CN101628307B - Double-metal straightening roller and manufacturing process thereof - Google Patents
Double-metal straightening roller and manufacturing process thereof Download PDFInfo
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- CN101628307B CN101628307B CN2009100658212A CN200910065821A CN101628307B CN 101628307 B CN101628307 B CN 101628307B CN 2009100658212 A CN2009100658212 A CN 2009100658212A CN 200910065821 A CN200910065821 A CN 200910065821A CN 101628307 B CN101628307 B CN 101628307B
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- 239000010959 steel Substances 0.000 claims abstract description 44
- 239000011162 core material Substances 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000005266 casting Methods 0.000 claims abstract description 17
- 229910001208 Crucible steel Inorganic materials 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 239000002905 metal composite material Substances 0.000 claims abstract description 4
- 238000009499 grossing Methods 0.000 claims description 34
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- 229910001018 Cast iron Inorganic materials 0.000 description 8
- 229910001315 Tool steel Inorganic materials 0.000 description 7
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
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- 150000001875 compounds Chemical class 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
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- 230000008859 change Effects 0.000 description 2
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- 238000005098 hot rolling Methods 0.000 description 2
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Abstract
The invention discloses a double-metal straightening roller and a manufacturing process thereof. The materials of the roller surface and roller core of the double-metal straightening roller are respectively wear-resistant and heat-resistant steel and micro-alloying cast steel, the roller surface and the roller core are molded by adopting double-liquid and double-metal composite casting process, when the straightening roller is molded, two metal liquid are simultaneously cast, the interface combination of the roller core material and the roller surface material is provided with a steel plate, when casting, the rising speeds of the metal liquid levels at both sides of the steel plate are kept the same, the interface alloying combination of the roller surface material and the roller core material is realized after solidification. The double-metal straightening roller of the invention prolongs service life and lowers production cost, thereby being applicable to steel rolling machinery wear-resistant process equipment.
Description
Technical field
The present invention relates to rolling machinery wear-resistant process apparatus field, especially relate to a kind of double-metal straightening roller and manufacturing process thereof.
Background technology
Aligning is the final production operation of hot rolling merchant tron; The operating temperature of hot rolling smoothing roll is generally in 500～700 ℃ of scopes; Not only to guarantee dimensional accuracy, the shape need of shaped steel but also guaranteeing the surface quality of shaped steel, blemish such as roll marks, cut can not occur; Should improve the straightener operating rate, reduce frequent roll change; Avoid roll surface to produce uneven wear and damage again, smoothing roll must have excellent abrasive ability, scratch resistance performance and resistance deformation performance, to guarantee its service life and serviceability.
The surface of smoothing roll is processed to certain pass usually, and when the aligning steel, the pass surface directly contacts with shaped steel, under the effect of temperature and pressure, when work, mainly bears flexural fatigue and strong wearing and tearing.So exigent case hardness, enough rigidity and high-fatigue strength (comprising contact fatigue), under the effect of thermal stress repeatedly, not generation of cracks, oxidation.China's shaped steel smoothing roll uses alloy tool steel and the higher chill alloy cast iron of nickeliferous chrome molybdenum to make mostly.The alloy tool steel straightening roller adopts forging method production more, and the chilled cast iron smoothing roll adopts casting method production more.The smoothing roll toughness that alloy tool steel is made is high, but the wear resistence relative deficiency increases smoothing roll and changes frequency.The wear resistence of chilled cast iron smoothing roll is enough high, but toughness is lower, is easy to occur crackle in the use, influences product quality.And, the costing an arm and a leg of the chill alloy cast iron smoothing roll that alloy tool steel and nickeliferous chrome molybdenum are higher, processing difficulties makes that the smoothing roll cost is higher, has restricted the reduction of shaped steel production cost.
Summary of the invention
In view of this; Not enough in order to overcome alloy tool steel material smoothing roll wear resistence; Change frequent and shortcomings such as chilled cast iron smoothing roll toughness is lower, price height, the present invention provides a kind of double-metal straightening roller, improves the service life of smoothing roll and reduces its production cost.
For achieving the above object, the present invention adopts following technical scheme:
The roll surface of this double-metal straightening roller and the material of roller core adopt wearproof heat-resistant steel and microalloyed cast steel respectively, and roller core and roll surface composite casting are one; Wherein, said wearproof heat-resistant steel, its chemical composition is by weight percentage: C0.30～0.60, Si0.6～1.4, Mn＜1.2; Cr1.3～5.5, Mo0.4～3.0, Ni1.40～1.80, W0～5.3, V0.8～1.2; Al0～1.5, P≤0.03, S≤0.03, surplus is Fe; The chemical composition of said microalloying cast steel is by weight percentage: C0.30～0.45, and Si≤0.5, Mn0.8～1.6, P≤0.04, S≤0.04, surplus is Fe and trace element.
