CN115852132A - Vertical roll tempering method - Google Patents
Vertical roll tempering method Download PDFInfo
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- CN115852132A CN115852132A CN202211560455.XA CN202211560455A CN115852132A CN 115852132 A CN115852132 A CN 115852132A CN 202211560455 A CN202211560455 A CN 202211560455A CN 115852132 A CN115852132 A CN 115852132A
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- tempering
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Abstract
The invention discloses a vertical roll hardening and tempering method, which belongs to the technical field of roll treatment, wherein in the cooling stage control, a plurality of layers of ceramic fibers and/or iron sheets are wrapped at the part with lower hardening and tempering hardness of a vertical roll for quenching; and controlling in a tempering stage, namely removing a plurality of layers of ceramic fibers and/or iron sheets at the part with lower hardening and tempering hardness of the vertical roll, wrapping the plurality of layers of ceramic fibers and/or iron sheets at the part with higher hardening and tempering hardness of the vertical roll, and performing hardening and tempering to obtain different parts of the vertical roll with different quenching strengths and hardnesses so as to control the cooling strength and the tempering strength in the hardening and tempering process of the different parts and achieve the purpose of different quenching strengths and hardnesses of the different parts of the roll after quenching.
Description
Technical Field
The invention belongs to the technical field of roller treatment, and particularly relates to a vertical roller tempering method.
Background
The hardness requirements of the roller body and the roller neck of a partial vertical roller are different currently, on-site heat treatment equipment comprises a box-type resistance furnace and an integral quenching water tank, heating and heat preservation time of each part of a product is the same in the heating process, all parts are cooled simultaneously in the cooling process, cooling media are all water, hardness of each part of the roller after hardening and tempering is the same, if intersection exists according to hardening and tempering hardness requirements of different parts of the roller, on-site control can be performed according to intersection hardness, but if intersection does not exist in hardening and tempering hardness of different parts of the roller, control can be performed only according to intermediate values of different hardness, and the control mode cannot completely meet requirements of users.
Disclosure of Invention
The invention aims to solve the technical problems and provides a vertical roll quenching and tempering method which is used for controlling the cooling intensity in the quenching and tempering process of different parts so as to achieve the purpose of different quenching intensities and hardness of different parts of a quenched roll.
The technical scheme adopted by the invention is as follows:
a method of conditioning a vertical roll, comprising:
controlling a cooling stage, namely wrapping a plurality of layers of ceramic fibers and/or iron sheets on the part with lower hardening and tempering hardness of the vertical roll for quenching;
and controlling in a tempering stage, namely removing a plurality of layers of ceramic fibers and/or iron sheets at the part with lower hardening and tempering hardness of the vertical roll, and then wrapping the plurality of layers of ceramic fibers and/or iron sheets at the part with higher hardening and tempering hardness of the vertical roll for hardening and tempering to obtain different parts of the vertical roll with different quenching strengths and hardnesses.
The invention has the further improvement that the hardness after quenching is detected to obtain the corresponding relation between the wrapping layer number of the ceramic fiber and/or the iron sheet and the hardness deviation.
In a further improvement of the invention, the quenching is water quenching.
Due to the adoption of the technical scheme, the invention has the technical progress that:
according to the invention, through improving the vertical roll quenching and tempering process, the mode of wrapping ceramic fibers and iron sheets at different positions in the quenching and tempering process is innovatively adopted, the requirements of different quenching and tempering hardness at different positions are ensured, and meanwhile, according to a large number of field experiments, the influence effect of different wrapping layer numbers on the quenching and tempering hardness is summarized, and the consistency of the product quality is ensured. And (3) the subsequent workshop carries out quenching and tempering to produce more than 20 vertical rolls, and the hardness of the roll body and the roll neck meet the requirements of the product technical agreement.
Drawings
FIG. 1 is a drawing showing a method of using the thermal refining apparatus of the present invention.
Detailed Description
The present invention is further illustrated in detail below with reference to examples:
the idea of the invention is that the ceramic fiber and the iron sheet are wrapped at different parts of the roller to control the cooling intensity of different parts in the quenching and tempering processes, so as to achieve the purpose of different quenching intensities and hardness of different parts of the roller after quenching, and meanwhile, the ceramic fiber is wrapped at the part with higher hardness of the roller body in the tempering process, so as to reduce the tempering effect, and finally, the purpose of controlling the quenching and tempering hardness of different areas after integral quenching and tempering is achieved. The specific implementation is as follows:
(1) And controlling a cooling stage, carrying out a process experiment on site, wrapping ceramic fibers and iron sheets with different layers of products with different sizes and specifications, quenching, detecting the hardness after quenching, and searching the corresponding relation between the wrapping layers and the hardness deviation.
