CN104152641A - Carrier roller heat treatment technology - Google Patents
Carrier roller heat treatment technology Download PDFInfo
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- CN104152641A CN104152641A CN201410402751.6A CN201410402751A CN104152641A CN 104152641 A CN104152641 A CN 104152641A CN 201410402751 A CN201410402751 A CN 201410402751A CN 104152641 A CN104152641 A CN 104152641A
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Abstract
The invention discloses a carrier roller heat treatment technology. The carrier roller heat treatment technology comprises a quenching treatment step and a tempering step. According to the quenching treatment step, preheating, heat preservation and shock cooling working procedures are sequentially carried out on a forming carrier roller with billet materials of 40 Cr, and the water cooling and air cooling interphase circulating cooling mode is adopted by shock cooling; according to the preheating step, the carrier roller is heated to 630 DEG C to 650 DEG C, and heat preservation is carried out on the carrier roller for five or more hours; according to the heat preservation step, the heat carrier roller obtained in the preheating step is moved into a heating furnace with the temperature higher than 870 DEG C to be heated to 840 DEG C to 870 DEG C, and heat preservation is carried out on the heat carrier roller for two or more hours. The process route is simple, the shock cooling mode that water cooling and air cooling are alternatively carried out is adopted, and under the condition that the heat treatment quality target is achieved, an existing adopted oil quenching shock cooling mode is replaced. Due to changes of the process, the quenching cost is saved, meanwhile, the dependency on oil quenching agents is reduced, and due to implementation of the process, environmental protection is benefited.
Description
Technical field
The present invention relates to mixing machine barrel device support component manufacturing process field, particularly relate to a kind of carrying roller thermal treatment process.
Background technology
Support roller device is the support component of mixing machine barrel device, bear the weight of material in whole barrel device and cylindrical shell and barrel device, material moving load in the course of the work, above-mentioned load is mainly stress and frictional force, and this just requires carrying roller need have certain intensity, hardness and wear resistance.The quality of existing large-scale mixer upper supporting roller has surpassed 10T, on a mixing machine, generally at opening for feed and discharge port place, be respectively provided with a carrying roller, the workmanship of carrying roller, by directly having influence on the stressed of each positions such as blocking roll of mixing machine, cylindrical shell and rolling ring, directly affects the even normal work of mixing machine in work-ing life of above-mentioned parts.
In prior art, because oil quenching speed of cooling is slow, for preventing forming larger internal stress on carrying roller surface, carrying roller generally adopts the quenching form of oil quenching.Yet after being heated for the quenching oil of oil quenching, will produce a large amount of oil smoke, the discarded or manipulation of regeneration of weigh in carrying roller oil quenching hundred tons or above quenching oil is also for the heat treated cost of carrying roller and environment protection bring many drawbacks.
Summary of the invention
After being heated for the above-mentioned quenching oil for oil quenching, a large amount of oil smoke will be produced; discarded or the manipulation of regeneration of hundred tons or above quenching oil of weighing in carrying roller oil quenching is also brought the problem of many drawbacks for the heat treated cost of carrying roller and environment protection, the invention provides a kind of carrying roller thermal treatment process.
For the problems referred to above, carrying roller thermal treatment process provided by the invention reaches goal of the invention by following technical essential: carrying roller thermal treatment process, comprise quench treatment step and tempering step, preheating, insulation and quenching operation that the moulding carrying roller that it is 40Cr by blank material that described quenching step comprises sequentially carries out, described quenching is the water-cooled circulating cooling mode alternate with air cooling;
Described pre-heating step is no less than 5h for carrying roller is heated to 630-650 ℃ of insulation;
Described incubation step is no less than 2h for the hot carrying roller that above-mentioned pre-heating step is obtained moves into furnace temperature higher than being heated to 840-870 ℃ of insulation in the process furnace of 870 ℃.
