CN102634738B - Supporting roller with roughness keeping capability and manufacturing method thereof - Google Patents
Supporting roller with roughness keeping capability and manufacturing method thereof Download PDFInfo
- Publication number
- CN102634738B CN102634738B CN201210086972.8A CN201210086972A CN102634738B CN 102634738 B CN102634738 B CN 102634738B CN 201210086972 A CN201210086972 A CN 201210086972A CN 102634738 B CN102634738 B CN 102634738B
- Authority
- CN
- China
- Prior art keywords
- heat treatment
- roughness
- roll
- support roll
- hours
- 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
- 238000004519 manufacturing process Methods 0.000 title description 16
- 239000000463 material Substances 0.000 description 24
- 238000010438 heat treatment Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 14
- 238000005096 rolling process Methods 0.000 description 12
- 229910052758 niobium Inorganic materials 0.000 description 9
- 229910052804 chromium Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000005242 forging Methods 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000005496 tempering Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005275 alloying Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000003746 surface roughness Effects 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention discloses a supporting roller with a roughness keeping capability, comprising the following chemical components in mass percentage: 0.40-0.70% of C, 0.40-0.80% of Si, 0.50-0.80% of Mn, 4.5-5.5% of Cr, 0.40-1.00% of Mo, 0.30-0.50% of V, 0.40-0.60% of Ni. The supporting roller further comprises one or two of 0.05-0.30% of Nb and 0.05-0.30% of Ti, and residual amounts of Fe and unavoidable impurities. The invention further discloses a manufacturing method of the supporting roller; and the roughness keeping capability of the manufactured supporting roller is greatly improved.
Description
Technical field
The present invention relates to metallurgical roller and manufacture field, particularly a kind of support roll for strip cold mill and manufacture method thereof.
Background technology
Large strip rolling mill is the key processing equipment of modernization smelter, and support roll is the key core parts in milling train, is used for supporting working roll or intermediate roll, strengthens its rigidity.The use properties of support roll directly decides milling train and stablizes, produces line direct motion, produces consumption and quality product.
At present, the high-grade support roll of Ge great steel mill cold rolling product line mainly adopts 5%Cr forged steel series, and C content is between 0.4 ~ 0.6wt.%, and Cr content, at 2.0 ~ 5.0wt.%, contains the alloying elements such as a small amount of Mo, V in addition.5%Cr support roll can meet the need of production of common sheet material; but when mating high abrasion working roll (or intermediate roll) and producing the great surface quality such as automobile exterior panel, home appliance panel sheet material; expose the problem of roughness rapid decay; to cause producing skidding between support roll and working roll (or intermediate roll) lower than 0.1 μm of (for certain unit on-the-spot) time when roughness Ra value decays to, be changed support roll in advance by forced-stopping machine.For this problem, without associated solutions in existing patent, document, the scheme that scene is taked is the roll change rolling milimeter number in reconditioning process, roll surface roughness Ra value being risen to more than 1.0 μm and control support roll in such cases, thus avoids the generation of skidding.But this scheme does not fundamentally solve the problem of operation of rolling central roll surface roughness rapid decay, and control roll change rolling milimeter number will reduce production efficiency when producing high value-added product, thus improve production cost.
Summary of the invention
The object of this invention is to provide a kind of support roll and the manufacture method thereof with roughness retaining capability, by adding the carbides such as Nb, Ti, form isometric particle shape carbide, come off during rolling wearing and tearing at support roll roll surface formation friction cut, thus enable the roughness levels that roll surface keeps certain.The support roll roughness retaining capability manufactured in this way is better than the support roll of prior art.
For achieving the above object, the technical solution used in the present invention is:
For strip cold mill, a support roll with roughness retaining capability, its chemical composition by percent mass proportioning is: C:0.40 ~ 0.70%; Si:0.40 ~ 0.80%; Mn:0.50 ~ 0.80%; Cr:4.5 ~ 5.5%; Mo:0.40 ~ 1.00%; V:0.30 ~ 0.50%; Ni:0.40 ~ 0.60%, also containing Nb:0.05 ~ 0.30%; One or both of Ti:0.05 ~ 0.30%, all the other are Fe and inevitable impurity.
Wherein, the mass percent of Nb and Ti preferably meets following formula relation:
0.10≤Nb+Ti≤0.30 (1)
Below to the restriction reason of interalloy constituent content of the present invention and be described the preference relation formula of the content mass percent of Nb and Ti.
About C:0.40 ~ 0.70%
The effect of C in Material Used in Supporting Roll comprises in two, forms martensite or bainite matrix on the one hand, provides the fundamental property of roll; On the other hand forms carbide second phase with the alloying element such as Cr, Mo, V, improve wear resisting property, therefore the content of C should not be too low, but too high, can form the matrix of high-carbon content, affect plasticity and toughness, consider and control 0.40 ~ 0.70%.
