CN1312315C - Process for surface treatment of alloy roller and its mfg. method - Google Patents
Process for surface treatment of alloy roller and its mfg. method Download PDFInfo
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- CN1312315C CN1312315C CNB2004100511075A CN200410051107A CN1312315C CN 1312315 C CN1312315 C CN 1312315C CN B2004100511075 A CNB2004100511075 A CN B2004100511075A CN 200410051107 A CN200410051107 A CN 200410051107A CN 1312315 C CN1312315 C CN 1312315C
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Abstract
The present invention discloses a method for surface treatment of an alloy roller. The method comprises the following steps: the roller is treated in a liquid nitriding mode; a nitrided structure layer of which the thickness is 15 mu m to 35 mu m is formed on the surface of the roller; the roller is treated in a sandblasting mode or in a shot blasting mode, and a loose layer outside a compound layer is removed; the roller is oxidized, and the surface of the nitrided structure layer is covered on an oxidized layer. In addition, the present invention also discloses a method for manufacturing an alloy roller, and ingredients and contents of alloy adopted by the method for manufacturing an alloy roller. Material of the present invention is strictly and reasonably selected, and modification treatment is carried out. Therefore, the roller has good wear resistance, good corrosion resistance and good high temperature resistance, the work quality of the roller is obviously enhanced, the service life of the roller is obviously extended, the production cost is obviously reduced, and the purposes of material saving, energy saving, high efficiency, and long service life are obtained.
Description
Technical field
The present invention relates to a kind of surface treatment method and manufacture method of alloy roll.
Background technology
Roll is a crucial part in electric wire (aluminium, copper and the alloy pole stock thereof) continuous mill, be the easily-consumed products that consumption was big, occupied fund is many during aluminium (copper) and alloy pole stock thereof were produced, its quality and performance level are directly determining production efficiency, quality product and the state of the art of electric wire.Because the stressing conditions complexity during roll work: will bear bigger nip load on the one hand, the R groove of roll directly contacts, pushes with aluminium (copper) bar of red heat when work; Simultaneously, R groove place rubs mutually with the hot metal of viscous deformation, is easy to generate adhesion and wearing and tearing, reduces rolling accuracy; On the other hand, each position of R groove the time is heated repeatedly in work and catches a cold, contact with hot metal, when pushing, the contact surface temperature raises rapidly, and be subjected to the Quench of cooling fluid, therefore often be in the mal-condition work of Quench and sharp thermal cycling, form very big thermal stresses, and this thermal stresses is that direction alternately produces on the contrary, R groove place very easily produces heat fatigue cracking, and expansion gradually, form be full of cracks, finally cause roll to lose efficacy.And existing roll, the generally employing 42CrMo material of rolling aluminium, the common employing 5CrMnMo material of rolling copper material, the composition of the material of two kinds of rolls is respectively:
| C | Mn | Cr | Mo | |
| 42CrMo 5CrMnMo | 0.38～0.45 0.50～0.60 | 0.50～0.80 1.20～1.60 | 0.90～1.20 0.60～0.90 | 0.15～0.25 0.15～0.30 |
As can be seen, all add more Cr element and Mn element among 42CrMo and the 5CrMnMo, and Cr element and Mn element all can cause temper brittleness from material composition composition table, especially the Mn element more can reduce the thermal conductivity of steel, and bigger superheated susceptivity is arranged.Existing in addition roll all is to make through common mechanical workout and conventional thermal treatment, although add require roll R groove place man-hour smooth finish up to 1.6, but, thereby can't fundamentally solve the problem of adhesion roll surface under the non-ferrous metal high temperature owing to reasons such as the character that does not change the metallic surface and roller surface are corroded.There is following problem in therefore existing roll: situations such as high temperature wear, thermal fatigue be full of cracks and formation sticking to mould appear in R groove place too early in the use; cause roll short work-ing life; problems such as rolling quality is not high; need frequent shutdown to change roll in the work; seriously influenced quality product; reduce production output, increased production cost.
