CN101654734B - Method for manufacturing alloy nodular cast iron roll of universal mill - Google Patents
Method for manufacturing alloy nodular cast iron roll of universal mill Download PDFInfo
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- CN101654734B CN101654734B CN2008100128546A CN200810012854A CN101654734B CN 101654734 B CN101654734 B CN 101654734B CN 2008100128546 A CN2008100128546 A CN 2008100128546A CN 200810012854 A CN200810012854 A CN 200810012854A CN 101654734 B CN101654734 B CN 101654734B
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Abstract
The invention relates to a method for manufacturing an alloy nodular cast iron roll of a universal mill. The method comprises the following steps of smelting, spheroidizing and inacubating of molten iron, casting the rolls, cooling and unpacking, and pre-opening hole patterns, and adopts a heat treatment process after the pre-opening of the hole patterns, so that after the roll is subjected to high temperature austenization and homogenization and is quickly cooled, matrix structures of the slot bottom and lateral surfaces of the slotted roll are refined to meet the requirements of the slot bottom and the lateral surfaces of the roll on wear resistance. The method adopts the heat treatment process after the pre-opening of the hole patterns, so that after the roll is subjected to high temperature austenization and homogenization and is quickly cooled, matrix structures are refined, and the wear resistance of the slot bottom and the lateral surfaces of the roll is greatly improved.
Description
Technical field
The present invention relates to the method for manufacture of a kind of method of manufacture of grain roll, particularly a kind of alloy nodular cast iron roll of universal mill.
Background technology
The former forged steel material roll that generally uses of universal mill alloy ball iron BD2 roll, the wearing no resistance of roll.For improving the wear resistance of BD2 roll, can consider to use the alloy nodular cast iron material, still, the inside and outside hardness drop of alloy nodular cast iron material is big, because the pass that the BD2 roll is opened is deep, makes the bottom land and the side of ending concave roll wear no resistance.
Summary of the invention
For overcoming the defective of prior art; The method of manufacture that the purpose of this invention is to provide a kind of alloy nodular cast iron roll of universal mill, this method be through adopting thermal treatment process behind the pre-drilled cavity groove on the breaker roll, make roll through high temperature austeniteization and homogenizing after; Through quick cooling; Matrix obtains refinement, makes the bottom land and the side matrix of fluting roll obtain refinement, and the bottom land of roll and side wear resisting property improve greatly.
Technology contents of the present invention is narrated as follows:
A kind of method of manufacture of alloy nodular cast iron roll of universal mill comprises melting, molten iron nodularization and inoculation, the casting roll; Cooling is unpacked, the pre-drilled cavity type, and this method adopts thermal treatment process behind the pre-drilled cavity type; After making roll through high temperature austeniteization and homogenizing; Through quick cooling, make the bottom land and the side matrix of fluting roll obtain refinement, satisfy the bottom land and the lateral wear resisting property of roll.
Described dark bottom land and roller surface apart from roller surface 180-220mm all is controlled to be troostitic structures.
Described apart from the dark bottom land of roller surface 180-220mm and the difference of hardness≤1.5HsD of roller surface.
Described roll component need satisfy following requirement, ratio by weight:
C?3.1～3.6、Si?0.5～1.5、Mn?0.3～0.7、P<0.1、S<0.03、Cr?0.1～0.5、Ni?2.0～3.0、Mo?0.20～0.60；
The step of described thermal treatment process is:
1) slowly heating before 200 ℃, temperature rise speed≤30 ℃/h were to 200-300 ℃ of insulation 8-12 hour;
2) slowly heat with the temperature rise speed of≤30 ℃/h again, be heated to 400-600 ℃ of insulation 8-12 hour;
3) slowly heat with the temperature rise speed of≤30 ℃/h again, be heated to 800-1000 ℃ of insulation 10-30 hour;
4) carry out quench treatment then, in 10 hours, be cooled to 300-400 ℃, be incubated 5-10 hour;
5) carry out temper again, be warming up to 450-650 ℃, be incubated 20-40 hour;
6) again with the cooling rate cooling of≤30 ℃/h, come out of the stove.
Compared with prior art, the invention has the beneficial effects as follows:
Technology is simple, and cost of manufacture is low.Roll doubles than former forged steel roll work-ing life, and the comparable forged steel roll of cost of goods manifactured reduces by one times.
