- heat treatment
- centrifugal casting
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- 238000009750 centrifugal casting Methods 0.000 title claims abstract description 8
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 6
- 229910052706 scandium Inorganic materials 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 20
- 239000010959 steel Substances 0.000 abstract description 20
- 239000000463 material Substances 0.000 abstract description 13
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 3
- 238000005097 cold rolling Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 229910020012 Nb—Ti Inorganic materials 0.000 abstract 1
- 230000003064 anti-oxidating effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000010943 off-gassing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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Abstract
The invention discloses a large-diameter centrifugal casting furnace roller for cold-rolling heat treatment of automobile plates in the metallurgical industry. The roller comprises the elements in percentage by weight: 0.15 to 0.35 percent of C, 0.50 to 2.50 percent of Si, 0 to 2.00 percent of Mn, 8.00 to 10.00 percent of Ni, 17.00 to 19.00 percent of Cr, 0 to 0.04 percent of P, 0 to 0.03 percentof S, 0.80 to 1.20 percent of Nb, 0.20 to 0.50 percent of Ti, 0.50 to 0.80 percent of Sc, and the balance of Fe. On the basis of adopting a GX25CrNiSi18-9 material, an appropriate amount of Nb-Ti microalloy elements and Sc rare earth elements is added to the material so as to thin the grain size of steel, improve As-cast structure, increase high-temperature creep strength and anti-oxidation capacity of the roller and meet the requirements of heat treatment furnaces. The large-diameter furnace roller centrifugally cast and manufacture with the material is widely applied to various heat treatment furnaces.
Description
Technical field
The present invention relates to a kind of centrifugal casting furnace roller, relate in particular to the large-diameter centrifugal casting furnace roller of cold rolling thermal treatment automobile sheet material of a kind of metallurgy industry etc.
Background technology
Along with rapid development of automobile industry, the steel band that automobile is used requires more and more higher, must heat-treat before use, realizes continuous annealing in order to make steel band, to improve heat treated work efficiency, furnace roller is installed in heat treatment furnace for this reason, promotes steel band and advances.Because heat treated temperature is carried out in 600-1200 ℃ scope and under the atmosphere of weak oxide, so furnace roller must keep the ability of transmission high-temperature steel belt in the long-time continuous operation.Under exacting terms like this, furnace roller can produce following defective: 1. the wearing and tearing on furnace roller surface, 2. oxide compound or iron dirt type particulate matter can have a strong impact on the surface quality of annealing steel band in the furnace roller surface adhesion when these particulate matter acquire a certain degree.China's furnace roller production is through the development of decades, obtained than good result, along with science and technology is constantly brought forth new ideas, requirement to furnace roller is also more and more higher, requirement develops to bigbore direction, increase substantially heat treated work efficiency, but do not catch up with the paces that Iron And Steel Industry technical progress, composition optimizes are adjusted fully in the breed structure adjustment, high-end furnace roller throughput is obviously not enough.Big shaped steel enterprise such as Baosteel, Anshan iron and steel plant wide plate hoop mill every year all will be from external import furnace roller, domestic main employing GX25CrNiSi18-9 material is made furnace roller at present, to improve the wear resistance of furnace roller, it is with the obvious advantage that this material is made small-bore furnace roller, when still making the heavy caliber furnace roller, easily produces segregation phenomena, its antioxidant property is poor, the furnace roller intensity that casting is come out does not reach requirement, and easy deformation produces oval, and it is even to produce inhomogeneity of wall thickness after the whole precision work.Can produce flexural deformation in furnace high-temperature, high tensile running, influence steel band operation and steel strip surface quality, have only about 10 months work-ing life.
Summary of the invention
The object of the invention is to adopt on the GX25CrNiSi18-9 material foundation, add an amount of Nb, Ti microalloy element and rare earth element scandium (Sc) and come the novel heavy caliber furnace roller of rotary casting, the grain fineness number of refinement steel, improve as-cast structure, improve furnace roller high temperature creep strength and resistance of oxidation, satisfy the requirement of heat treatment furnace.