Concrete, the preheating of setting and insulation operation are two and are mutually connected operation closely, adopt furnace temperature higher than the setting of the carrying roller Heating temperature upper limit, can avoid the surperficial situation that severe oxidation decarburization, coarse grains and easily embrittlement occur of carrying roller that thickness is larger to occur; Adopt first preheating in insulation operation, to be rapidly heated to the technological design of upper temperature limit, because preheating temperature ceiling temperature is low, temperature rise faster after entering process furnace, can make the surface oxidation decarbonization degree of carrying roller low so again; Adopt the step design of quench step water-cooled and air cooling circulation, in Cooling Process due to steam environmentally safe, the feature of being simultaneously convenient to draw materials can make carrying roller can submerge completely among water coolant, faster with the speed of cooling of surface uniform when making carrying roller obtain surperficial cold kingfisher, also can access uniform Hardness Distribution, follow-up air cooling step has reduced the speed of cooling of carrying roller, can effectively prevent that the situation of hardening crack from occurring.
Further technical scheme is:
The size of the surface hardness obtaining for balanced quenching and the quenching stress of accumulation, make the stable 50HRC left and right that remains on of surface hardness of carrying roller, and quenching stress is not enough to make produce on carrying roller quenching crack, in described quenching operation, the temperature of each water-cooled work step carrying roller is reduced to any number within the scope of 60-80 ℃, any number of the temperature of each air cooling operation carrying roller between reducing within the scope of 15-30 ℃.Further, for obtaining desirable tempering effect, the tempering temperature of described tempering is any number within the scope of 580-620 ℃.
The present invention has following beneficial effect:
Above operational path is simple; by the quenching mode that adopts water-cooled and air cooling to hocket; in the situation that reaching thermal treatment quality target; substituted the oil quenching quenching mode of existing employing; quenching cost has not only been saved in the change of above technique; reduced the dependence to oils quenching medium, i.e. the realization of above technique also helps protection of the environment simultaneously.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but structure of the present invention is not limited only to following examples.
Embodiment 1:
Carrying roller thermal treatment process, comprises quench treatment step and tempering step, preheating, insulation and quenching operation that the moulding carrying roller that it is 40Cr by blank material that described quenching step comprises sequentially carries out, and described quenching is the water-cooled circulating cooling mode alternate with air cooling;
Described pre-heating step is no less than 5h for carrying roller is heated to 630-650 ℃ of insulation;
Described incubation step is no less than 2h for the hot carrying roller that above-mentioned pre-heating step is obtained moves into furnace temperature higher than being heated to 840-870 ℃ of insulation in the process furnace of 870 ℃.
Concrete, the preheating of setting and insulation operation are two and are mutually connected operation closely, adopt furnace temperature higher than the setting of the carrying roller Heating temperature upper limit, can avoid the surperficial situation that severe oxidation decarburization, coarse grains and easily embrittlement occur of carrying roller that thickness is larger to occur; Adopt first preheating in insulation operation, to be rapidly heated to the technological design of upper temperature limit, because preheating temperature ceiling temperature is low, temperature rise faster after entering process furnace, can make the surface oxidation decarbonization degree of carrying roller low so again; Adopt the step design of quench step water-cooled and air cooling circulation, in Cooling Process due to steam environmentally safe, the feature of being simultaneously convenient to draw materials can make carrying roller can submerge completely among water coolant, faster with the speed of cooling of surface uniform when making carrying roller obtain surperficial cold kingfisher, also can access uniform Hardness Distribution, follow-up air cooling step has reduced the speed of cooling of carrying roller, can effectively prevent that the situation of hardening crack from occurring.
Embodiment 2:
The present embodiment is further qualified on the basis of embodiment 1: further technical scheme is: the size of the surface hardness obtaining for balanced quenching and the quenching stress of accumulation, make the stable 50HRC left and right that remains on of surface hardness of carrying roller, and quenching stress is not enough to make produce on carrying roller quenching crack, in described quenching operation, the temperature of each water-cooled work step carrying roller is reduced to any number within the scope of 60-80 ℃, any number of the temperature of each air cooling operation carrying roller between reducing within the scope of 15-30 ℃.Further, for obtaining desirable tempering effect, the tempering temperature of described tempering is any number within the scope of 580-620 ℃.
Above content is the further description of the present invention being done in conjunction with concrete preferred implementation, can not assert that the specific embodiment of the present invention is confined to these explanations.For general technical staff of the technical field of the invention, not departing from other embodiments that draw under technical scheme of the present invention, all should be included in protection scope of the present invention.