More than be with regard to the selection of material, composition and the content breaker roll quality and the Effect on Performance of alloy has been described.And facts have proved that the damage of roll and inefficacy often occur in the surface or begun by the surface, the quality of visible surface performance directly affects the use properties and the life-span of roll.Therefore, the surface property that improves roll is the key of dealing with problems.And in the prior art, the breaker roll of almost having no talent carries out surface treatment to improve its surface property.
Summary of the invention
The technical problem to be solved in the present invention provides a kind ofly carries out the surface-treated method to the alloy roll, to improve surface hardness, wear resistance and the thermal fatigue resistance rimose ability of roll, reduce the roll surface wear rate, the tendency that reduces surface imperfection and crack, the fatigue strength and the etch resistant properties of raising roll.
Another technical problem that will solve of the present invention provides a kind of manufacture method of alloy roll, adopts the alloy roll of this method manufacturing to have higher surface hardness, wear resistance and thermal fatigue resistance rimose ability, the fatigue strength of roll and etch resistant properties height.
The present invention also has a technical problem that will solve to provide a kind of alloying constituent and content of the steel alloy that adopts when stating method alloying roll in the use in addition, and the steel alloy with this kind composition and content can further improve the wear resistance and the thermal fatigue resistance rimose ability of roll.
For of the present invention the alloy roll is carried out the surface-treated method, this technical problem is solved like this: this surface treatment method may further comprise the steps, at first this roll is carried out liquid nitriding and handle, make roller surface form the nitriding structure layer of thickness 15 μ m～35 μ m; Then this roll is sandblasted or shot peening, remove the tectorium of compound layer outside; Again this roll is carried out oxide treatment, make nitriding structure laminar surface capping oxidation layer.
In the nitriding of above-mentioned surface treatment method is handled, compositions such as the Cr in the alloy material of roll, Mo, V all can form the nitride of hardness height, good stability with nitrogen, and be distributed in the nitrided case with disperse state, make its dispersion-strengthened, have more high rigidity and wear resistance; Make roller surface form the nitriding structure layer (bright layer+diffusion layer) of thickness 15 μ m～35 μ m after nitriding is handled, surface hardness is Hv750～Hv1200, and wear resistance improves greatly; Diffusion layer below the bright layer can improve the fatigue strength of material simultaneously, has improved thermal fatigue resistance rimose ability.Behind liquid nitriding, sandblast or shot peening, can remove the tectorium of compound layer outside, improve the wear resistance of workpiece, be subjected to the opposite prestress of force direction when making workpiece surface produce simultaneously, improve the fatigue strength of workpiece with work.After sandblasting, carry out oxide treatment, not only reduced the surfaceness of workpiece, make its outward appearance become pleasing, reduced the friction between roll and the red heat blank, reduce the resistance to flow of blank, make relatively sliding more good, also improved the oxygen level in the compound layer greatly, thereby further improve the etch resistant properties of workpiece.
Manufacture method for alloy roll of the present invention, this technical problem is solved like this: its processing step comprises steel part normalizing, modifier treatment, after modifier treatment, go back breaker roll and carry out surface treatment, its step is as follows: at first this roll is carried out liquid nitriding and handle, making roller surface form thickness is the nitriding structure layer of 15 μ m～35 μ m; Then this roll is sandblasted or shot peening, remove the tectorium of compound layer outside; Again this roll is carried out oxide treatment, make nitriding structure laminar surface capping oxidation layer.
Above-mentioned the alloy roll is carried out the manufacture method of surface-treated method and alloy roll, all improved the wear resistance and the thermal fatigue resistance rimose ability of roll greatly, reduced the roll surface wear rate, the tendency that has reduced surface imperfection and cracked; Make roll the time be not easy to produce adhesion, interlock, hot glue and phenomenon such as in work, performances such as hardness, intensity, toughness, wear resistance, fatigue resistance, anti-binding property are reached use needed best fit, thus improved greatly roll work-ing life and the surface smoothness of rolling pole stock.