About Cr:4.5 ~ 5.5%
In Material Used in Supporting Roll, Cr element tool plays a very important role, and part incorporates the effect that matrix plays solution strengthening on the one hand, improves through hardening performance and the anti-tempered performance of material; Form M7C3 type carbide on the other hand, effectively improve the wear resisting property of material, consider and control 4.5 ~ 5.5%.
About Mo:0.40 ~ 1.00%
The effect of Mo in Material Used in Supporting Roll and Cr similar, incorporate the effect that matrix plays solution strengthening on the one hand, improve the anti-tempered performance of material, form M2C type carbide on the other hand, the wear resisting property of effective raising material, but due to Mo element costly, and addition too much can improve the manufacture difficulty of material, considers and controls 0.40 ~ 1.00%.
About V:0.30 ~ 0.50%
The effect of V in Material Used in Supporting Roll mainly forms MC type carbide, and crystal grain thinning also effectively improves the wear resisting property of material, equally due to V element costly, and addition too much can improve the manufacture difficulty of material, considers and controls 0.30 ~ 0.50%.
About Si, Mn, Ni
The Main Function of above-mentioned 3 kinds of alloying elements in Material Used in Supporting Roll is strengthening matrix and the hardening capacity improving material, and addition crosses the plasticity and toughness that can affect material at most, considers and controls at Si:0.40 ~ 0.80%; Mn:0.50 ~ 0.80%; Ni:0.40 ~ 0.60%.
About the preference relation formula of Nb and Ti content mass percent
Nb and Ti is carbide, be added in Material Used in Supporting Roll and form that hardness is very high, the MC type carbide of cubic morphology, if addition is very few, unusual effect is not had to the roughness retaining capability improving material, if addition is too much, then easily assemble and form thick massive carbide, after coming off in a large number, worsen support roll surface, and unfavorable to the over-all properties of support roll.Consider and control in 0.10≤Nb+Ti≤0.30.
In addition, the present invention also provides a kind of manufacture method of support roll, and the support roll of above-mentioned per distribution ratio manufactures according to following technical process: smelting → forging → heat treatment after forging → roughing → UT (Ultrasonic Testing) → conditioning heat treatment → semi-finishing → finished heat treatment → precision work → finished product.
Wherein smelt the purity adopting the two vacuum technology of the outer vacuum refinement+vacuum argon blowing ingot casting of electric furnace+stove to ensure molten steel, forging adopts wide anvil brute force pressure forging process, through pre-pulling+pier thick+pull out three fire again to forge and form, pier slightly than and pulling than all about 2 ~ 3, roller stock entire length obtains abundant compacting, smash thick carbide, crystal grain thinning.Heat treatment after forging adopts 900 ~ 1000 DEG C of normalizing+carbide annealing process, to obtain compact grained globular pearlite tissue.Conditioning heat treatment adopts table-type turning stove heating+980 ~ 1020 DEG C of oil quenchings+650 ~ 700 DEG C of high-temperature tempering process, to obtain compact grained tempered sorbite tissue.
Special in finished heat treatment, comprise the heating of differential temperature stove, fog quenching and high tempering, described Final Heat Treatment Process parameter is: differential temperature stove Heating temperature is 1020 ~ 1080 DEG C, soaking time is 3 ~ 6 hours, spray cooling 5 ~ 30 hours, described high tempering temperature is 480 ~ 520 DEG C, soaking time is 10 ~ 20 hours.
The existence of Nb, Ti carbide improves the grain coarsening temperature of roll material, and finished heat treatment can adopt relatively high austenitic temperature, and obtains a large amount of carbide precipitates by high tempering.
The present invention with the addition of the carbides such as Nb, Ti on 5%Cr series Material Used in Supporting Roll basis, and controls total weight range of two kinds of alloying elements, and in conjunction with the heat treating method optimized, the support roll of manufacture obtains following technical progress:
(1) Nb and Ti is carbide, and preferential formation MC silicon carbide thing in steel, form mostly is isometric particle shape, and size is at 1 ~ 2 μm, and distribute disperse.This type of carbide fusing point is high, all can not melt in follow-up heat treatment process after liquid phase is separated out, its hardness is also very high simultaneously, easily comes off and forms friction cut at support roll roll surface, thus enable the roughness levels that roll surface keeps certain when rolling is worn and torn;
(2) because the existence of Nb, Ti carbide improves the grain coarsening temperature of roll material, finished heat treatment adopts higher austenitic temperature, and obtains a large amount of carbide precipitates by high tempering, ensure that the wear resisting property of support roll.