Claims (3)
1. carrying roller thermal treatment process, comprise quench treatment step and tempering step, it is characterized in that, preheating, insulation and quenching operation that the moulding carrying roller that it is 40Cr by blank material that described quenching step comprises sequentially carries out, described quenching is the water-cooled circulating cooling mode alternate with air cooling;
Described pre-heating step is no less than 5h for carrying roller is heated to 630-650 ℃ of insulation;
Described incubation step is no less than 2h for the hot carrying roller that above-mentioned pre-heating step is obtained moves into furnace temperature higher than being heated to 840-870 ℃ of insulation in the process furnace of 870 ℃.
2. carrying roller thermal treatment process according to claim 1, it is characterized in that, in described quenching operation, the temperature of each water-cooled work step carrying roller is reduced to any number within the scope of 60-80 ℃, any number of the temperature of each air cooling operation carrying roller between reducing within the scope of 15-30 ℃.
3. carrying roller thermal treatment process according to claim 1, is characterized in that, the tempering temperature of described tempering is any number within the scope of 580-620 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410402751.6A CN104152641A (en) | 2014-08-17 | 2014-08-17 | Carrier roller heat treatment technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410402751.6A CN104152641A (en) | 2014-08-17 | 2014-08-17 | Carrier roller heat treatment technology |
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| CN104152641A true CN104152641A (en) | 2014-11-19 |
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| CN201410402751.6A Pending CN104152641A (en) | 2014-08-17 | 2014-08-17 | Carrier roller heat treatment technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177228A (en) * | 2015-07-23 | 2015-12-23 | 柳州市众力金铭热处理有限公司 | 40Cr steel rod quenching method for quartz sand rod mill |
| CN114574671A (en) * | 2022-03-14 | 2022-06-03 | 河南精诚汽车零部件有限公司 | Quantitative speed-control heat treatment process for roller skin of ball press |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2203968C2 (en) * | 2001-05-30 | 2003-05-10 | ОАО "Нижнетагильский металлургический комбинат" | Method of manufacture of bandages from hypereutectoid steels |
| CN101363070A (en) * | 2007-08-07 | 2009-02-11 | 上海重型机器厂有限公司 | Water quenching and air cooling modified treatment technology of 42CrMo material |
| CN102268601A (en) * | 2011-08-09 | 2011-12-07 | 上海捷如重工机电设备有限公司 | 50Cr3MoV steel for back-up roll and heat treatment method for steel |
| CN102925656A (en) * | 2012-11-22 | 2013-02-13 | 宝钢集团常州轧辊制造公司 | Preheating treatment method for supporting roller |
| JP5443843B2 (en) * | 2009-06-17 | 2014-03-19 | 株式会社神戸製鋼所 | Method for producing forged steel roll for cold rolling |
-
2014
- 2014-08-17 CN CN201410402751.6A patent/CN104152641A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2203968C2 (en) * | 2001-05-30 | 2003-05-10 | ОАО "Нижнетагильский металлургический комбинат" | Method of manufacture of bandages from hypereutectoid steels |
| CN101363070A (en) * | 2007-08-07 | 2009-02-11 | 上海重型机器厂有限公司 | Water quenching and air cooling modified treatment technology of 42CrMo material |
| JP5443843B2 (en) * | 2009-06-17 | 2014-03-19 | 株式会社神戸製鋼所 | Method for producing forged steel roll for cold rolling |
| CN102268601A (en) * | 2011-08-09 | 2011-12-07 | 上海捷如重工机电设备有限公司 | 50Cr3MoV steel for back-up roll and heat treatment method for steel |
| CN102925656A (en) * | 2012-11-22 | 2013-02-13 | 宝钢集团常州轧辊制造公司 | Preheating treatment method for supporting roller |
Non-Patent Citations (1)
| Title |
|---|
| 杨卓 等: "一种托辊的热处理工艺改进", 《有色矿冶》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177228A (en) * | 2015-07-23 | 2015-12-23 | 柳州市众力金铭热处理有限公司 | 40Cr steel rod quenching method for quartz sand rod mill |
| CN114574671A (en) * | 2022-03-14 | 2022-06-03 | 河南精诚汽车零部件有限公司 | Quantitative speed-control heat treatment process for roller skin of ball press |
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Application publication date: 20141119 |