Another object of the present invention is to provide the manufacturing process of described double-metal straightening roller.
The manufacturing process of this double-metal straightening roller may further comprise the steps:
Adopt double-fluid double metal composite casting manufactured smoothing roll blank; Sand mold being used for pouring into a mould the smoothing roll blank is provided with steel plate; Steel plate is separated into roller core die cavity and roll surface die cavity with die cavity; The melting respectively of roller core material and roll surface material is cast in roller core die cavity and roll surface die cavity respectively with roller core material metal liquid and roll surface material metal liquid then simultaneously, keeps the molten metal liquid level rate of climb of steel plate both sides to equate in the casting process; After solidifying, roller core material and roll surface material are realized metallurgical binding on the interface of roller core die cavity and roll surface die cavity.
Further, the thickness of said steel plate is 1-5mm.
Further, said steel plate is shaped as cylindric.
The invention has the beneficial effects as follows:
The roll surface of double-metal straightening roller of the present invention and the material of roller core adopt wearproof heat-resistant steel and microalloying cast steel respectively; Wherein, Wearproof heat-resistant steel is the steel grade that at high temperature has excellent abrasive resistance, obdurability and non-oxidizability; Can satisfy the performance requirement of smoothing roll roll surface, but contain more alloying element, smoothing roll is all made then cost height with wearproof heat-resistant steel; Microalloying cast steel has good toughness, and cost is low, but the wearability under its high temperature is low, satisfies the performance requirement of roll body material; It is one that double-metal straightening roller roll surface of the present invention and roller core adopt rational wearproof heat-resistant steel of component and microalloying cast steel composite casting respectively; Not only the wear-resistant heat resistance of roll surface wearproof heat-resistant steel toughness better, roller core microalloying cast steel is more excellent; And give full play to the advantage of wearproof heat-resistant steel and two kinds of materials of microalloying cast steel; Effectively improve the service life of shaped steel smoothing roll, and reduce cost.Use a kind of material at high temperature to reach high wearability, high tenacity and good non-oxidizability simultaneously is difficult to realize in actual production very much.Manufacturing process of the present invention is to utilize the method for casting that two or more physical chemistry, mechanical property different metallic material are realized metallurgical binding on the interface and a kind of method of preparing the bimetallic compound casting.The compound casting of this method preparation has been taken into account the performance advantage of two kinds of materials, at the different parts of part different performances is provided.Through the reasonable cooperation of roll surface material and roll body material, can reach the needed metallurgical performance of smoothing roll real work, and its production cost is reduced.Manufacture craft of the present invention is two or more physical chemistry, mechanical property different metallic material are realized metallurgical binding and to prepare a kind of method of bimetallic compound casting on the interface; Give full play to the advantage of wearproof heat-resistant steel and two kinds of materials of microalloying cast steel; Effectively improve the service life of shaped steel smoothing roll, and reduce cost.Double-metal straightening roller of the present invention overcome chilled cast iron smoothing roll toughness lower, be difficult for shortcomings such as welding, processing difficulties and price height, solved single use steel alloy and made that the smoothing roll cost is high, toughness is not enough and the difficult problem of processing difficulties.Double-metal straightening roller of the present invention is compared with the chilled cast iron smoothing roll; Improve the service life of smoothing roll more than 1.5 times, production cost reduces more than 20%, compares with the smoothing roll of alloy tool steel material; Improve the service life of smoothing roll more than 1 times, production cost reduces more than 30%.
Other advantages of the present invention, target and characteristic will be set forth in specification subsequently to a certain extent; And to a certain extent; Based on being conspicuous to those skilled in the art, perhaps can from practice of the present invention, obtain instruction to investigating of hereinafter.Target of the present invention and other advantages can be passed through following specification, claims, and the structure that is particularly pointed out in the accompanying drawing realizes and obtains.
Description of drawings
Fig. 1 is a double-metal straightening roller casting technique sketch map of the present invention.
Fig. 2 is the vertical view of Fig. 1.