The support roll adopting material of the present invention and manufacture method to produce, effectively can improve roughness retaining capability, reaches normal roll change rolling milimeter number, enhance productivity, thus reduce production cost when producing high value added product.
Accompanying drawing explanation
Fig. 1 indicates the come off schematic diagram of NbC or TiC carbide particle in the operation of rolling.
Fig. 2 indicates NbC or TiC carbide particle and comes off to the scratching schematic diagram of roll surface.
Embodiment
Below in conjunction with embodiment, the present invention is described in further details.
The manufacturing approach craft step of each embodiment is substantially the same manner as Example 1, and difference is in table 1.
Table 1
Because NbC or TiC carbide particle fusing point is high, all can not melt in follow-up heat treatment process after liquid phase is separated out, its hardness is also very high simultaneously, easily come off when rolling is worn and torn, as depicted in figs. 1 and 2, and form friction cut at support roll roll surface, thus enable the roughness levels that roll surface keeps certain.
φ 1000mm × 1420mm support roll in kind has been made according to the material of the present embodiment and manufacturing process, roll surface average hardness value is 68HSD, dicyclo rolling resistance simulated experiment is carried out in support roll operational layer sampling, the rolling state of simulation support roll, friction pair is 5%Cr working roll material, load 2000N, rotating speed 400r/min, rotation period is 48000 turns, and rolling resistance test preliminary roller surface roughness Ra value is 0.85 μm, and after test, roll surface roughness Ra value is 0.39 μm.
That enumerates it should be noted that above is only specific embodiments of the invention, obviously the invention is not restricted to above embodiment, has many similar changes thereupon.If all distortion that those skilled in the art directly derives from content disclosed by the invention or associates, protection scope of the present invention all should be belonged to.
Claims (2)
1. have a support roll for roughness retaining capability, its chemical composition by percent mass proportioning is: C:0.40 ~ 0.70%; Si:0.40 ~ 0.80%; Mn:0.50 ~ 0.80%; Cr:4.5 ~ 5.5%; Mo:0.40 ~ 1.00%; V:0.30 ~ 0.50%; Ni:0.40 ~ 0.60%, also containing Nb:0.05 ~ 0.30%; One or both of Ti:0.05 ~ 0.30%, and the mass percent of Nb and Ti meets following formula relation: 0.10≤Nb+Ti≤0.30; All the other are Fe and inevitable impurity; Nb and the Ti element of described content forms the MC silicon carbide thing that form mostly is isometric particle shape, and this MC silicon carbide thing mostly is isometric particle shape, and size is at 1 ~ 2 μm, and distribute disperse.
2. there is the manufacture method of the support roll of roughness retaining capability as claimed in claim 1, it is characterized in that comprising the following steps:
(1) smelt;
(2) forge;
(3) heat treatment after forging;
(4) roughing;
(5) UT (Ultrasonic Testing);
(6) conditioning heat treatment;
(7) semi-finishing;
(8) finished heat treatment: the heating of differential temperature stove, fog quenching and high tempering, described Final Heat Treatment Process parameter is: differential temperature stove Heating temperature is 1020 ~ 1080 DEG C, soaking time is 3 ~ 6 hours, spray cooling 5 ~ 30 hours, described high tempering temperature is 480 ~ 520 DEG C, soaking time is 10 ~ 20 hours;
(9) precision work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210086972.8A CN102634738B (en) | 2012-03-29 | 2012-03-29 | Supporting roller with roughness keeping capability and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210086972.8A CN102634738B (en) | 2012-03-29 | 2012-03-29 | Supporting roller with roughness keeping capability and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102634738A CN102634738A (en) | 2012-08-15 |
| CN102634738B true CN102634738B (en) | 2014-12-24 |
Family
ID=46619314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210086972.8A Active CN102634738B (en) | 2012-03-29 | 2012-03-29 | Supporting roller with roughness keeping capability and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102634738B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384847B (en) * | 2014-10-09 | 2016-07-06 | 贵州航天新力铸锻有限责任公司 | Thermonuclear fusion heap ears U-shaped part welding entirety precision machining method |
| CN105986184B (en) * | 2015-02-09 | 2017-11-28 | 宝钢特钢有限公司 | A kind of steel and its manufacture method for economical MPM tandem rollings plug |