Embodiment
A kind of method of manufacture of alloy nodular cast iron roll of universal mill comprises melting, molten iron nodularization and inoculation, the casting roll; Cooling is unpacked, the pre-drilled cavity type, and this method adopts thermal treatment process behind the pre-drilled cavity type; After making roll through high temperature austeniteization and homogenizing; Through quick cooling, make the bottom land and the side matrix of fluting roll obtain refinement, satisfy the bottom land and the lateral wear resisting property of roll.Dark bottom land and roller surface apart from roller surface 180-220mm all are controlled to be troostitic structures; Apart from the dark bottom land of roller surface 180-220mm and the difference of hardness≤1.5HsD (SH) of roller surface.
Embodiment 1
Roll component need satisfy following requirement, ratio by weight:
C?3.1～3.3、Si?0.5～1、Mn?0.3～0.4、P<0.1、S<0.03、Cr?0.1～0.3、Ni?2.0～2.4、Mo?0.2～0.4；
The step of thermal treatment process is:
1) slowly heating before 200 ℃, temperature rise speed≤30 ℃/h were to 200-300 ℃ of insulation 10 hours;
2) slowly heat with the temperature rise speed of≤30 ℃/h again, be heated to 400-600 ℃ of insulation 10 hours;
3) slowly heat with the temperature rise speed of≤30 ℃/h again, be heated to 800-1000 ℃ of insulation 20 hours;
4) carry out quench treatment then, in 10 hours, be cooled to 300-400 ℃, be incubated 8 hours;
5) carry out temper again, be warming up to 450-650 ℃, be incubated 30 hours;
6) again with the cooling rate cooling of≤30 ℃/h, come out of the stove.
According to the method for manufacture of universal mill alloy ball iron BD2 roll of the present invention, carry out the difficult problem that heat-treating methods has successfully solved at the bottom of the deep opening type knurling and the side wears no resistance behind the universal mill alloy ball iron BD2 roll pre-drilled cavity type of employing uniqueness.The forged steel roll that can substitute original use is used for second of omnipotent production line cogging, and its roll doubles than former forged steel roll work-ing life, and the comparable forged steel roll of cost of goods manifactured reduces by one times.The universal mill BD2 roll of being invented can substitute forged steel roll fully and be used for second of omnipotent production line cogging.
Embodiment 2
Roll component need satisfy following requirement, ratio by weight:
C?3.3～3.6、Si?1.0～1.5、Mn?0.4～0.7、P<0.1、S<0.03、Cr?0.3～0.5、Ni?2.4～3.0、Mo?0.4～0.6；
The step of thermal treatment process is:
1) slowly heating before 200 ℃, temperature rise speed≤30 ℃/h were to 200-300 ℃ of insulation 8 hours;
2) slowly heat with the temperature rise speed of≤30 ℃/h again, be heated to 400-600 ℃ of insulation 8 hours;
3) slowly heat with the temperature rise speed of≤30 ℃/h again, be heated to 800-1000 ℃ of insulation 10 hours;
4) carry out quench treatment then, in 10 hours, be cooled to 300-400 ℃, be incubated 5 hours;
5) carry out temper again, be warming up to 450-650 ℃, be incubated 20 hours;
6) again with the cooling rate cooling of≤30 ℃/h, come out of the stove.
Embodiment 3
Roll component need satisfy following requirement, ratio by weight:
C?3.5～3.6、Si?0.5～1.0、Mn?0.3～0.5、P<0.1、S<0.03、Cr?0.1～0.3、Ni?2.6～3.0、Mo?0.5～0.6；
The step of described thermal treatment process is:
1) slowly heating before 200 ℃, temperature rise speed≤30 ℃/h were to 200-300 ℃ of insulation 12 hours;
2) slowly heat with the temperature rise speed of≤30 ℃/h again, be heated to 400-600 ℃ of insulation 12 hours;
3) slowly heat with the temperature rise speed of≤30 ℃/h again, be heated to 800-1000 ℃ of insulation 30 hours;
4) carry out quench treatment then, in 10 hours, be cooled to 300-400 ℃, be incubated 10 hours;
5) carry out temper again, be warming up to 450-650 ℃, be incubated 40 hours;
6) again with the cooling rate cooling of≤30 ℃/h, come out of the stove.