The specific embodiment
Like Fig. 1, shown in Figure 2, the roll surface of the double-metal straightening roller in the present embodiment and the material of roller core adopt wearproof heat-resistant steel and microalloying cast steel respectively, and roll surface and roller core composite casting are one; Wherein Reference numeral 1,5 is indicated running channels; Reference numeral 2,3 indication insulated feeders; Reference numeral 4 indication steel plates; Reference numeral 6 indication molding sand; Reference numeral 7 indication cores; Reference numeral 8 indication refractory brick depositings.According to the smelting program of strictness, the component of metal material meets following requirement after the moulding of control casting of metals when smelting microalloying cast steel and two kinds of metal materials of wearproof heat-resistant steel: promptly said wearproof heat-resistant steel, and its chemical composition is by weight percentage: C0.30～0.60, Si0.6～1.4; Mn＜1.2, Cr1.3～5.5, Mo0.4～3.0, Ni1.40～1.80; W0～5.3, V0.8～1.2, Al0～1.5; P≤0.03, S≤0.03, surplus is Fe; The chemical composition of said microalloying cast steel is by weight percentage: C0.30～0.45, and Si≤0.5, Mn0.8～1.6, P≤0.04, S≤0.04, surplus is Fe and trace element.During enforcement; At first adopt double-fluid double metal composite casting manufactured smoothing roll blank; Before the cast, be placed with certain thickness steel plate 4 at the preset roll surface material and the junction, interface of roller core material, the shape of present embodiment light plate 4 is cylindric; The thickness of steel plate 4 is: 3.5mm, and steel plate 4 is separated into roller core die cavity and roll surface die cavity with die cavity; During cast; The molten metal bath of microalloying cast steel and two kinds of metals of wearproof heat-resistant steel is poured into a mould simultaneously; The molten metal of microalloying cast steel and wearproof heat-resistant steel pours into roller core die cavity and roll surface die cavity from running channel 1 and running channel 5 respectively; Keep the molten metal liquid level rate of climb of steel plate both sides to equate that after the cast, roller core material that solidifies and roll surface material are realized metallurgical binding on the interface of roller core die cavity and roll surface die cavity during cast; Promptly obtain the double-metal straightening roller blank cast; The mode of said metallurgical binding is different from the mechanical bond mode, the roller core of unlike material and roll surface permanently, be combined as a whole securely, thereby help to improve whole straightening roller life and performance; At last, also need the smoothing roll blank is handled through subsequent handling, comprise oil quenching (or air quenching) and temper.The double-metal straightening roller that present embodiment finally obtains is compared with the chilled cast iron smoothing roll; Improve 2 times the service life of smoothing roll, production cost reduces by 30%, compares with the smoothing roll of alloy tool steel material; Improve 1 times the service life of smoothing roll, production cost reduces by 30%.
Explanation is at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Other modifications that those of ordinary skills make technical scheme of the present invention perhaps are equal to replacement; Only otherwise break away from the spirit and the scope of technical scheme of the present invention, all should be encompassed in the middle of the claim scope of the present invention.
Claims (3)
1. double-metal straightening roller, it is characterized in that: the roll surface of this double-metal straightening roller and the material of roller core adopt wearproof heat-resistant steel and microalloying cast steel respectively, and roller core and roll surface composite casting are one; Wherein, said wearproof heat-resistant steel, its chemical composition is by weight percentage: C0.30～0.60, Si0.6～1.4, Mn＜1.2; Cr1.3～5.5, Mo0.4～3.0, Ni1.40～1.80, W0～5.3, V0.8～1.2; Al0～1.5, P≤0.03, S≤0.03, surplus is Fe; The chemical composition of said microalloying cast steel is by weight percentage: C0.30～0.45, and Si≤0.5, Mn0.8～1.6, P≤0.04, S≤0.04, surplus is Fe and trace element; The making of this double-metal straightening roller comprises the steps:
Adopt double-fluid double metal composite casting manufactured smoothing roll blank; Sand mold being used for pouring into a mould the smoothing roll blank is provided with steel plate; Steel plate is separated into roller core die cavity and roll surface die cavity with die cavity; The melting respectively of roller core material and roll surface material is cast in roller core die cavity and roll surface die cavity respectively with roller core material metal liquid and roll surface material metal liquid then simultaneously, keeps the molten metal liquid level rate of climb of steel plate both sides to equate in the casting process; After solidifying, roller core material and roll surface material are realized metallurgical binding on the interface of roller core die cavity and roll surface die cavity.
2. double-metal straightening roller according to claim 1 is characterized in that: the thickness of said steel plate is 1-5mm.
3. double-metal straightening roller according to claim 2 is characterized in that: said steel plate is shaped as cylindric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100658212A CN101628307B (en) | 2009-08-18 | 2009-08-18 | Double-metal straightening roller and manufacturing process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100658212A CN101628307B (en) | 2009-08-18 | 2009-08-18 | Double-metal straightening roller and manufacturing process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101628307A CN101628307A (en) | 2010-01-20 |
| CN101628307B true CN101628307B (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100658212A Expired - Fee Related CN101628307B (en) | 2009-08-18 | 2009-08-18 | Double-metal straightening roller and manufacturing process thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104946982B (en) * | 2014-03-25 | 2017-02-08 | 宝山钢铁股份有限公司 | Wide thick plate hot-straightening machine working roll and manufacturing method thereof |
| CN114850452B (en) * | 2021-02-03 | 2024-06-25 | 中国石油天然气集团有限公司 | Wear-resistant workpiece manufacturing method |
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- 2009-08-18 CN CN2009100658212A patent/CN101628307B/en not_active Expired - Fee Related
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Granted publication date: 20120613 Termination date: 20130818 |