CN114350927A - Heat treatment method for improving performance of supporting roller - Google Patents
Heat treatment method for improving performance of supporting roller Download PDFInfo
- Publication number
- CN114350927A CN114350927A CN202111497367.5A CN202111497367A CN114350927A CN 114350927 A CN114350927 A CN 114350927A CN 202111497367 A CN202111497367 A CN 202111497367A CN 114350927 A CN114350927 A CN 114350927A
- Authority
- CN
- China
- Prior art keywords
- supporting
- tempering
- temperature
- supporting roller
- roll forging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a heat treatment method for improving the performance of a supporting roller, which belongs to the technical field of supporting roller manufacturing and comprises the following steps: step 1, manufacturing a roller body: the production of refined steel ingots is adopted, and the steel ingots are heated and forged according to the process requirements to prepare supporting roll forging stocks; step 2, heating and quenching: rapidly heating the surface layer of the roll body of the supporting roll forging stock to an austenitizing temperature of 980-1050 ℃ at a speed of 10 ℃/min within a depth range of 150mm by adopting induction quenching, wherein the austenite heat preservation time is 100-180 min; step 3, water spraying and cooling: after the heat preservation is finished, the supporting roll forging stock is cooled to room temperature by water spraying; step 4, tempering: carrying out medium-temperature tempering treatment on the supporting roll forging stock cooled to room temperature; the tempering temperature is 470-520 ℃; and 5, processing a finished product: and (4) tempering, naturally cooling to room temperature, and processing to obtain a finished product according to the requirements of the drawing. The invention improves the contact fatigue performance of the supporting roller under the condition that the alloy content is not increased.
Description
Technical Field
The invention relates to the technical field of supporting roller manufacturing, in particular to a heat treatment method for improving the performance of a supporting roller.
Background
Because the supporting roll is overlong in the on-machine rolling period, the supporting roll is frequently subjected to abrasion and extrusion deformation in the use process. The contact fatigue performance and the accident resistance of the supporting roller are main indexes for evaluating the performance of the supporting roller. Especially, the quality requirement of the current rolled material is gradually improved, the rolling deformation tensile strength is gradually increased, higher requirements are provided for the service performance of the supporting roller, and the main method for conventionally improving the performance of the supporting roller is to increase alloy and improve the grade of the material. However, as the alloy content increases, the production cost of the backup roll increases significantly. However, the improvement of the material is only beneficial to the improvement of the wear resistance of the supporting roller, and the influence on the contact fatigue performance of the supporting roller is limited.
In order to better meet the market demand and ensure the service performance of the supporting roller, a heat treatment method for improving the performance of the supporting roller needs to be developed. The contact fatigue performance of the supporting roller is improved by adopting a method for optimizing heat treatment process parameters under the condition that the alloy content is not increased.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a heat treatment method for improving the performance of a supporting roller, and the contact fatigue performance of the supporting roller is improved by adopting a method for optimizing heat treatment process parameters under the condition that the alloy content is not increased.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a heat treatment method for improving the performance of a supporting roller comprises the following steps:
step 1, manufacturing a roller body: the production of refined steel ingots is adopted, and the steel ingots are heated and forged according to the process requirements to prepare supporting roll forging stocks;
step 2, heating and quenching: rapidly heating the surface layer of the roll body of the supporting roll forging stock within the depth range of 150mm by adopting induction quenching, raising the temperature to austenitizing temperature and prolonging the heat preservation time;
step 3, water spraying and cooling: after the heat preservation is finished, the supporting roll forging stock is cooled to room temperature by water spraying;
step 4, tempering: carrying out medium-temperature tempering treatment on the supporting roll forging stock which is cooled to room temperature by water spraying;
and 5, processing a finished product: and (4) tempering, naturally cooling to room temperature, and processing into a supporting roller finished product according to a drawing.
The technical scheme of the invention is further improved as follows: in the step 2, the heating speed is 10 ℃/min, the austenitizing temperature is 980-1050 ℃, and the austenite heat preservation time is set to be 100-180 min.
The technical scheme of the invention is further improved as follows: in the step 3, the tempering temperature is 470-520 ℃.
Due to the adoption of the technical scheme, the invention has the technical progress that:
1. the invention avoids the waste of heat transferred to the central part by rapidly heating the surface layer of the supporting roller within the depth range of 150mm, simultaneously improves the cooling speed of the central part during quenching and cooling and improves the depth of a hardening layer.
2. According to the invention, more alloy can be blended into the matrix by greatly prolonging the austenite heat preservation time (the heat preservation time in the prior art is about 30min generally), and the wear resistance and the contact fatigue performance of the supporting roller are improved.