Manufacture method for above-mentioned alloy roll, preferably can adopt following alloying constituent and content: 0.35%～0.65% C, 0.50%～0.80% Mn, 0.90%～1.50% Cr, 0.30%～0.50% Mo, 0.15%～0.45% V, all the other are Fe and unavoidable impurities.
Technique scheme is by increasing the content of strong carbide forming element Mo, to obtain the alloy carbide of sufficient amount, improve the hardening capacity and the high temperature creep strength of steel, increase temper resistance and age hardening effect, Mo can suppress chromium, the caused temper brittleness of manganese element simultaneously; Reduced the content of the alloying element Mn that produces superheated susceptivity and aggravation temper brittleness; Having added can crystal grain thinning, reduce steel superheated susceptivity, significantly improve the V element of the wear resistance and the red hardness of steel.
Improved the temper resistance of material by the rational Match of above alloying constituent, make roll surface alternately be heated with process of cooling in unlikely generation tempering and reduce hardness, temper brittleness more can not occur, thereby improve the ability of its thermal fatigue resistance.Element such as Mo, V is separated out with the carbide form when tempering and is produced secondary hardening, makes roll keep quite high hardness under comparatively high temps, has improved the hot strength of material, satisfies the requirement of wear resistance and obdurability.Make the long service life of roll, rolling quality product height also need not frequent shutdown and changes roll in the work, high efficiency, and production cost is low.
After strict reasonably selection and modification processing, give this roll with good wear-resistant, corrosion-resistant and resistance to elevated temperatures, significantly improve the work quality and the work-ing life of roll, production cost is obviously reduced, reach the purpose of economical with materials, save energy and high-efficiency long-life.
Embodiment
Below in conjunction with embodiment alloy roll of the present invention and surface treatment method thereof and manufacture method are described in further detail, below listed embodiment be indefiniteness embodiment of the present invention, can adjust in the scope that allows about composition proportion and processing parameter, this adjustment does not have substantial effect to the present invention.
Embodiment one: the material of the roll that this is routine is formed and weight content is: the C of 0.55-0.65%, and the Mn of 0.50-0.80%, the Cr of 0.90-1.50%, the Mo of 0.30-0.40%, the V of 0.15-0.45%, all the other are Fe and unavoidable impurities.Its material can adopt existing metallurgical technology to make, and carries out special surface treatment on the material of this molding roller, promptly between steel part normalizing and modifier treatment two step process, carries out high-temperature tempering process and handles; And after modifier treatment, carry out surface treatment, and promptly carrying out thermal pretreatment earlier, the temperature condition of this thermal pretreatment is 300～400 ℃, the treatment time is 20～150min; Carry out liquid nitriding, sandblast (or shot-peening) and oxide treatment then, wherein the temperature condition of liquid nitriding processing is 500～580 ℃, and the treatment time is 120～300min; The temperature of oxide treatment is 350～500 ℃, and the treatment time is 10～30min.Form the nitriding structure layer of 20 μ m left and right thicknesses at roller surface after above-mentioned surface treatment, be coated with zone of oxidation at the nitriding structure laminar surface, the surface hardness of roll is in Hv800～900.
Embodiment two: the material of the roll that this is routine is formed and weight content is: 0.35% C, and 0.80% Mn, 0.90% Cr, 0.50% Mo, 0.16% V, all the other are Fe and unavoidable impurities.Its material can adopt existing metallurgical technology to make, and carries out special surface treatment on the material of this molding roller, promptly between steel part normalizing and modifier treatment two step process, carries out high-temperature tempering process and handles; And after modifier treatment, carry out surface treatment, and promptly carrying out thermal pretreatment earlier, the temperature condition of this thermal pretreatment is 300～400 ℃, the treatment time is 20～150min; Carry out liquid nitriding, sandblast (or shot-peening) and oxide treatment then, wherein the temperature condition of liquid nitriding processing is 500～580 ℃, and the treatment time is 120～300min; The temperature of oxide treatment is 350～500 ℃, and the treatment time is 10～30min.Form the nitriding structure layer of 25 μ m left and right thicknesses at roller surface after above-mentioned surface treatment, be coated with zone of oxidation at the nitriding structure laminar surface, the surface hardness of roll is at Hv950.
