CN114574671A - Quantitative speed-control heat treatment process for roller skin of ball press - Google Patents
Quantitative speed-control heat treatment process for roller skin of ball press Download PDFInfo
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- CN114574671A CN114574671A CN202210243700.8A CN202210243700A CN114574671A CN 114574671 A CN114574671 A CN 114574671A CN 202210243700 A CN202210243700 A CN 202210243700A CN 114574671 A CN114574671 A CN 114574671A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000010791 quenching Methods 0.000 claims abstract description 35
- 230000000171 quenching effect Effects 0.000 claims abstract description 34
- 239000002826 coolant Substances 0.000 claims abstract description 21
- 238000005496 tempering Methods 0.000 claims abstract description 19
- 238000004321 preservation Methods 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 18
- 239000000498 cooling water Substances 0.000 claims description 17
- 238000005192 partition Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000843 powder Substances 0.000 description 14
- 230000005540 biological transmission Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/58—Oils
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/60—Aqueous agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention provides a quantitative speed-control heat treatment process for a roller skin of a ball press, which comprises the following steps: preheating a sample at 600-650 ℃ for 1-3 h, then heating to 920-970 ℃, and carrying out heat preservation for 2-5 h; taking out the sample from the quenching furnace, precooling the sample in the air for 3-10 min, and quenching the sample into a cooling medium I for quenching for 5-10 min; taking out the sample, precooling the sample in the air for 2-5 min, quenching the sample in a cooling medium II for 20-40 min, and finally putting the roller skin into a tempering furnace for tempering treatment. The quantitative speed-control heat treatment process for the roller skin of the ball press enables the hardness of the middle part of the surface of the roller skin to be higher than that of the end part, and effectively prolongs the service life of the whole roller skin.
Description
Technical Field
The invention relates to a heat treatment process, in particular to a quantitative speed-control heat treatment process for a roller skin of a ball press.
Background
Coal powder, alloy powder, fine iron powder, aluminum ash powder, mineral powder and the like are raw materials and auxiliary materials commonly used in the metallurgical industry, but the powder is directly used in a powder state, so that dust pollution to the environment is easy to cause, and the powder is not easy to transport, in order to reduce the dust pollution and facilitate the transport, a ball press is generally required to press the powder into a spherical shape or an ellipsoidal shape, a roller skin is one of key parts of the ball press and is in direct contact with the powder, the surface of the roller skin of the ball press is frequently subjected to material collapse (also called edge brushing failure) besides normal abrasion in the process of contact forming with hard powder, wherein the abrasion at two ends of the roller skin is particularly obvious because the surface stress of the roller skin of the ball press is uneven in the process of forming the powder, the stress at the edge is more uneven and is in an asymmetrical stress state in the process of pressing the powder, and the hardness at the edge part of the roller skin is generally equal to or higher than the central hardness, on the premise that the material properties are the same, the positions of the corners are more easily broken, and on the premise that the hardness of the edge part of the roller skin is higher than that of the center, the wear resistance of the edge part of the roller skin is improved, but the brittleness is greatly improved, and the possibility of breaking is improved accordingly.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The invention aims to provide a quantitative speed-control heat treatment process for a roller skin of a ball press, aiming at the defects of the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
a quantitative speed-control heat treatment process for a roller skin of a ball press comprises the following steps: preheating a sample at 600-650 ℃ for 1-3 h, then heating to 920-970 ℃, and carrying out heat preservation for 2-5 h; taking out the sample from the quenching furnace, precooling the sample in the air for 3-10 min, and quenching the sample in a cooling medium I for 5-10 min; taking out the sample, precooling the sample in the air for 2-5 min, quenching the sample in a cooling medium II for 20-40 min, and finally putting the roller skin into a tempering furnace for tempering treatment.
Based on the above, the temperature rise rate is 10 ℃/min before the temperature rises to 600-650 ℃, and the temperature rise rate is 10 ℃/min during the temperature rises from 600-650 ℃ to 920-970 ℃.
Based on the above, the tempering temperature is 200-260 ℃, and the tempering time is 2-5 h.
Based on the above, the cooling medium I is cooling water, and the axis of the sample is perpendicular to the cooling water inlet.
Based on the above, the cooling medium ii includes cooling oil and cooling water.
Based on the above, the quenching cooling device is arranged corresponding to the cooling medium II and comprises a liquid collecting tank, the liquid collecting tank is divided into three parts through a partition plate, the two sides of the liquid collecting tank are cooling oil tanks, the middle part of the liquid collecting tank is a cooling water tank, and one side of the liquid collecting tank is provided with a water spray nozzle and an oil spray nozzle corresponding to the cooling oil tanks and the cooling water tank respectively.
Based on the above, the other side of the liquid collecting tank is provided with the baffle.
Based on the above, the upside middle part of baffle sets up the arc breach, sets up a plurality of friction pulleys in this arc breach, and one of them friction pulley connects driving motor.
Based on the above, the quenching cooling device further comprises a cooling tool, wherein the cooling tool comprises two groups of clamping parts, the upper ends of the two groups of clamping parts are connected to the two ends of a cross beam, and a lifting part is arranged on the cross beam.
Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, and particularly provides a quantitative speed-control heat treatment process for the roller skin of the ball press. The quantitative speed-control heat treatment process for the roller skin of the ball press enables the hardness of the middle part of the surface of the roller skin to be higher than that of the end part, and effectively prolongs the service life of the whole roller skin.
Drawings
FIG. 1 is a schematic view of a quench cooling apparatus according to the present invention.
Fig. 2 is a schematic view of the structure of the separator in the present invention.
In the figure: 1. a liquid collecting tank; 2. cooling the oil pool; 3. a cooling water pool; 4. a partition plate; 5. an oil injection port; 6. a water jet; 7. an arc-shaped notch; 8. a friction wheel.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
In the following examples, the diameter of the roller skin test piece is 750 mm, 9Cr2Mo steel is adopted, and the specific components comprise (wt%): 0.85-0.95% of C; 1.7 to 2.1 percent of Cr; 0.2 to 0.35 percent of Mn; 0.2 to 0.4 percent of Mo; ni is less than or equal to 0.25 percent.
Example 1
A quantitative speed-control heat treatment process for a roller skin of a ball press comprises the following steps: firstly, heating a sample to 650 ℃ at the speed of 10 ℃/min, preheating for 3 h, then heating to 970 ℃ at the speed of 10 ℃/min, preserving heat for 3 h, and then quenching; taking out the sample from the quenching furnace, precooling the sample in the air for 3 min, and quenching the sample in a cooling medium I for 8 min; taking out the sample, precooling the sample in the air for 5 min, quenching the sample in a cooling medium II for 30 min, and finally putting the roller skin into a tempering furnace for tempering treatment.
Preferably, the tempering temperature is 200 ℃ and the tempering time is 3 h. Preferably, the cooling medium I is cooling water, and the axis of the sample is perpendicular to the cooling water inlet. The cooling medium II comprises cooling oil and cooling water.
Preferably, as shown in fig. 1-2, a quenching cooling device is arranged corresponding to the cooling medium ii, and the quenching cooling device comprises a liquid collecting tank 1, wherein the liquid collecting tank is divided into three parts by a partition plate, cooling oil tanks 2 are arranged at two sides, a cooling water tank 3 is arranged at the middle part, water spray nozzles 6 and oil spray nozzles 5 are respectively arranged at one side of the liquid collecting tank corresponding to the cooling oil tanks and the cooling water tank, and the water spray nozzles can be uniformly arranged in multiple groups along the cooling water tank; a baffle is arranged on the other side of the liquid collecting tank; the middle part of the upper side of the partition plate 4 is provided with an arc-shaped notch, a plurality of friction wheels 8 are arranged in the arc-shaped notch 7, one of the friction wheels is connected with a driving motor, so that the driving motor drives the friction wheels to rotate to enable the sample to rotate, a transmission rod can be arranged to connect the friction wheels on the two partition plates for transmission, and one end of the transmission rod is connected with the driving motor.
Specifically, the position of baffle needs the specification that adapts to the roller skin sample among the quenching cooling device, and for the convenience of adapting to different specifications, can set up the baffle into conventional detachable connection mode such as sliding connection, reduction equipment cost, in this embodiment, the interval between two baffles is 600 mm.