3. According to the invention, under the condition of not needing to improve the grade of the material (increase the alloy), the service performance of the supporting roller is improved by adjusting and optimizing the heat treatment process parameters, and meanwhile, the defect that the production cost is increased due to the increase of the alloy is avoided for the material of the supporting roller.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
a heat treatment method for improving the performance of a supporting roller comprises the following steps:
step 1, manufacturing a roller body: the production of refined steel ingots is adopted, and the steel ingots are heated and forged according to the process requirements to prepare supporting roll forging stocks;
step 2, heating and quenching: rapidly heating the surface layer of the roll body of the supporting roll forging stock to the austenitizing temperature of 980-1050 ℃ at the speed of 10 ℃/min within the depth range of 150mm by adopting induction quenching, and setting the austenite heat preservation time to be 100-180 min;
step 3, water spraying and cooling: after the heat preservation is finished, the supporting roll forging stock is cooled to room temperature by water spraying;
step 4, tempering: carrying out medium-temperature tempering treatment on the supporting roll forging stock which is cooled to room temperature by water spraying; the tempering temperature is 470-520 ℃;
and 5, processing a finished product: and (4) tempering, naturally cooling to room temperature, and processing into a supporting roller finished product according to a drawing.
Example 1
A heat treatment method for improving the performance of a supporting roller comprises the following steps:
specification of the supporting roll: phi 1310 × 1380 × 4970; single weight: 21 tons; the hardness requirement of the roller body is as follows: HSD 60-65.
Material of the supporting roll: cr5 forged steel.
Step 1, manufacturing a roller body: the production of refined steel ingots is adopted, and the steel ingots are heated and forged according to the process requirements to prepare supporting roll forging stocks;
step 2, heating and quenching: rapidly heating the surface layer of the roll body of the supporting roll forging stock to an austenitizing temperature within a depth range of 150mm by adopting induction quenching, and preserving the temperature; the heating speed of the roller body is 10 ℃/min, the austenitizing temperature is 980 ℃, and the austenite heat preservation time is 150 min;
step 3, water spraying and cooling: after the heat preservation is finished, the supporting roll forging stock is cooled to room temperature by water spraying;
step 4, tempering: carrying out medium-temperature tempering treatment on the supporting roll forging stock which is cooled to room temperature by water spraying; the tempering temperature is 520 ℃;
and 5, processing a finished product: and (4) tempering, naturally cooling to room temperature, and processing to obtain a finished product according to the requirements of the drawing.
Example 2
The difference between this example and example 1 is:
in the step 2, the austenitizing temperature is 1000 ℃, and the austenite heat preservation time of the supporting roll is 100 min;
in step 4, the tempering temperature is 490 ℃.
Example 3
The difference between this example and example 1 is:
in the step 2, the austenitizing temperature is 1020 ℃, and the austenite heat preservation time of the supporting roll is 130 min;
in step 4, the tempering temperature is 470 ℃.
Example 4
The difference between this example and example 1 is:
in the step 2, the austenitizing temperature is 1050 ℃, and the austenite heat preservation time of the supporting roll is 180 min;
in step 4, the tempering temperature is 500 ℃.
Comparative example
The difference between this example and example 1 is:
step 2, heating and quenching: the whole roll body of the supporting roll forging stock is heated up to the austenitizing temperature of 960 ℃ by adopting induction quenching, and the austenite heat preservation time is 30 min;
in step 4, the tempering temperature is 540 ℃.
In order to verify the advantages of the invention, the detection is carried out after the final quenching and tempering of the products of the embodiments 1-4 and the comparison test, and the detection items are as follows: hardness, residual stress contact fatigue. The results are shown in Table 1.
TABLE 1 test results of examples and comparative examples
As can be seen from the above table 1, the hardness of the supporting roller prepared in the embodiments 1 to 4 of the invention is basically equivalent to that of the comparative example, but the contact fatigue performance is remarkably improved, namely the supporting roller is rapidly heated to austenitize to 980-1050 ℃ at a speed of 10 ℃/min within a depth range of 150mm of the surface layer of the roller body of the supporting roller forging stock, the austenite heat preservation time is set to 100-180 min, and the tempering temperature is properly reduced, so that the contact fatigue performance of the supporting roller can be effectively improved.
In conclusion, the surface layer of the roll body of the forged blank of the supporting roll is rapidly heated by 150mm, the austenitizing temperature is adjusted, the austenite heat preservation time is greatly prolonged, and the tempering temperature is properly reduced, so that more alloys are blended into the matrix, and the wear resistance and the contact fatigue performance of the supporting roll are improved under the condition of not increasing the cost of raw materials.
Claims (3)
1. A heat treatment method for improving the performance of a supporting roller is characterized in that: the method comprises the following steps:
step 1, manufacturing a roller body: the production of refined steel ingots is adopted, and the steel ingots are heated and forged according to the process requirements to prepare supporting roll forging stocks;
step 2, heating and quenching: rapidly heating the surface layer of the roll body of the supporting roll forging stock within the depth range of 150mm by adopting induction quenching, raising the temperature to austenitizing temperature and prolonging the heat preservation time;
step 3, water spraying and cooling: after the heat preservation is finished, the supporting roll forging stock is cooled to room temperature by water spraying;
step 4, tempering: carrying out medium-temperature tempering treatment on the supporting roll forging stock which is cooled to room temperature by water spraying;
and 5, processing a finished product: and (4) tempering, naturally cooling to room temperature, and processing into a supporting roller finished product according to a drawing.
