CN103316918A - Novel composite hot roller and manufacturing method thereof - Google Patents
Novel composite hot roller and manufacturing method thereof Download PDFInfo
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- CN103316918A CN103316918A CN2013101715223A CN201310171522A CN103316918A CN 103316918 A CN103316918 A CN 103316918A CN 2013101715223 A CN2013101715223 A CN 2013101715223A CN 201310171522 A CN201310171522 A CN 201310171522A CN 103316918 A CN103316918 A CN 103316918A
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Abstract
The invention relates to a novel composite hot roller and a manufacturing method thereof, and belongs to the field of hot roller production and manufacture. The hot roller comprises a hot roller body, wherein the hot roller body comprises a roller body and a roller head; an annular groove is formed in the periphery of the roller body; a transition layer is arranged at the bottom of the annular groove; and a working layer is arranged on the transition layer. According to stress distribution characteristics of the hot roller, different welding materials are used, and ingredients and structures of different parts on the surface of the hot roller are changed, so that rolling pressure and thermal stress borne by the hot roller during working are dispersed, and a purpose of improving the performance of the hot roller is achieved. Compared with a corresponding hot roller manufactured with a conventional method, the service life of the hot roller can be prolonged, the processing benefit is increased, the maintenance of the hot roller and a rolling mill is decreased, the manufacturing cost of steel is reduced, and a good economic benefit is realized.
Description
Technical field
The present invention relates to a kind of NEW TYPE OF COMPOSITE hot roll and manufacture method thereof, belong to hot roll and manufacture the field.
Background technology
In hot-rolled steel is produced, hot roll on the rolling mill is one of important consumable part that determines milling train efficient and mill bar quality, the sole mass of hot roll directly affects the type quality of steel, and hot roll is operated under the effect of the high temperature of crossbar transistion and power, its surface is rubbed repeatedly, can produce strong wearing and tearing, therefore, there is quite high requirement in steel mill to the quality of hot roll.And do not stint and adopt whole high-speed steel or the roll of carbide alloy, like this, not only greatly improved production cost, the breaker roll core material also will cause waste, and therefore, it is an important topic of steel mill that hot roll is improved innovation.
At present steel rolling mill improves the mode of innovation to hot roll, generally is to adopt conventional medium carbon steel: such as 55Mn2, and 55Cr, 60CrMnMo, the materials such as 60SiMnMo, and promote the mode of its case hardness, such as modes such as high frequency, intermediate frequency, carburizings.Although this mode has certain effect; But owing to can produce residual stress and thermal stress in the preparatory process of hot roll before making and using; further be subject to again the effect of various cyclic stresses during use; comprise bending, reverse, shearing, contact stress and thermal stress etc.; and these stress are inhomogeneous and continuous variation along the distribution of the body of roll; tracing it to its cause not only has design factor; the continuous causes of change that also has in use wearing and tearing of roll, temperature and roll forming; in addition; rolling condition also often abnormal conditions can occur; it is improper that the while roll cools off after use, also can be subject to the infringement of thermal stress.And roll is except wearing and tearing, crackle also often occurs, rupture, peels off, various local damages and the surface damage such as impression, and above-mentioned reason not only causes the service life of hot roll shorter, also directly affects benefit and the crudy of steel rolling.
Summary of the invention
The object of the invention is to: a kind of stress distribution characteristics according to hot roll are provided, use different welding material, changing composition and the tissue of hot roll surface different parts, thus spreading power, the thermal stress of bearing when disperseing hot roll work and then reach NEW TYPE OF COMPOSITE hot roll and the manufacture method thereof that promotes the hot roll performance.
The present invention realizes above-mentioned purpose by following technical solution:
A kind of NEW TYPE OF COMPOSITE hot roll, it is made of the hot roll body, and the hot roll body comprises the body of roll and roller head, it is characterized in that: be provided with annular groove on the circumference of the body of roll, the annular groove bottom is provided with transition zone, is provided with working lining on the transition zone; Described buffer layer material is: 0Cr17Ni4Cu4Nb steel alloy, the layer depth of transition zone are 20-30mm, and described working layer is cobalt-chromium-tungsten alloy (CoCrW) steel alloy, and the layer depth of working lining is 10-15mm, and described working lining cross section is " T " font.