Preferably, the quenching cooling device further comprises a cooling tool, wherein the cooling tool comprises two groups of clamping parts, the upper ends of the two groups of clamping parts are connected to two ends of a cross beam, and a lifting part is arranged on the cross beam so as to be connected with a lifting equipment moving sample.
The sample is sent to a quality technology supervision inspection and detection center in coke industry, the hardness of the middle part and the two side parts of the roller skin subjected to heat treatment in the embodiment 1 is measured to be 64 HRC, 60 HRC and 60 HRC respectively, and the average taper deformation of the roller skin is 0.5-0.8 mm. The capability of forming mineral powder by the roller skin is as high as 9000 tons.
Comparative sample
The heat treatment process of the comparative sample is to keep the temperature at 970 ℃ for 3 h, after austenitizing, quenching by quenching oil and then tempering. The sample is sent to a quality technology supervision inspection and detection center in coke industry, and the hardness of the middle part and the two side parts of the roller skin of the comparison sample is measured to be 62 HRC, 63 HRC and 63 HRC respectively, namely the hardness of the middle part and the side parts of the roller skin of the comparison sample are basically the same, the average taper deformation of the roller skin is 2-3 mm, and the capability of forming mineral powder of the roller skin is about 2000-4000 tons.
Example 2
This example is substantially the same as example 1, except that:
a quantitative speed-control heat treatment process for a roller skin of a ball press comprises the following steps of preheating a sample at 600 ℃ for 3 hours, heating to 920 ℃, preserving heat for 4 hours, and then quenching; taking out the sample from the quenching furnace, precooling the sample in the air for 5 min, and quenching the sample into a cooling medium I for quenching for 5 min; taking out the sample, precooling the sample in the air for 3 min, quenching the sample in a cooling medium II for 40 min, and finally putting the roller skin into a tempering furnace for tempering treatment.
Example 3
This example is essentially the same as example 1, except that:
a quantitative speed-control heat treatment process for a roller skin of a ball press comprises the following steps of preheating a sample at 630 ℃ for 1 h, heating to 950 ℃ and preserving heat for 4 h, and then quenching; taking out the sample from the quenching furnace, precooling the sample in the air for 3 min, and quenching the sample in a cooling medium I for 6 min; taking out the sample, precooling the sample in the air for 2-5 min, quenching the sample in a cooling medium II for 20 min, and finally putting the roller skin into a tempering furnace for tempering treatment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications of the embodiments of the invention or equivalent substitutions for parts of the technical features are possible; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (9)
1. A quantitative speed-control heat treatment process for a roller skin of a ball press comprises the following steps: preheating a sample at 600-650 ℃ for 1-3 h, then heating to 920-970 ℃, and carrying out heat preservation for 2-5 h, and then starting quenching; taking out the sample from the quenching furnace, precooling the sample in the air for 3-10 min, and quenching the sample in a cooling medium I for 5-10 min; taking out the sample, precooling the sample in the air for 2-5 min, quenching the sample in a cooling medium II for 20-40 min, and finally putting the roller skin into a tempering furnace for tempering treatment.
2. The roller shell quantitative speed-control heat treatment process of the ball press according to claim 1, characterized in that: the temperature rise speed is 10 ℃/min before the temperature rises to 600-650 ℃, and the temperature rise speed is 10 ℃/min during the temperature rises from 600-650 ℃ to 920-970 ℃.
3. The quantitative speed-control heat treatment process for the roll skin of the ball press according to claim 1 or 2, which is characterized in that: the tempering temperature is 200-260 ℃, and the tempering time is 2-5 h.
4. The quantitative speed-control heat treatment process for the roll skin of the ball press according to claim 1 or 2, which is characterized in that: the cooling medium I is cooling water, and the axis of the sample is perpendicular to the cooling water inlet liquid.
5. The quantitative speed-control heat treatment process for the roll skin of the ball press according to claim 1 or 2, which is characterized in that: the cooling medium II comprises cooling oil and cooling water.
6. The quantitative speed-control heat treatment process for the roll skin of the ball press according to claim 5, which is characterized in that: the quenching cooling device is arranged corresponding to the cooling medium II and comprises a liquid collecting tank, the liquid collecting tank is divided into three parts through a partition plate, the two sides of the liquid collecting tank are cooling oil tanks, the middle part of the liquid collecting tank is a cooling water tank, and one side of the liquid collecting tank is provided with a water spray nozzle and an oil spray nozzle corresponding to the cooling oil tanks and the cooling water tank respectively.