2. A heat treatment method for improving the performance of a back-up roll according to claim 1, characterized in that: in the step 2, the heating speed is 10 ℃/min, the austenitizing temperature is 980-1050 ℃, and the austenite heat preservation time is set to be 100-180 min.
3. A heat treatment method for improving the performance of a back-up roll according to claim 1, characterized in that: in the step 3, the tempering temperature is 470-520 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111497367.5A CN114350927A (en) | 2021-12-09 | 2021-12-09 | Heat treatment method for improving performance of supporting roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111497367.5A CN114350927A (en) | 2021-12-09 | 2021-12-09 | Heat treatment method for improving performance of supporting roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114350927A true CN114350927A (en) | 2022-04-15 |
Family
ID=81096878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111497367.5A Pending CN114350927A (en) | 2021-12-09 | 2021-12-09 | Heat treatment method for improving performance of supporting roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114350927A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481780A (en) * | 2008-12-06 | 2009-07-15 | 燕山大学 | Easy-to-weld superfine austenite crystal steel with superhigh intensity and high tenacity and manufacturing method thereof |
| CN105316582A (en) * | 2015-10-29 | 2016-02-10 | 中钢集团邢台机械轧辊有限公司 | Cold roll with thick quench-hardened layer and manufacturing method thereof |
| JP2019157166A (en) * | 2018-03-08 | 2019-09-19 | Ntn株式会社 | Work tempering process, and machine part obtained by said process |
| CN112795853A (en) * | 2020-12-16 | 2021-05-14 | 中钢集团邢台机械轧辊有限公司 | Manufacturing method of equal-hardness Cr5 supporting roll |
-
2021
- 2021-12-09 CN CN202111497367.5A patent/CN114350927A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481780A (en) * | 2008-12-06 | 2009-07-15 | 燕山大学 | Easy-to-weld superfine austenite crystal steel with superhigh intensity and high tenacity and manufacturing method thereof |
| CN105316582A (en) * | 2015-10-29 | 2016-02-10 | 中钢集团邢台机械轧辊有限公司 | Cold roll with thick quench-hardened layer and manufacturing method thereof |
| JP2019157166A (en) * | 2018-03-08 | 2019-09-19 | Ntn株式会社 | Work tempering process, and machine part obtained by said process |
| CN112795853A (en) * | 2020-12-16 | 2021-05-14 | 中钢集团邢台机械轧辊有限公司 | Manufacturing method of equal-hardness Cr5 supporting roll |
Non-Patent Citations (1)
| Title |
|---|
| 陈大乐: "奥氏体化保温时间对高速钢工作辊组织和耐磨性的影响", 《金属热处理》, vol. 30, no. 12, pages 9 - 12 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107201524B (en) | Laser strengthening processing forming method for surface of rotary wheel | |
| CN101956145B (en) | Semi high speed steel cold-rolling intermediate roll and manufacturing method thereof | |
| CN109266826B (en) | Production method of low-carbide net-shaped grade GCr15 bearing round steel | |
| CN1186135C (en) | Productive method for Cr 12 Mov rolling cogging | |
| US20230332261A1 (en) | Method for manufacturing equal-hardness cr5 back up roll | |
| CN110656294A (en) | Working roll special for tin-plating finisher and manufacturing method thereof | |
| CN114134399A (en) | Energy-saving steel wire rod with high bainite content for high alloy tool and manufacturing method thereof | |
| CN110804690A (en) | Manufacturing process for improving ultrasonic detection qualification rate of 42CrMo forge piece | |
| CN103753116A (en) | Method for manufacturing working roll of sendzimir mill | |
| CN110935838B (en) | Roller processing method suitable for improving forging penetration and shortening heat treatment period | |
| CN103589850B (en) | Manufacturing method for scale breaking tension leveler working roll | |
| CN113046631A (en) | Free-cutting non-quenched and tempered steel and preparation method thereof | |
| CN107790498A (en) | Cold rolling high strength car sheet specialized high-speed steel combines roller and its manufacture method | |
| CN1584065A (en) | Manufacturing method for Z210CrW12 ingots by rolling and cogging | |
| CN114350927A (en) | Heat treatment method for improving performance of supporting roller | |
| CN101513654B (en) | Straightening roller for cold rolling of wide and thick plate and manufacturing method thereof | |
| CN115637370A (en) | Cold-work die steel for flame quenching | |
| CN112695184A (en) | Heat treatment method for working roller of lithium battery pole piece | |
| CN114574669A (en) | Through shaft and preparation method thereof | |
| CN112680657B (en) | Method for manufacturing non-ferrous hot-rolled semi-high-speed steel working roll | |
| CN112430784B (en) | High-hardness large forged steel support roller and manufacturing method thereof | |
| CN112779411A (en) | Heat treatment method of high-performance forged steel cold roll | |
| CN114351049A (en) | Anti accident type forged steel backing roll | |
| CN110527903B (en) | Roller for galvanized aluminum plate and preparation method thereof | |
| CN106048455B (en) | A kind of processing method of mold materials for high intensity forging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |