CN105945186A - High-carbon and high-chromium cold roll forging technology adopting diffusion during forging - Google Patents
High-carbon and high-chromium cold roll forging technology adopting diffusion during forging Download PDFInfo
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- CN105945186A CN105945186A CN201610315205.8A CN201610315205A CN105945186A CN 105945186 A CN105945186 A CN 105945186A CN 201610315205 A CN201610315205 A CN 201610315205A CN 105945186 A CN105945186 A CN 105945186A
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- forging
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- cold roll
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/02—Making machine elements balls, rolls, or rollers, e.g. for bearings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a high-carbon and high-chromium cold roll forging technology adopting diffusion during forging. The technology is characterized by comprising the following steps that firstly, a steel ingot is heated to the forging temperature ranging from 1,130 DEG C to 1,180 DEG C according to the normal step, and heat preservation is conducted for 5 h; secondly, after two times of upsetting treatment and two times of drawing treatment are conducted on the steel ingot, high-temperature diffusion treatment is conducted, and heat preservation is conducted for 10-20 h within the temperature ranging from 1,130 DEG C to 1,180 DEG C; thirdly, drawing out is conducted to the size required by the technology; and fourthly, after forging, normalizing, balling and hydrogen diffusion treatment is conducted, and then later procedures are conducted. Compared with a traditional high-carbon and high-chromium cold roll forging technology adopting diffusion before forging, the diffusion time for diffusion during forging is shortened by 10-20 h compared with the diffusion time for diffusion before forging within the range from 1,130 DEG C to 1,180 DEG C, energy consumption is reduced, the production cost is reduced, the production period is shortened, and economic benefits and social benefits are improved.
Description
Technical field
The present invention relates to the improvement of a kind of high carbon and chromium cold roll forging process, belong to technical field of forging, a kind of high carbon and chromium cold roll forging process using in forging diffusion.
Background technology
Cold roll is very important workpiece on production line of rolling mill, due to the work under bad environment of cold roll, uses cold roll and requires the highest, and therefore it must have good wearability, high rigid.For meeting these particular/special requirements of cold roll, produce at present and above use Cr3, Cr5 material to make cold roll more, also have and use Cr7, Cr8.These material carbon contents, chromium content are higher, the quenching degree making cold roll is strong, wearability is high, service life is long, but its alloying level is the highest, and the segregation degree of material can increase, porousness also can increase, therefore typically using high purity on producing, component segregation is little, twin furnace smelting+electric slag refusion ingot that porousness is low.As a example by 600 millimeters of ESR ingots of diameter, this high carbon and chromium cold roll forging process is as follows: the first step: after steel ingot shove charge, it is heated to 1130 DEG C 1180 DEG C through ladder, heating curves such as Fig. 1, carry out High temperature diffusion to improve the component segregation of steel ingot, determine that diffusion time is 25 hours by steel ingot diameter and chemical composition；Second step: steel ingot, through jumping-up, is forged to process after pulling out twice；3rd step: after carrying out normalizing+nodularization+expansion hydrogen process after forging, carry out subsequent handling.It is disadvantageous in that: this high carbon and chromium cold roll forging process, and heat time heating time is long, and production cost is high, and the production cycle is long.
Summary of the invention
It is an object of the invention to provide a kind of high carbon and chromium cold roll forging process using and spreading in forging, it processes High temperature diffusion before forging and changes the middle DIFFUSION TREATMENT of forging process into, and blank cross section now is little, shortens High temperature diffusion temperature retention time, shortens the production cycle.