7. The quantitative speed-control heat treatment process for the roll skin of the ball press according to claim 6, which is characterized in that: the other side of the liquid collecting pool is provided with a baffle.
8. The quantitative speed-control heat treatment process for the roll skin of the ball press according to claim 5 or 6, which is characterized in that: the middle part of the upper side of the partition board is provided with an arc-shaped notch, a plurality of friction wheels are arranged in the arc-shaped notch, and one of the friction wheels is connected with a driving motor.
9. The quantitative speed-control heat treatment process for the roll skin of the ball press according to claim 1, which is characterized in that: the quenching cooling device further comprises a cooling tool, wherein the cooling tool comprises two groups of clamping parts, the upper ends of the two groups of clamping parts are connected to the two ends of a cross beam, and a lifting part is arranged on the cross beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210243700.8A CN114574671A (en) | 2022-03-14 | 2022-03-14 | Quantitative speed-control heat treatment process for roller skin of ball press |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210243700.8A CN114574671A (en) | 2022-03-14 | 2022-03-14 | Quantitative speed-control heat treatment process for roller skin of ball press |
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| CN114574671A true CN114574671A (en) | 2022-06-03 |
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| CN202210243700.8A Pending CN114574671A (en) | 2022-03-14 | 2022-03-14 | Quantitative speed-control heat treatment process for roller skin of ball press |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060006861A (en) * | 2006-01-05 | 2006-01-19 | 진성중공업 주식회사 | The processing apparatus using inducting heating of the part in the main shaft and a method thereof |
| CN102560064A (en) * | 2011-12-30 | 2012-07-11 | 中信重工机械股份有限公司 | Integral thermal treatment process for roller shell of high-pressure roller mill |
| CN104152641A (en) * | 2014-08-17 | 2014-11-19 | 成都亨通兆业精密机械有限公司 | Carrier roller heat treatment technology |
| CN106119511A (en) * | 2016-08-31 | 2016-11-16 | 马鞍山市恒泰重工机械有限公司 | 9Cr2Mo smoothing roll heat treatment method based on aerofluxus quenching technical |
| CN109457102A (en) * | 2018-12-12 | 2019-03-12 | 中钢集团邢台机械轧辊有限公司 | A kind of heat treatment method of M2 high-speed steel working roll |
| CN210596166U (en) * | 2019-04-30 | 2020-05-22 | 日照钢铁控股集团有限公司 | Double-circulation heat treatment quenching oil water cooling device |
| CN214612639U (en) * | 2020-10-12 | 2021-11-05 | 山东硕力新材料科技有限公司 | Quenching oil water cooling device for double-circulation heat treatment |
-
2022
- 2022-03-14 CN CN202210243700.8A patent/CN114574671A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060006861A (en) * | 2006-01-05 | 2006-01-19 | 진성중공업 주식회사 | The processing apparatus using inducting heating of the part in the main shaft and a method thereof |
| CN102560064A (en) * | 2011-12-30 | 2012-07-11 | 中信重工机械股份有限公司 | Integral thermal treatment process for roller shell of high-pressure roller mill |
| CN104152641A (en) * | 2014-08-17 | 2014-11-19 | 成都亨通兆业精密机械有限公司 | Carrier roller heat treatment technology |
| CN106119511A (en) * | 2016-08-31 | 2016-11-16 | 马鞍山市恒泰重工机械有限公司 | 9Cr2Mo smoothing roll heat treatment method based on aerofluxus quenching technical |
| CN109457102A (en) * | 2018-12-12 | 2019-03-12 | 中钢集团邢台机械轧辊有限公司 | A kind of heat treatment method of M2 high-speed steel working roll |
| CN210596166U (en) * | 2019-04-30 | 2020-05-22 | 日照钢铁控股集团有限公司 | Double-circulation heat treatment quenching oil water cooling device |
| CN214612639U (en) * | 2020-10-12 | 2021-11-05 | 山东硕力新材料科技有限公司 | Quenching oil water cooling device for double-circulation heat treatment |
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