Technical scheme of the present invention is achieved in that
A kind of large-diameter centrifugal casting furnace roller, the weight percent of each element is: C is that 0.15-0.35%, Si are that 0.50-2.50%, Mn are that 0-2.00%, Ni are that 8.00-10.00%, Cr are that 17.00-19.00%, P are that 0-0.04%, S are that 0-0.03%, Nb are that 0.80-1.20%, Ti are that 0.20-0.50%, Sc are 0.50-0.80%, and surplus is Fe.
The present invention compared with prior art has following advantage:
1. furnace roller material adopts high Cr, high Ni, high Si content, increased the scheme of Nb, Ti and rare earth element scandium (Sc), through repetition test and analysis, and handle through laboratory simulation data, find out the optimal components proportioning, improve column crystal, equiax crystal distribution proportion, thereby improve material at high temperature creep strength and oxidation-resistance.The heavy caliber furnace roller intensity height that rotary casting is come out, indeformable, tensile strength reaches 490MPa under the room temperature, and yield strength reaches 235MPa.
2. wall thickness is even after the whole precision work.
3. coefficient of thermal expansion unanimity under the running of furnace high-temperature, high tensile, furnace roller can not produce flexural deformation.
Embodiment:
A kind of large-diameter centrifugal casting furnace roller, the weight percent of each element is: C is that 0.15-0.35%, Si are that 0.50-2.50%, Mn are that 0-2.00%, Ni are that 8.00-10.00%, Cr are that 17.00-19.00%, P are that 0-0.04%, S are that 0-0.03%, Nb are that 0.80-1.20%, Ti are that 0.20-0.50%, Sc are 0.50-0.80%, and surplus is Fe.
The reasons are as follows of elemental composition limited range among the present invention:
C: be the forming element of carbide, and in antifriction cast iron, the composition of carbide, form, distribution and quantity are the crux factors of its performance of decision.In the hypoeutectic scope, increase with carbon content, produce the corresponding increase of quantity of carbide, hardness improves, but fragility increases toughness decline.Carbon content is crossed when low carbide decreases in the material, and is unfavorable to the wear resistance of cast iron.Take into account and consider that the carbon amount is controlled at 0.15-0.35%;
Si: can improve the castability of cast iron, and help the molten steel deoxidization degasification, can also make the carbide agglomerateization.But the too high fragility that can increase material of silicon content.Evidence, Si and Ti add simultaneously than the Ti of independent adding same amount or Si can obtain better wear resistance, thereby its content is controlled at 0.50-2.50%;
Mn: mainly play the deoxidation outgassing, too high levels can produce the abundant residues austenite, and is unfavorable to material wear ability, should be controlled at below 2.00%.
Ni: be a kind of non-carbide forming element, its solid solution can improve the intensity and the thermal fatigue resistance of matrix in matrix, is favourable to freedom from cracking and the peel-ability that improves furnace roller.But Ni is an austenite stabilizer element, and add-on is too much, and residual austenite is many in the quenching structure, reduces the furnace roller wear resistance, takes all factors into consideration Ni content is controlled at 8.00-10.00%;
Cr: mainly be present in carbide and the matrix, its too high levels, the formation of the carbide that precipitation was separated out when unnecessary Cr participated in tempering, this Cr of containing carbide is separated out when lesser temps easily, reduced the thermostability of steel, thereby its content is controlled at 17.00-19.00%;
Nb: the grain fineness number of refinement steel, the comprehensive mechanical property of raising furnace roller helps suppressing crack initiation and expansion, and in addition, it can be consolidated carbon and form carbide, improves the wear resistance of furnace roller.But Nb improves the quenching temperature of steel, reduce the temperature that the secondary hardness peak value occurs, so Nb content is controlled at 0.80-1.20%.
Ti: the grain fineness number of strong refinement steel, further improve intensity, toughness and the wear resistance of furnace roller.But reduce the red hardness of furnace roller, take all factors into consideration Ti content is controlled at 0.20-0.50%.
Sc: on the one hand in steel-making, play desulfurization, degas, the cleaning molten steel effect; The crystal grain of refinement steel on the other hand, improve as-cast structure (dwindling columnar zone), but its content was above 0.80% o'clock, molten steel will generate thick precipitated phase and the oxide compound of Sc, toughness to furnace roller will produce negative effect in this case, take all factors into consideration Sc content is controlled at 0.50-0.80%.
The content control of S, P is lower, to reduce the fragility of furnace roller, helps delaying the expansion of crackle.
The diameter that adopts this material use rotary casting to make is that the technical feature parameter of 1600mm furnace roller is as follows:
| Sequence number | Project | Unit | Performance index |
| ?1 | Maximum outside diameter | mm | ?1600 |
| ?2 | Maximum length | mm | |
| ?3 | The transient equilibrium index | g | ?＜200 |
| ?4 | The roll body surface roughness | Ra | ?0.8 |
| ?5 | Tensile strength R m | N/mm 2 | ?≥460 |
| ?6 | Yield strength R P0.2 | N/mm 2 | ?≥240 |
| ?7 | Elongation after fracture A | ％ | ≥15 |
| ?8 | 900 ℃ of creep-rupture strengths, 1000h | MPa | ?9 |
Claims (1)
1. large-diameter centrifugal casting furnace roller, the weight percent of each element is: C is that 0.15-0.35%, Si are that 0.50-2.50%, Mn are that 0-2.00%, Ni are that 8.00-10.00%, Cr are that 17.00-19.00%, P are that 0-0.04%, S are that 0-0.03%, Nb are that 0.80-1.20%, Ti are that 0.20-0.50%, Sc are 0.50-0.80%, and surplus is Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103049729A CN101603158B (en) | 2009-07-30 | 2009-07-30 | Large-diameter centrifugal casting furnace roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103049729A CN101603158B (en) | 2009-07-30 | 2009-07-30 | Large-diameter centrifugal casting furnace roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101603158A CN101603158A (en) | 2009-12-16 |
| CN101603158B true CN101603158B (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103049729A Active CN101603158B (en) | 2009-07-30 | 2009-07-30 | Large-diameter centrifugal casting furnace roller |
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| Country | Link |
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| CN (1) | CN101603158B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019294B (en) * | 2010-12-23 | 2012-07-18 | 山东理工大学 | Manufacturing method of large-sized high-ductility wear-resisting alloy roller |
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- 2009-07-30 CN CN2009103049729A patent/CN101603158B/en active Active
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| Publication number | Publication date |
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| CN101603158A (en) | 2009-12-16 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Kusun Special Steel Product Co., Ltd. Assignor: Sun Libin Contract record no.: 2011320001060 Denomination of invention: Large-diameter centrifugal casting furnace roller Granted publication date: 20101208 License type: Exclusive License Open date: 20091216 Record date: 20110722 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20170524 Address after: 214500, No. 68, prosperous road, Xinqiao Industrial Park, Jiangsu, Jingjiang Patentee after: Jiangsu Kusun Special Steel Product Co., Ltd. Address before: 214537, No. 68, prosperous road, Xinqiao Industrial Park, Jiangsu, Jingjiang Patentee before: Sun Libin |
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| TR01 | Transfer of patent right |
Effective date of registration: 20180413 Address after: 214500 Jingjiang Xinqiao Industrial Park, Jiangsu Province Patentee after: Jiangsu Xinlong Machinery Co., Ltd. Address before: 214500, No. 68, prosperous road, Xinqiao Industrial Park, Jiangsu, Jingjiang Patentee before: Jiangsu Kusun Special Steel Product Co., Ltd. |
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| TR01 | Transfer of patent right |