In order to reach object above, the technical solution adopted in the present invention is: this is a kind of uses the high carbon and chromium cold roll forging process of diffusion in forging, it is characterised in that: it has comprised the following steps:
Step (1): steel ingot is heated to forging temperature 1130 DEG C 1180 DEG C by normal ladder, is incubated 5 hours；
Step (2): steel ingot pulls out process through two upsettings two: first carrying out jumping-up for the first time, its forging ratio is 2；Carrying out pulling out for the first time, pulling ratio is 2 again；Carrying out second time jumping-up again, its forging ratio is 2；Finally carry out second time to pull out, stay forging ratio 1.6 2；Two upsettings two are pulled out and are carried out High temperature diffusion process after process completes, and 1130 DEG C of 1180 DEG C of inside holding of temperature 10 20 hours, concrete temperature retention time determines according to chemical composition and blank size；
Step (3): pull out the size to technological requirement；
Step (4): carry out normalizing+nodularization+expansion hydrogen after forging and process, then carry out subsequent handling.
The beneficial effects of the present invention is: compared with the high carbon and chromium cold roll forging process of diffusion before traditional forging, diffusion time in the range of 1,130 1180 DEG C, in forging, before diffusion ratio forging, the diffusion time of diffusion shortens 10 20 hours, reduce energy consumption, reduce production cost, shorten the production cycle, improve economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is the steel ingot ladder heating curves schematic diagram of the present invention.
Detailed description of the invention
Embodiment:
As a example by 600 millimeters of ESR ingots of diameter, heating curves as shown in Figure 1 carries out heat treated.This is a kind of uses the high carbon and chromium cold roll forging process of diffusion in forging, it is characterised in that: it has comprised the following steps:
Step (1): steel ingot is heated to forging temperature 1130 DEG C 1180 DEG C by normal ladder, is incubated 5 hours；
Step (2): steel ingot pulls out process through two upsettings two: first carrying out jumping-up for the first time, its forging ratio is 2；Carrying out pulling out for the first time, pulling ratio is 2 again；Carrying out second time jumping-up again, its forging ratio is 2；Finally carry out second time to pull out, stay forging ratio 1.6 2；Two upsettings two are pulled out and are carried out High temperature diffusion process after process completes, and 1130 DEG C of 1180 DEG C of inside holding of temperature 10 20 hours, concrete temperature retention time determines according to chemical composition and blank size；
Step (3): pull out the size to technological requirement；
Step (4): carry out normalizing+nodularization+expansion hydrogen after forging and process, then carry out subsequent handling.
After testing, Aliquation carbide is less than 2 grades to forging, meets GB/T18254-2002 standard, meets customer requirement.
The operation principle of the present invention is: after the pulling of steel ingot jumping-up, the original thick as cast condition arborescent structure of steel ingot has crushed, the eutectic carbon compound formed including the element such as carbon and chrome molybdenum, these compound blocks are big, and arrange chaining or heap becomes band and cellular segregttion, after forging, become carbide in small, broken bits, after the high temperature long period is incubated, carbide quickly dissolves, form the most tiny compound disperses to be distributed in the base, and blank reduces than steel ingot sectional area, diffusion time used, (fixed according to chemical composition and blank size) was 10 20 hours, eliminate the forging stress of blank, structural stress, the units such as carbon chromium are made to have the time diffusion of abundance, improve component segregation, reach the purpose that homogenizes.As a example by 600 millimeters of ESR ingots of diameter, in traditional handicraft, temperature retention time is 25 hours, and by technique of the present invention, temperature retention time has altogether 15 hours, highly shortened temperature retention time, and effect is obvious.Present invention process is reasonable, workable, it is simple to tissue produces, and with short production cycle, energy consumption is low, steady quality, and economic benefit and social benefit are notable.