(2) Controlling the tempering stage, carrying out a process experiment, removing the ceramic fiber at the position with lower requirement on hardening and tempering hardness after water quenching and before hardening and tempering of the product, wrapping the position with higher hardening and tempering hardness, executing the whole hardening and tempering process, and checking and recording the influence of different wrapping layers on the hardening and tempering hardness.
And (4) subsequently, summarizing specific numerical values of the influence of the ceramic fiber wrapping layer number on the hardness in the quenching and tempering processes through mass data accumulation, and forming a primary process principle. And then, according to a PDCA principle, the formed process principle is used for carrying out trial production on formal products, the guiding of the process principle is detected, the original process principle is optimized again, and finally the guiding of the vertical roll quenching and tempering process, the product quality and the consistency are improved.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.
Claims (3)
1. A vertical roll tempering method is characterized by comprising the following steps:
controlling a cooling stage, namely wrapping a plurality of layers of ceramic fibers and/or iron sheets at the part with lower hardening and tempering hardness of the vertical roll for quenching;
and controlling the tempering stage, namely removing a plurality of layers of ceramic fibers and/or iron sheets at the position with lower hardening and tempering hardness of the vertical roll, and wrapping the plurality of layers of ceramic fibers and/or iron sheets at the position with higher hardening and tempering hardness of the vertical roll for hardening and tempering to obtain different positions of the vertical roll with different quenching strengths and hardnesses.
2. A method for tempering a vertical roll according to claim 1, wherein: and detecting the hardness after quenching to obtain the corresponding relation between the number of the ceramic fiber and/or iron sheet wrapping layers and the hardness deviation.
3. A method for tempering a vertical roll according to claim 1, wherein: the quenching is water quenching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211560455.XA CN115852132A (en) | 2022-12-06 | 2022-12-06 | Vertical roll tempering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211560455.XA CN115852132A (en) | 2022-12-06 | 2022-12-06 | Vertical roll tempering method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115852132A true CN115852132A (en) | 2023-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211560455.XA Pending CN115852132A (en) | 2022-12-06 | 2022-12-06 | Vertical roll tempering method |
Country Status (1)
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| CN (1) | CN115852132A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01197007A (en) * | 1988-02-01 | 1989-08-08 | Nippon Steel Corp | Rolls with ceramic or cermet coating |
| RU2163644C1 (en) * | 1999-12-29 | 2001-02-27 | Ветер Владимир Владимирович | Method of rolls heat treatment |
| CN102321795A (en) * | 2011-10-17 | 2012-01-18 | 中钢集团邢台机械轧辊有限公司 | Heat treatment method for high ferrochrome roll requiring stepped hardness of roll body |
| CN105200223A (en) * | 2015-08-25 | 2015-12-30 | 宝钢轧辊科技有限责任公司 | Large forged steel supporting roller heat treatment method |
| CN105385832A (en) * | 2015-12-24 | 2016-03-09 | 二重集团（德阳）重型装备股份有限公司 | Surface quenching and tempering combined heat processing technology for aluminum alloy rolling mill work roll |
| CN105483353A (en) * | 2015-12-03 | 2016-04-13 | 中钢集团邢台机械轧辊有限公司 | Differential-temperature thermal treatment method of high-carbon high-speed steel roller |
| US20180361445A1 (en) * | 2015-11-17 | 2018-12-20 | Fujico Co., Ltd. | Roll for hot rolling process and method for manufacturing same |
-
2022
- 2022-12-06 CN CN202211560455.XA patent/CN115852132A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01197007A (en) * | 1988-02-01 | 1989-08-08 | Nippon Steel Corp | Rolls with ceramic or cermet coating |
| RU2163644C1 (en) * | 1999-12-29 | 2001-02-27 | Ветер Владимир Владимирович | Method of rolls heat treatment |
| CN102321795A (en) * | 2011-10-17 | 2012-01-18 | 中钢集团邢台机械轧辊有限公司 | Heat treatment method for high ferrochrome roll requiring stepped hardness of roll body |
| CN105200223A (en) * | 2015-08-25 | 2015-12-30 | 宝钢轧辊科技有限责任公司 | Large forged steel supporting roller heat treatment method |
| US20180361445A1 (en) * | 2015-11-17 | 2018-12-20 | Fujico Co., Ltd. | Roll for hot rolling process and method for manufacturing same |
| CN105483353A (en) * | 2015-12-03 | 2016-04-13 | 中钢集团邢台机械轧辊有限公司 | Differential-temperature thermal treatment method of high-carbon high-speed steel roller |
| CN105385832A (en) * | 2015-12-24 | 2016-03-09 | 二重集团（德阳）重型装备股份有限公司 | Surface quenching and tempering combined heat processing technology for aluminum alloy rolling mill work roll |
Non-Patent Citations (1)
| Title |
|---|
| 王浩: "《工程材料学》", 31 March 2020, 北京冶金工业出版社, pages: 126 * |
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