| CN105088085A (en) * | 2015-07-25 | 2015-11-25 | 宜兴市永昌轧辊有限公司 | High-performance cold mill intermediate roll and preparation method thereof |
| CN108277443B (en) * | 2018-01-29 | 2019-12-24 | 二重（德阳）重型装备有限公司 | Support roll of wide and thick plate mill with width of more than 4200mm and manufacturing process thereof |
| CN113549836A (en) * | 2018-08-29 | 2021-10-26 | 石钢京诚装备技术有限公司 | Stud roller sleeve material steel of high-pressure roller press |
| CN112410673B (en) * | 2020-11-18 | 2023-01-31 | 宝钢轧辊科技有限责任公司 | High-speed steel roll for rolling ultrahigh-strength steel plate and manufacturing method thereof |
| CN112779466B (en) * | 2020-12-01 | 2022-05-17 | 邢台德龙机械轧辊有限公司 | Preparation method of chromium alloy strip steel supporting roll |
| CN112792304B (en) * | 2020-12-07 | 2023-05-05 | 邢台德龙机械轧辊有限公司 | Preparation method of large chromium alloy strip steel supporting roller |
| CN112795853B (en) * | 2020-12-16 | 2022-06-17 | 中钢集团邢台机械轧辊有限公司 | Manufacturing method of equal-hardness Cr5 supporting roll |
| CN114381665B (en) * | 2021-12-23 | 2023-07-14 | 中钢集团邢台机械轧辊有限公司 | Medium-thickness plate high-speed steel working roller and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153377A (en) * | 2006-09-27 | 2008-04-02 | 宝山钢铁股份有限公司 | Leveler roll and manufacturing process thereof |
| CN101177765A (en) * | 2006-11-10 | 2008-05-14 | 宝山钢铁股份有限公司 | Disk shearing blade and method for manufacturing the same |
-
2012
- 2012-03-29 CN CN201210086972.8A patent/CN102634738B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153377A (en) * | 2006-09-27 | 2008-04-02 | 宝山钢铁股份有限公司 | Leveler roll and manufacturing process thereof |
| CN101177765A (en) * | 2006-11-10 | 2008-05-14 | 宝山钢铁股份有限公司 | Disk shearing blade and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102634738A (en) | 2012-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102634738B (en) | Supporting roller with roughness keeping capability and manufacturing method thereof | |
| CN110172641B (en) | A kind of fine-grained high-strength and toughness hot work die steel and preparation method thereof | |
| CN102400048B (en) | Cold work roll steel for high-strength steel rolling, cold work roll and its manufacturing method | |
| CN101768698B (en) | Low cost yield strength 700MPA level non-tempering processing high strength steel plate and manufacturing method thereof | |
| CN101596553B (en) | High speed steel roll collar applied to high speed wire rolling mill and manufacture method thereof | |
| CN110129678B (en) | Economical fine-grain high-toughness hot-work die steel and preparation method thereof | |
| CN112743064B (en) | High-nitrogen high-speed steel centrifugal composite roller and preparation process thereof | |
| CN106834886B (en) | Method based on ESP bar strip continuous casting and rolling flow path production thin gauge RE65Mn steel | |
| CN109252104A (en) | High-speed steel and production method thereof | |
| CN103510008A (en) | Hot rolling ferrite/bainite high strength steel plate and manufacturing method thereof | |
| CN102268588B (en) | Steel pipe reducing mill or sizing mill nodular cast iron roller and preparation method thereof | |
| CN100507059C (en) | High-strength toughness steel for continuous sucker rod and method for manufacturing same | |
| CN106939391A (en) | A kind of Ca microalloyings easy-cutting high strength fractured connecting rod steel and manufacture method | |
| CN104593691A (en) | Roller sleeve for large forged alloy steel carrying roller and manufacturing method thereof | |
| CN107779746B (en) | Ultra-fine grain alloy steel with ultrahigh strength, high toughness, corrosion resistance, oxidation resistance and preparation method thereof | |
| CN101974723A (en) | Impact-resistance double-roller roughing roll and manufacturing method thereof | |
| CN102644026A (en) | Cold roll and manufacturing method thereof | |
| CN104018096A (en) | High-speed steel roll collar and preparation method thereof | |
| CN102618788B (en) | Support roll with high abrasion resistant performance and manufacturing method thereof | |
| CN101956141A (en) | Low-cost non-quenched and tempered high-strength wear-resistant steal plate with yield strength of 780 MPa grade and manufacturing method thereof | |
| CN106591730A (en) | Low carbon martensite free-cutting stainless steel and production method thereof | |
| CN1876880A (en) | Cold-work die steel for high speed stamping | |
| CN108149156A (en) | A kind of big specification high uniformity abrasion-resistant stee and its manufacturing method | |
| CN101880836A (en) | A kind of boron-containing die steel and heat treatment method thereof | |
| CN112626414A (en) | Economical low-alloy hot-work die steel 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 |