Claims (1)
1. this kind of high carbon and chromium cold roll forging process using in forging diffusion, it is characterised in that: it has comprised the following steps:
Step (1): steel ingot is heated to forging temperature 1130 DEG C 1180 DEG C by normal ladder, is incubated 5 hours；
Step (2): steel ingot pulls out process through two upsettings two: first carrying out jumping-up for the first time, its forging ratio is 2；Carrying out pulling out for the first time, pulling ratio is 2 again；Carrying out second time jumping-up again, its forging ratio is 2；Finally carry out second time to pull out, stay forging ratio 1.6 2；Two upsettings two are pulled out and are carried out High temperature diffusion process after process completes, 1130 DEG C of 1180 DEG C of inside holding of temperature 10 20 hours；
Step (3): pull out the size to technological requirement；
Step (4): carry out normalizing+nodularization+expansion hydrogen after forging and process, then carry out subsequent handling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610315205.8A CN105945186A (en) | 2016-05-14 | 2016-05-14 | High-carbon and high-chromium cold roll forging technology adopting diffusion during forging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610315205.8A CN105945186A (en) | 2016-05-14 | 2016-05-14 | High-carbon and high-chromium cold roll forging technology adopting diffusion during forging |
Publications (1)
| Publication Number | Publication Date |
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| CN105945186A true CN105945186A (en) | 2016-09-21 |
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| CN201610315205.8A Pending CN105945186A (en) | 2016-05-14 | 2016-05-14 | High-carbon and high-chromium cold roll forging technology adopting diffusion during forging |
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| CN (1) | CN105945186A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109047600A (en) * | 2018-09-20 | 2018-12-21 | 成都先进金属材料产业技术研究院有限公司 | The forging method of cold rolling roller stock |
| CN111790863A (en) * | 2020-06-22 | 2020-10-20 | 宜兴市鑫源辊业有限公司 | Forging method for inhibiting strip-shaped carbide of cold-rolled roller blank |
Citations (6)
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| JPH09242763A (en) * | 1996-03-12 | 1997-09-16 | Nippon Seiko Kk | Manufacture of rolling bearing |
| CN1727502A (en) * | 2004-07-29 | 2006-02-01 | 山东泰山钢铁有限公司 | Crl2MoV steel forging method |
| CN102400048A (en) * | 2010-09-15 | 2012-04-04 | 宝山钢铁股份有限公司 | Cold work roll steel for high-strength steel rolling, cold work roll and its manufacturing method |
| CN102528382A (en) * | 2010-12-10 | 2012-07-04 | 上海重型机器厂有限公司 | Manufacture method of cold-rolled roller |
| CN102581186A (en) * | 2012-02-15 | 2012-07-18 | 德谦杭重锻造有限公司 | Method for controlling internal defect of large forging |
| CN103088199A (en) * | 2011-11-04 | 2013-05-08 | 上海重型机器厂有限公司 | Heat treatment method after forging for forged steel bearing roller used for large heavy plate mill |
-
2016
- 2016-05-14 CN CN201610315205.8A patent/CN105945186A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09242763A (en) * | 1996-03-12 | 1997-09-16 | Nippon Seiko Kk | Manufacture of rolling bearing |
| CN1727502A (en) * | 2004-07-29 | 2006-02-01 | 山东泰山钢铁有限公司 | Crl2MoV steel forging method |
| CN102400048A (en) * | 2010-09-15 | 2012-04-04 | 宝山钢铁股份有限公司 | Cold work roll steel for high-strength steel rolling, cold work roll and its manufacturing method |
| CN102528382A (en) * | 2010-12-10 | 2012-07-04 | 上海重型机器厂有限公司 | Manufacture method of cold-rolled roller |
| CN103088199A (en) * | 2011-11-04 | 2013-05-08 | 上海重型机器厂有限公司 | Heat treatment method after forging for forged steel bearing roller used for large heavy plate mill |
| CN102581186A (en) * | 2012-02-15 | 2012-07-18 | 德谦杭重锻造有限公司 | Method for controlling internal defect of large forging |
Non-Patent Citations (1)
| Title |
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| 李朝华等: ""MC5冷轧辊辊坯工艺改进研究"", 《大型铸锻件》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109047600A (en) * | 2018-09-20 | 2018-12-21 | 成都先进金属材料产业技术研究院有限公司 | The forging method of cold rolling roller stock |
| CN109047600B (en) * | 2018-09-20 | 2020-04-07 | 成都先进金属材料产业技术研究院有限公司 | Forging method of cold-rolled roller blank |
| CN111790863A (en) * | 2020-06-22 | 2020-10-20 | 宜兴市鑫源辊业有限公司 | Forging method for inhibiting strip-shaped carbide of cold-rolled roller blank |
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