Claims (3)
1. the method for manufacture of an alloy nodular cast iron roll of universal mill is characterized in that, comprises melting, molten iron nodularization and inoculation; The casting roll, cooling is unpacked, the pre-drilled cavity type; This method adopts thermal treatment process behind the pre-drilled cavity type, make roll through after high temperature austeniteization and the homogenizing, through quick cooling; Make the bottom land and the side matrix of fluting roll obtain refinement, satisfy the bottom land and the lateral wear resisting property of roll;
Described roll component need satisfy following requirement, ratio by weight: C 3.1～3.6, Si 0.5～1.5, Mn0.3～0.7, P＜0.1, S＜0.03, Cr 0.1～0.5, Ni 2.0～3.0, Mo 0.20～0.60;
The step of described thermal treatment process is:
1) slowly heating before 200 ℃, temperature rise speed≤30 ℃/h were to 200-300 ℃ of insulation 8-12 hour;
2) slowly heat with the temperature rise speed of≤30 ℃/h again, be heated to 400-600 ℃ of insulation 8-12 hour;
3) slowly heat with the temperature rise speed of≤30 ℃/h again, be heated to 800-1000 ℃ of insulation 10-30 hour;
4) carry out quench treatment then, in 10 hours, be cooled to 300-400 ℃, be incubated 5-10 hour;
5) carry out temper again, be warming up to 450-650 ℃, be incubated 20-40 hour;
6) again with the cooling rate cooling of≤30 ℃/h, come out of the stove.
2. the method for manufacture of a kind of alloy nodular cast iron roll of universal mill according to claim 1 is characterized in that, all is controlled to be troostitic structures apart from dark bottom land and the roller surface of roller surface 180-220mm.
3. the method for manufacture of a kind of alloy nodular cast iron roll of universal mill according to claim 1 is characterized in that, apart from the dark bottom land of roller surface 180-220mm and the difference of hardness≤1.5HsD of roller surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100128546A CN101654734B (en) | 2008-08-20 | 2008-08-20 | Method for manufacturing alloy nodular cast iron roll of universal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008100128546A CN101654734B (en) | 2008-08-20 | 2008-08-20 | Method for manufacturing alloy nodular cast iron roll of universal mill |
Publications (2)
| Publication Number | Publication Date |
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| CN101654734A CN101654734A (en) | 2010-02-24 |
| CN101654734B true CN101654734B (en) | 2012-01-04 |
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| CN2008100128546A Active CN101654734B (en) | 2008-08-20 | 2008-08-20 | Method for manufacturing alloy nodular cast iron roll of universal mill |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103817277B (en) * | 2012-11-19 | 2015-08-19 | 上海重型机器厂有限公司 | The boiler-steam dome manufacture method of 13MnNiMo5-4 cylinder forgings |
| CN106702114A (en) * | 2016-12-29 | 2017-05-24 | 大连冶金工具厂有限公司 | Production process of alloy cast steel roller |
| CN109593944B (en) * | 2018-12-07 | 2020-05-19 | 鞍钢铸钢有限公司 | Heat treatment process for casting roller |
| CN111139401A (en) * | 2019-12-26 | 2020-05-12 | 中钢集团邢台机械轧辊有限公司 | High-alloy forged steel BD roll and manufacturing method thereof |
| CN111926239A (en) * | 2020-10-16 | 2020-11-13 | 常州凯达重工科技有限公司 | High-strength high-hardness troostite ductile iron section steel roll and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051763A (en) * | 1990-02-15 | 1991-05-29 | 佳木斯工学院 | Anti-wear, high toughness cast iron |
| CN1068599A (en) * | 1991-06-28 | 1993-02-03 | 招远县黄金机械总厂 | A kind of wearable ductile iron |
| CN101177759A (en) * | 2007-12-04 | 2008-05-14 | 北京工业大学 | Centrifugal composite modified indefinite chilled cast iron roller and preparation method thereof |
-
2008
- 2008-08-20 CN CN2008100128546A patent/CN101654734B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051763A (en) * | 1990-02-15 | 1991-05-29 | 佳木斯工学院 | Anti-wear, high toughness cast iron |
| CN1068599A (en) * | 1991-06-28 | 1993-02-03 | 招远县黄金机械总厂 | A kind of wearable ductile iron |
| CN101177759A (en) * | 2007-12-04 | 2008-05-14 | 北京工业大学 | Centrifugal composite modified indefinite chilled cast iron roller and preparation method thereof |
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| CN101654734A (en) | 2010-02-24 |
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Effective date of registration: 20171221 Address after: 114021 Tiexi District, Liaoning City, Anshan Iron and steel plant Patentee after: Anshan Iron Roll Co., Ltd. Address before: 114003 Anshan City, Liaoning Province Mountain Red Road No. 28 Patentee before: Angang Heavy Machinery Co., Ltd. |
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