CN103302250B - Edging roll mould and process for producing edging roll by adopting edging roll mould - Google Patents
Edging roll mould and process for producing edging roll by adopting edging roll mould Download PDFInfo
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- CN103302250B CN103302250B CN201310258085.9A CN201310258085A CN103302250B CN 103302250 B CN103302250 B CN 103302250B CN 201310258085 A CN201310258085 A CN 201310258085A CN 103302250 B CN103302250 B CN 103302250B
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Abstract
The invention discloses an edging roll mould and a process for producing an edging roll by adopting the edging roll mould. The edging roll mould comprises a bottom box, a cold type, an upper roll neck sand box and a casting head sand box which are sequentially arranged from bottom to top, wherein the upper end of the bottom box is opened, and the lower end of the bottom box is sealed; the cold type, the upper roll neck sand box and the upper and lower ends of casting head sand box are opened, and an inner cavity of the bottom box is corresponding to a tenuous shaft neck end of the edging roll. According to the edging roll mould provided by the invention, the tenuous shaft neck part of the edging roll can be designed on the lower part of the mould, 10% of molten steel is saved, the tenuous shaft neck part can obtain fine grained structure, a loosen and coarseness phenomenon is eliminated, the yield is improved, and the manufacturing cost is saved; meanwhile, the scrap rate of the tenuous shaft neck part is reduced, the efficiency is improved, and the energy saving and environmental protection are realized.
Description
Technical field
The present invention relates to a kind of edger roll mould and adopt this mould to produce the technique of edger roll.
Background technology
The machine maintenance of 1250mm-2300mm tropical rolling is just being shaped and the edger roll controlling highly frame use wide with H profile steel control leg controlling width frame and uses; because roll forming is special; barrel diameter is large; roll neck is elongated, by existing mold, the design of roll neck elongated portion is produced at mould upstream; due to technological design coefficient large (70-80% of roller diameter φ); high-temperature molten steel contracting is large, roll neck elongated portion often can be caused to organize coarse and loose causing to scrap, lose very large.
Edger roll need have high intensity, wearability and heat crack resistance and just can increase the service life, and reaches energy-saving and cost-reducing effect.
Because edger roll is used in the front and rear of roughing mills, operate under the high temperature of degree more than 1000 for a long time, the edger roll material that producer uses is by forged steel-SGV-AD140I/160I half steel, because of the change of steel quality, the edger roll of above-mentioned material can not meet the demand of production, there is familiar lacunas in various degree simultaneously: the edger roll of forged steel material due to carbon (C) constituent content low, wearability, heat crack resistance are poor, easy be full of cracks, amount of rolling is low, and cost is high; The edger roll of middle Ni-Cr-Mo spheroidal graphite (SGV) material, wearability strengthens, intensity difference (≤320MPa), roll breakage neck accident when easily causing operation; AD140I/160I material edger roll, amount of rolling 30000-40000 ton of being everlasting is hovered.For this reason, the edger roll that can improve the New Type Material of longer service life is badly in need of in steel rolling producer.
Summary of the invention
First technical problem to be solved by this invention is to provide the high edger roll mould of a kind of yield rate, saves production cost.
In order to solve the problems of the technologies described above, technical scheme provided by the present invention is: edger roll mould, comprises the under casing, cold mould, upper roll neck sandbox and the rising head sandbox that set gradually from bottom to up; The upper end of described under casing is uncovered, lower end closed; The two ends up and down of described cold mould, upper roll neck sandbox and rising head sandbox are uncovered; The inner chamber of described under casing is corresponding with the roll neck elongated end of edger roll.
Second technical problem to be solved by this invention is to provide a kind of technique of producing edger roll, and obtained edger roll has high intensity, wearability and heat crack resistance, long service life.
In order to solve the problems of the technologies described above, technical scheme provided by the present invention is: the technique of producing edger roll, adopts the edger roll mould in preceding solution, comprises the following steps:
1. add yttrium-base heavy rare earth alterant during liquid steel refining, eliminate oxygen, hydrogen, sulphur, phosphorus harmful element in molten steel, obtain the high-quality molten steel that carbon, manganese, chromium, nickel content are respectively 1.45% ~ 1.55%;
2. heat 40-60 DEG C on the basis of liquidus temperature, then after calm 8 minutes, pour into a mould edger roll blank in edger roll mould;
3. successively through diffusion, spheroidizing, normalizing Acm+60 ~ 80 DEG C and tempering 450 ~ 580 DEG C of PROCESS FOR TREATMENT;
4. qualified finished product edger roll is obtained after chips.