Embodiment three: the material of the roll that this is routine is formed and weight content is: 0.45% C, and 0.65% Mn, 1.30% Cr, 0.40% Mo, 0.30% V, all the other are Fe and unavoidable impurities.Its material can adopt existing metallurgical technology to make, also can directly purchase ready-made content and the identical therewith alloy material of composition is made roll, and on the material of this molding roller, carry out special surface treatment, promptly between steel part normalizing and modifier treatment two step process, carry out high-temperature tempering process and handle; And after modifier treatment, carry out surface treatment, and promptly carrying out thermal pretreatment earlier, the temperature condition of this thermal pretreatment is 300～400 ℃, the treatment time is 20～150min; Carry out liquid nitriding, sandblast and oxide treatment then, wherein the temperature condition of liquid nitriding processing is 500～580 ℃, and the treatment time is 120～300min; The temperature of oxide treatment is 350～500 ℃, and the treatment time is 10～30min.Through form the nitriding structure layer of 30 μ m left and right thicknesses after the above-mentioned surface treatment at roller surface, be coated with zone of oxidation at the nitriding structure laminar surface, the surface hardness of roll is at Hv1000.
Surface treatment method of the present invention and manufacture method not only can be effective at the alloy roll that contains mentioned component and content, and feasible too to other alloy roll.Other selectable material mainly comprises: 35CrMoV, 60CrMoV, 45CrNiMoV, 45CrNiMolV, 40CrNiMo, 45CrNi2MoV, 40CrNi2Mo, 50CrNi3Mo, 5CrNiMo, 60Cr2Mo, 42Cr2MoV etc.
Claims (8)
1, a kind of surface treatment method of alloy roll is characterized in that: this roll is carried out liquid nitriding handle, make roller surface form the nitriding structure layer of thickness 15 μ m～35 μ m; Then this roll is sandblasted or shot peening, remove the tectorium of compound layer outside; Again this roll is carried out oxide treatment, make nitriding structure laminar surface capping oxidation layer;
The temperature condition that described liquid nitriding is handled is 500～580 ℃, and the treatment time is 120～300min; The temperature of described oxide treatment is 350～500 ℃, and the treatment time is 10～30min.
2, surface treatment method according to claim 1 is characterized in that: also carry out thermal pretreatment before liquid nitriding is handled, the temperature condition of this thermal pretreatment is 300～400 ℃, and the treatment time is 20～150min.
3, surface treatment method according to claim 2 is characterized in that: after making roller surface form nitriding structure layer and zone of oxidation, its surface hardness is at Hv750～Hv1200.
4, a kind of manufacture method of alloy roll, its processing step comprises steel part normalizing, modifier treatment, it is characterized in that: go back breaker roll and carry out surface treatment after modifier treatment, its step is as follows:
At first this roll is carried out liquid nitriding and handle, make roller surface form the nitriding structure layer of thickness 15 μ m～35 μ m; Then this roll is sandblasted or shot peening, remove the tectorium of compound layer outside; Again this roll is carried out oxide treatment, make nitriding structure laminar surface capping oxidation layer;
The temperature condition that described liquid nitriding is handled is 500～580 ℃, and the treatment time is 120～300min; The temperature of described oxide treatment is 350～500 ℃, and the treatment time is 10～30min.
5, manufacture method according to claim 5 is characterized in that: also carry out thermal pretreatment before liquid nitriding is handled, the temperature condition of this thermal pretreatment is 300～400 ℃, and the treatment time is 20～150min.
6, manufacture method according to claim 5 is characterized in that: after making roller surface form nitriding structure layer and zone of oxidation, its surface hardness is at Hv750～Hv1200.
7, according to any one described manufacture method of claim 4 to 6, it is characterized in that: between steel part normalizing and modifier treatment two step process, also carry out high-temperature tempering process and handle.
8, manufacture method according to claim 4, it is characterized in that: alloying constituent that this manufacture method adopted and content are 0.35%～0.65% C, 0.50%～0.80% Mn, 0.90%～1.50% Cr, 0.30%～0.50% Mo, 0.15%～0.45% V, all the other are Fe and unavoidable impurities.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100511075A CN1312315C (en) | 2004-08-11 | 2004-08-11 | Process for surface treatment of alloy roller and its mfg. method |
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|---|---|---|---|
| CNB2004100511075A CN1312315C (en) | 2004-08-11 | 2004-08-11 | Process for surface treatment of alloy roller and its mfg. method |
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| CN1598037A CN1598037A (en) | 2005-03-23 |
| CN1312315C true CN1312315C (en) | 2007-04-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101856778A (en) * | 2010-05-18 | 2010-10-13 | 武汉科技大学 | Method for repairing continuous casting and rolling roller of aluminum pole |
Families Citing this family (6)
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|---|---|---|---|---|
| CN101745788B (en) * | 2009-12-08 | 2012-05-23 | 武汉科技大学 | Method for manufacturing continuous casting and rolling roller of aluminum wire rod |
| CN102443808B (en) * | 2010-10-15 | 2013-12-11 | 中国科学院金属研究所 | Stainless steel surface corrosion-resistant oxynitriding coriaceous layer as well as preparation method and application thereof |
| CN107236857A (en) * | 2017-06-13 | 2017-10-10 | 安徽绿环泵业有限公司 | A kind of processing method for improving chemical pump pump shaft salt fog resistance |
| CN110257594B (en) * | 2019-07-29 | 2023-05-16 | 湖南力方轧辊有限公司 | Prefabricated surface oxide film hot roll process and equipment |
| CN110614481A (en) * | 2019-08-02 | 2019-12-27 | 台州磊达型钢冷拔有限公司 | Machining process of guide rail |
| CN111705204A (en) * | 2020-07-30 | 2020-09-25 | 常熟市市南模具有限责任公司 | Oxidation heat treatment process for glass mold |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031573A (en) * | 1988-04-23 | 1989-03-08 | 浙江大学 | Reinforcement method of steel surface |
| CN1329181A (en) * | 2001-06-14 | 2002-01-02 | 上海交通大学 | Rapid high-temp. gas nitration process for TiAl base alloy |
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2004
- 2004-08-11 CN CNB2004100511075A patent/CN1312315C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031573A (en) * | 1988-04-23 | 1989-03-08 | 浙江大学 | Reinforcement method of steel surface |
| CN1329181A (en) * | 2001-06-14 | 2002-01-02 | 上海交通大学 | Rapid high-temp. gas nitration process for TiAl base alloy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101856778A (en) * | 2010-05-18 | 2010-10-13 | 武汉科技大学 | Method for repairing continuous casting and rolling roller of aluminum pole |
| CN101856778B (en) * | 2010-05-18 | 2011-11-16 | 武汉科技大学 | Method for repairing continuous casting and rolling roller of aluminum pole |
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| CN1598037A (en) | 2005-03-23 |
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Assignee: Henan Tongda Cable Co., Ltd. Assignor: Jiahe Electromechanical Equipment Co., Ltd., Deyang City Contract fulfillment period: 2008.1.11 to 2018.1.10 Contract record no.: 2009410000198 Denomination of invention: Process for surface treatment of alloy roller and its mfg. method Granted publication date: 20070425 License type: Exclusive license Record date: 20090827 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.1.11 TO 2018.1.10; CHANGE OF CONTRACT Name of requester: HENAN TONGDA CABLE CO., LTD. Effective date: 20090827 |
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Effective date of registration: 20170526 Address after: 618000 Tianyuan Industrial Development Zone, Deyang City, Sichuan Province, Bohai road and Helan mountain road intersection Patentee after: Deyang Dongjiagang intelligent equipment manufacturing Limited by Share Ltd Address before: 618000 Deyang Zhujiang Road, Sichuan, No. 99 Patentee before: Jiahe Electromechanical Equipment Co., Ltd., Deyang City |
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Granted publication date: 20070425 Termination date: 20190811 |