Its manufacture method may further comprise the steps:
1), at first select suitable blank to make the hot roll body by the design size car, and carry out surface inspection, again according to the length of the hot roll body of roll on request car make suitable annular groove;
2), with acetone soln hot roll body surface greasy dirt is cleaned up, in baking oven the hot roll body is carried out preheating again, 200 °-250 ° of preheat temperatures are incubated 20 minutes;
3), after the preheating of hot roll body finishes, adopt the mode of conventional built-up welding that the 0Cr17Ni4Cu4Nb steel alloy is dissolved in the annular groove bottom, make it become transition zone;
4), after the transition zone built-up welding finishes, adopt the mode of conventional built-up welding that cobalt-chromium-tungsten alloy (CoCrW) steel alloy is dissolved on the transition zone surface, make it become working lining; After the working lining built-up welding is finished, adopt surface grinding machine that the working lining surface is finish grinded, make its roughness reach that Ra0.8 is above to be got final product.
The stress of hot roll when work that adopts manufacturing of the present invention is toward the intermediate distribution of sheet material (product), the hot roll mid portion is bearing larger spreading power, and often hot roll also is crackle, impression, the oxide layer defective (problem) such as come off to occur by middle roll surface, these crackles, impression, oxide layer come off etc. and slowly to spread under the effect of stress, finally cause hot roll to be scrapped.And the stress situation that the present invention bears according to sheet material is oppositely calculated stressing conditions when hot roll is worked, then the hot roll surface texture is improved, composition and the tissue of hot roll surface different parts have been changed, thereby spreading power, the thermal stress of having born when having disperseed hot roll work, and then with minimum manufacturing cost and manufacture difficulty, promoted the service life of hot roll, can make common enterprise all can finish voluntarily the manufacture process (referring to accompanying drawing 2) of hot-rolled steel.
Beneficial effect of the present invention is:
The present invention is according to the stress distribution characteristics of hot roll, use different welding material, changed composition and the tissue of hot roll surface different parts, thus spreading power, the thermal stress of having born when having disperseed hot roll work, and then reached the purpose that promotes the hot roll performance; Compare with the corresponding hot roll of conventional method manufacturing, can effectively improve the service life of hot roll, promoted the benefit of processing, reduced the maintenance time of hot roll and milling train, reduced the manufacturing cost of steel, have good economic benefit.
Description of drawings
Fig. 1 is the structural representation of hot roll of the present invention;
Fig. 2 is the stress distribution finite element analysis figure of hot roll of the present invention when work.
Among the figure: 1, the body of roll, 2, the roller head, 3, annular groove, 4, transition zone, 5, working lining.
The specific embodiment
This NEW TYPE OF COMPOSITE hot roll is made of the hot roll body, and the hot roll body comprises the body of roll 1 and roller head 2.Be provided with annular groove 3 on the circumference of the body of roll 1, annular groove 3 bottoms arrange
HaveLayer depth is 20-30mm, the transition zone 4 that the built-up welding of 0Cr17Ni4Cu4Nb steel alloy forms, and being provided with layer depth on the transition zone 4 is 10-15mm, the working lining 5 that the built-up welding of cobalt-chromium-tungsten alloy (CoCrW) steel alloy forms
,Working lining 5 cross sections are " T " font (referring to Fig. 1).
When this NEW TYPE OF COMPOSITE hot roll is produced, at first select suitable blank to make the hot roll body by the design size car, and carry out surface inspection, again according to the length of the hot roll body of roll on request car make suitable annular groove 3; And with acetone soln hot roll body surface greasy dirt is cleaned up, in baking oven, the hot roll body is carried out preheating again, 200 °-250 ° of preheat temperatures are incubated 20 minutes.
After the preheating of hot roll body is finished, adopt the mode of conventional built-up welding that the 0Cr17Ni4Cu4Nb steel alloy is dissolved in the annular groove bottom, make it become transition zone 4; After transition zone 4 built-up welding are finished, adopt the mode of conventional built-up welding that cobalt-chromium-tungsten alloy (CoCrW) steel alloy is dissolved on transition zone 4 surfaces, make it become working lining 5; After working lining 5 built-up welding are finished, adopt surface grinding machine that working lining 5 surfaces are finish grinded, make its roughness reach that Ra0.8 is above to be got final product.
The transition zone 4 of this NEW TYPE OF COMPOSITE hot roll and working lining 5 material therefors can be selected as the case may be, but must guarantee that transition zone 4 hardness reach more than the 55HRC, and have the ability of good absorption heat; Working lining 5 must adopt hardness to reach the above material of 65HRC, and must guarantee the smooth and slickness on surface.
The present invention is the characteristic of the intermediate distribution of past sheet material (product) according to hot roll its stress when working, stressing conditions when oppositely calculating hot roll work, then by the annular groove 3 on the body of roll 1, and the transition zone 4 of annular groove 3 bottoms and the working lining 5 on the transition zone 4, spreading power and the thermal stress of bearing when disperseing hot roll work, and the heat that produces by transition zone 4 and hot roll bulk absorption working lining 5, thereby reached the purpose that promotes the hot roll performance.
Working lining 5 surfaces of this NEW TYPE OF COMPOSITE hot roll adopt surface grinding machine to finish grind, its roughness can reach more than the Ra0.8, has certain surface quality, become normal distribution with the spreading power that sheet material (product) is subject to aborning, thereby can eliminate the stress of hot roll corner, and then reach the lifting hot roll purpose in service life, and have the characteristics such as simple in structure, successful.
Claims (1)
1. NEW TYPE OF COMPOSITE hot roll, it is made of the hot roll body, the hot roll body comprises the body of roll (1) and roller head (2), it is characterized in that: be provided with annular groove (3) on the circumference of the body of roll (1), annular groove (3) bottom is provided with transition zone (4), is provided with working lining (5) on the transition zone (4); Described transition zone (4) material is: the 0Cr17Ni4Cu4Nb steel alloy, the layer depth of transition zone (4) is 20-30mm, described working lining (5) material is the cobalt-chromium-tungsten alloy steel alloy, and the layer depth of working lining (5) is 10-15mm, and described working lining (5) cross section is " T " font;
Its manufacture method may further comprise the steps:
1), at first select suitable blank to make the hot roll body by the design size car, and carry out surface inspection, again according to the length of the hot roll body of roll on request car make suitable annular groove (3);
2), with acetone soln hot roll body surface greasy dirt is cleaned up, in baking oven the hot roll body is carried out preheating again, 200 °-250 ° of preheat temperatures are incubated 20 minutes;
3), after the preheating of hot roll body finishes, adopt the mode of conventional built-up welding that the 0Cr17Ni4Cu4Nb steel alloy is dissolved in annular groove (3) bottom, make it become transition zone (4);
4), after the transition zone built-up welding finishes, adopt the mode of conventional built-up welding that the cobalt-chromium-tungsten alloy steel alloy is dissolved on transition zone (4) surface, make it become working lining (5); After working lining (5) built-up welding is finished, adopt surface grinding machine that working lining (5) surface is finish grinded, make its roughness reach that Ra0.8 is above to be got final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101715223A CN103316918A (en) | 2013-05-11 | 2013-05-11 | Novel composite hot roller and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101715223A CN103316918A (en) | 2013-05-11 | 2013-05-11 | Novel composite hot roller and manufacturing method thereof |