Described step 1. in liquid steel refining time add yttrium-base heavy rare earth alterant amount be: molten steel per ton adds 1-3 kilogram of yttrium-base heavy rare earth alterant.
After have employed technique scheme, the present invention has following beneficial effect: the inner chamber of the under casing of (1) edger roll of the present invention mould is corresponding with the roll neck elongated end of edger roll, thus by the design of the elongated roller neck portion of edger roll in mould bottom, the molten steel of 10% can be saved, fine grain structure is obtained at elongated roller neck portion, eliminate loose and coarse phenomenon, improve yield rate, save production cost; Meanwhile, reduce the scrap rate of elongated roller neck portion, both improve efficiency, again energy-conserving and environment-protective.
(2) technique of production edger roll of the present invention adds yttrium-base heavy rare earth alterant when liquid steel refining, eliminate oxygen, hydrogen, sulphur, the phosphorus harmful element in molten steel, obtain the high-quality molten steel that carbon, manganese, chromium, nickel content are respectively 1.45% ~ 1.55%, can make the quenching degree of edger roll and red hardness better.
(3) technique of production edger roll of the present invention is to edger roll blank successively through diffusion, spheroidizing, normalizing Acm+60 ~ 80 DEG C and tempering 450 ~ 580 DEG C of PROCESS FOR TREATMENT, and the body of roll of edger roll and roll neck can be made to have uniform hardness.
(4) edger roll that the technique of production edger roll of the present invention is obtained, detecting matrix through metallographic is bainite+tempered sorbite+pearlite, roll neck Kang La Qiang Du≤650MPa, and the 2-3 reaching common roll service life doubly, once can produce 12.5 ten thousand tons.
Accompanying drawing explanation
In order to make content of the present invention more easily be clearly understood, below according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of edger roll mould of the present invention.
Label in accompanying drawing is:
Under casing 1, cold mould 2, upper roll neck sandbox 3, rising head sandbox 4, edger roll blank 5, finished product edger roll 6.
Detailed description of the invention
(embodiment 1)
See Fig. 1, the edger roll mould of the present embodiment, comprise the under casing 1, cold mould 2, upper roll neck sandbox 3 and the rising head sandbox 4 that set gradually from bottom to up.
The upper end of under casing 1 is uncovered, lower end closed.The two ends up and down of cold mould 2, upper roll neck sandbox 3 and rising head sandbox 4 are uncovered.The inner chamber of under casing 1 is corresponding with the roll neck elongated end of edger roll.
Adopt the edger roll mould of the present embodiment to produce the technique of edger roll, comprise the following steps:
1. during liquid steel refining, molten steel per ton adds 1-3 kilogram of yttrium-base heavy rare earth alterant, eliminate oxygen, hydrogen, sulphur, the phosphorus harmful element in molten steel, obtain the high-quality molten steel that carbon, manganese, chromium, nickel content are respectively 1.45% ~ 1.55%, make the quenching degree of edger roll and red hardness better.
2. heat 40-60 DEG C on the basis of liquidus temperature, then after calm 8 minutes, pour into a mould edger roll blank 5 in edger roll mould.
3. successively through diffusion, spheroidizing, normalizing Acm+60 ~ 80 DEG C and tempering 450 ~ 580 DEG C of PROCESS FOR TREATMENT, the body of roll of edger roll and roll neck is made to have uniform hardness.
4. qualified finished product edger roll 6 is obtained after chips.
Through the edger roll that above-mentioned technique is obtained, detecting matrix through metallographic is bainite+tempered sorbite+pearlite.Roll neck Kang La Qiang Du≤650MPa, the 2-3 reaching common roll service life doubly, once can produce 12.5 ten thousand tons.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. produce the technique of edger roll, it is characterized in that: comprise the following steps:
1. add yttrium-base heavy rare earth alterant during liquid steel refining, eliminate oxygen, hydrogen, sulphur, phosphorus harmful element in molten steel, obtain the high-quality molten steel that carbon, manganese, chromium, nickel content are respectively 1.45% ~ 1.55%;
2. heat 40-60 DEG C on the basis of liquidus temperature, then after calm 8 minutes, pour into a mould edger roll blank (5) in edger roll mould;
3. successively through diffusion, spheroidizing, normalizing Acm+60 ~ 80 DEG C and tempering 450 ~ 580 DEG C of PROCESS FOR TREATMENT;
4. qualified finished product edger roll (6) is obtained after chips.
2. the technique of production edger roll according to claim 1, is characterized in that: described step 1. in liquid steel refining time add yttrium-base heavy rare earth alterant amount be: molten steel per ton adds 1-3 kilogram of yttrium-base heavy rare earth alterant.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310258085.9A CN103302250B (en) | 2013-06-25 | 2013-06-25 | Edging roll mould and process for producing edging roll by adopting edging roll mould |
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| CN201310258085.9A CN103302250B (en) | 2013-06-25 | 2013-06-25 | Edging roll mould and process for producing edging roll by adopting edging roll mould |
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| CN103302250A CN103302250A (en) | 2013-09-18 |
| CN103302250B true CN103302250B (en) | 2015-07-01 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108144965A (en) * | 2018-01-04 | 2018-06-12 | 湖州中杭轧辊有限公司 | A kind of roll and production technology suitable for cross-wedge-rolling shaft part |
| CN108118247A (en) * | 2018-01-04 | 2018-06-05 | 湖州中杭轧辊有限公司 | A kind of alloy half steel roll for being exclusively used in rolling bearings steel ball and its production technology |
| CN111922293A (en) * | 2020-10-12 | 2020-11-13 | 常州凯达重工科技有限公司 | Casting mold for roller with mud core seat and mud core falling method for roller |
Citations (7)
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| SU1042874A1 (en) * | 1982-02-26 | 1983-09-23 | Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт Им.Л.И.Брежнева | Mould for castning rolls |
| JPS63224839A (en) * | 1987-03-16 | 1988-09-19 | Kawasaki Steel Corp | Mold for casting steel kind roll for rolling mill |
| KR100894211B1 (en) * | 2007-11-08 | 2009-04-22 | 현대제철 주식회사 | Hot rolling roll mold |
| CN201543778U (en) * | 2009-11-24 | 2010-08-11 | 铜陵市大明玛钢有限责任公司 | Anti-cracking roller casting die |
| CN202079256U (en) * | 2011-05-23 | 2011-12-21 | 张年生 | Injection-type pouring system on cast steel rolling roll |
| CN102554129A (en) * | 2011-12-26 | 2012-07-11 | 常州凯达重工科技有限公司 | Roll casting process and pouring device adopted by same |
| CN203380333U (en) * | 2013-06-25 | 2014-01-08 | 常州凯达重工科技有限公司 | Edging roller die |
-
2013
- 2013-06-25 CN CN201310258085.9A patent/CN103302250B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1042874A1 (en) * | 1982-02-26 | 1983-09-23 | Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт Им.Л.И.Брежнева | Mould for castning rolls |
| JPS63224839A (en) * | 1987-03-16 | 1988-09-19 | Kawasaki Steel Corp | Mold for casting steel kind roll for rolling mill |
| KR100894211B1 (en) * | 2007-11-08 | 2009-04-22 | 현대제철 주식회사 | Hot rolling roll mold |
| CN201543778U (en) * | 2009-11-24 | 2010-08-11 | 铜陵市大明玛钢有限责任公司 | Anti-cracking roller casting die |
| CN202079256U (en) * | 2011-05-23 | 2011-12-21 | 张年生 | Injection-type pouring system on cast steel rolling roll |
| CN102554129A (en) * | 2011-12-26 | 2012-07-11 | 常州凯达重工科技有限公司 | Roll casting process and pouring device adopted by same |
| CN203380333U (en) * | 2013-06-25 | 2014-01-08 | 常州凯达重工科技有限公司 | Edging roller die |
Non-Patent Citations (2)
| Title |
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| 钇基重稀土复合球化剂试验研究;胡学军等;《铸造》;20010722;第50卷(第07期);第380-384页 * |
| 铸造半钢轧辊的研制;王贵明等;《钢铁》;19840531;第19卷(第05期);第29-36页 * |
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Address after: No.66, Dong'an Xingwang Road, Huangli Town, Wujin District, Changzhou City, Jiangsu Province 213100 Patentee after: Jiangsu Kaida Heavy Industry Co.,Ltd. Address before: No. 66, Xingwang Road, Dong'an, Huangli Town, Changzhou City, Jiangsu Province 213000 Patentee before: CHANGZHOU KAIDA HEAVY INDUSTRY TECHNOLOGY CO.,LTD. |
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