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| CN103316918A true CN103316918A (en) | 2013-09-25 |
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| CN2013101715223A Pending CN103316918A (en) | 2013-05-11 | 2013-05-11 | Novel composite hot roller and manufacturing method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104858013A (en) * | 2015-05-29 | 2015-08-26 | 四川鸿舰重型机械制造有限责任公司 | Composite roll skin of four-roll crusher and preparation process for composite roll skin |
| CN105127686A (en) * | 2015-09-23 | 2015-12-09 | 邢立杰 | Tension leveler roller preparation process |
| CN106826088A (en) * | 2016-12-29 | 2017-06-13 | 中钢集团邢台机械轧辊有限公司 | Improve the restorative procedure of ductile iron roll homalocephalus wearability |
| CN111589874A (en) * | 2020-05-27 | 2020-08-28 | 陈歌 | Combined roller manufactured in environment-friendly mode and manufacturing method thereof |
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| JPH11342407A (en) * | 1998-05-29 | 1999-12-14 | Hitachi Metals Ltd | Hot plate rolling roll |
| JP2000288606A (en) * | 1999-04-02 | 2000-10-17 | Kanto Special Steel Works Ltd | Complex roll for rolling |
| JP2002088445A (en) * | 2001-07-12 | 2002-03-27 | Kubota Corp | Composite roll |
| CN1438088A (en) * | 2003-03-27 | 2003-08-27 | 上海宝山热喷涂厂 | Large rooler hard-surface build-up welding repairing method |
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| JP2010260072A (en) * | 2009-04-30 | 2010-11-18 | Jfe Steel Corp | Work roll for hot-rolling mill and method of manufacturing it |
| JP2010260073A (en) * | 2009-04-30 | 2010-11-18 | Jfe Steel Corp | Work roll for hot-finishing mill, hot-finishing mill train and rolling method |
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2013
- 2013-05-11 CN CN2013101715223A patent/CN103316918A/en active Pending
Patent Citations (7)
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| JPH11342407A (en) * | 1998-05-29 | 1999-12-14 | Hitachi Metals Ltd | Hot plate rolling roll |
| JP2000288606A (en) * | 1999-04-02 | 2000-10-17 | Kanto Special Steel Works Ltd | Complex roll for rolling |
| JP2002088445A (en) * | 2001-07-12 | 2002-03-27 | Kubota Corp | Composite roll |
| CN1438088A (en) * | 2003-03-27 | 2003-08-27 | 上海宝山热喷涂厂 | Large rooler hard-surface build-up welding repairing method |
| CN101138819A (en) * | 2007-09-14 | 2008-03-12 | 攀钢集团钢城企业总公司 | High-hardness high carbon alloy hammered steel roll set composite manufacturing technology |
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| JP2010260073A (en) * | 2009-04-30 | 2010-11-18 | Jfe Steel Corp | Work roll for hot-finishing mill, hot-finishing mill train and rolling method |
Non-Patent Citations (1)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104858013A (en) * | 2015-05-29 | 2015-08-26 | 四川鸿舰重型机械制造有限责任公司 | Composite roll skin of four-roll crusher and preparation process for composite roll skin |
| CN104858013B (en) * | 2015-05-29 | 2017-10-03 | 四川鸿舰重型机械制造有限责任公司 | Four-roller crusher composite roll skin and its manufacture craft |
| CN105127686A (en) * | 2015-09-23 | 2015-12-09 | 邢立杰 | Tension leveler roller preparation process |
| CN105127686B (en) * | 2015-09-23 | 2017-09-12 | 河北赛强冶金重工机械有限公司 | A kind of withdrawal straightening machine roller preparation technology |
| CN106826088A (en) * | 2016-12-29 | 2017-06-13 | 中钢集团邢台机械轧辊有限公司 | Improve the restorative procedure of ductile iron roll homalocephalus wearability |
| CN111589874A (en) * | 2020-05-27 | 2020-08-28 | 陈歌 | Combined roller manufactured in environment-friendly mode and manufacturing method thereof |
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Application publication date: 20130925 |