CN100376695C - Method for making quench hardening layer of cold roll barrel - Google Patents
Method for making quench hardening layer of cold roll barrel Download PDFInfo
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- CN100376695C CN100376695C CNB2005100593436A CN200510059343A CN100376695C CN 100376695 C CN100376695 C CN 100376695C CN B2005100593436 A CNB2005100593436 A CN B2005100593436A CN 200510059343 A CN200510059343 A CN 200510059343A CN 100376695 C CN100376695 C CN 100376695C
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Abstract
The present invention relates to a manufacture method of quench hardening layers of roller bodies of cold rolling work rollers. The roller is made of steel, and an inductor is used for induction electric heating treatment on the roller body of the roller. The induction electric heating treatment on the roller body of the roller is a process that the roller body of the roller orderly goes through a first low frequency inductor, a second low frequency inductor and an intermediate frequency inductor to be heated. The surface of the roller body of the roller is in water spray cooling treatment through spraying water. Thus, a quench hardening layer is manufactured on the roller body. The method of the present invention can effectively enhance the depth of the obtained effective quench hardening layer. The effective quench hardening layer with the depth of more than 50mm can be manufactured when a proper material is used. When in use, the roller with the deep quench hardening layer manufactured by the method of the present invention has the advantages of roller wearing delay, long roller change time, high production rate of a rolling mill, high yield and low consumption, so the present invention has great economic benefit.
Description
Technical field
The present invention relates to a kind of heat treating method, especially relate to a kind of manufacture method of quench hardening layer of cold roll barrel.
Background technology
The performance of quench hardening layer of cold roll barrel, promptly its degree of depth and hardness are to weigh an important indicator of cold roll manufacturing technology level always.
Because cold roll be crooked, reverse, work under the condition of stressed complexity such as extruding, at this time the part top layer is subjected to the stress more much higher than heart portion, the surface also will constantly be worn simultaneously, therefore must make quench-hardened case at the cold roll body of roll, make body of roll top layer have higher intensity, hardness, wear resistance and safe range of stress, and body of roll heart portion must keep enough plasticity and toughness for the effect of the load that can withstand shocks.In this case, needing the breaker roll body of roll to carry out hard surfacing handles.
The hard surfacing of roller body is a method of utilizing rapid heating, and the roll top layer austenitizing of only will waiting to quench quenches then, obtains martensitic stucture on the surface.Hard surfacing does not change chemical ingredients, only changes textura epidermoidea, makes the top layer be strengthened and harden, and promptly make quench-hardened case on the top layer, and core structure does not change, or the tissue before the hard surfacing, thereby makes heart portion keep certain toughness and intensity.The method for quenching surface of roller body is more, and commonly used have induction electrically heated hard surfacing, i.e. an induced surface hardening.It is that roll is put into inductor block that the induced electricity heating surface quenches, be in the ruhmkorff coil, after ruhmkorff coil feeds exchange current, produce alternating magnetic field immediately, it is identical to produce frequency so in roll, the induced current that direction is opposite, induced current forms the loop in roll, be commonly called as " eddy current ", and current density is at the workpiece surface skewness, surface density is big, center density is little, and under the effect of roll self-resistance, the roll top layer is heated to quenching temperature rapidly, after immediately to its water spray cooling, can obtain quench-hardened case on the roller body top layer.
Roll can obtain martensite on the top layer and add the residual austenite tissue after the induced electricity heating surface quenches, this is a kind of unsettled tissue, if run into suitable condition, can change at any time, and causing the variation of roll shape and size, this breaker roll service requirements is unallowed.
Roll has the existence of bigger thermal stresses and structural stress on the top layer after quenching through the induced electricity heating surface in addition, if these stress of untimely elimination will further expand.Concentrating and expansion of stress can make part deformation and cracking, so should in time eliminate stress.
For stabilizing tissue, stable dimensions is in time eliminated internal stress, avoid being out of shape the generation with crackle, also must do temper to the roll that obtains after quenching, make carbon atom separate out and form granular, thereby obtain tempered martensite, so that roll has good processing properties and use properties.
Induction heating method commonly used is that duplexing frequency inductor heating and power frequency, intermediate frequency dual inductor heat, and has developed into a kind of suitable proven technique, but also exists defective.
The duplex frequency inductor quenches when making quench-hardened case, can make effective quench-hardened case of the most about 30mm, effectively quench-hardened case is meant the quench-hardened case of hardness more than or equal to 90HSD, but can not lose by the full remuneration roll surface temperature, easily cause time top layer overheated, cause transition layer not too to relax, the back internal stress of quenching is bigger.Power frequency, intermediate frequency dual inductor quench when making quench-hardened case, exist the insufficient shortcoming of heat penetration again, are difficult to make the above effective quench-hardened case of 30mm.
Traditional induced electricity heating surface quenching machine has single frequency duplex frequency inductor heating lathe, power frequency and intermediate frequency dual inductor heating lathe etc.For example Chinese patent 92216888.1 discloses a kind of large-scale double frequency quenching machine that large-scale shaft workpieces such as cold roll are quenched of being used for, this double frequency quenching machine is made up of transmission mechanism, cruciform bracing, counter weight device, support body, top beam, transformer dolly, quenching tank, and the bed body is provided with inductor block.
Summary of the invention
The manufacture method that the purpose of this invention is to provide a kind of quench hardening layer of cold roll barrel improves the degree of depth of effective quench-hardened case.
The overall technology design that realizes the object of the invention is: thus taking the quenching of induced electricity heating surface to make in the method for quench-hardened case, seek proper heat treatment technology and processing parameter thereof, especially the cold roll body of roll is being responded in the electrically heated operation, even adopt three inductor block heating process roller bodys to be heated by the first low frequency induction device, the second low frequency induction device and intermediate frequency inductor successively, to improve the degree of depth and the hardness of roller body quench-hardened case.
Realize the manufacture method of a kind of quench hardening layer of cold roll barrel of the object of the invention, be to use the inductor block breaker roll body of roll to carry out the induced electricity heat treated, again to the roller body surface sprinkling to its cooling process of spraying water, thereby make quench-hardened case at roller body; Wherein to carry out the induced electricity heat treated be that roller body is heated by the first low frequency induction device, the second low frequency induction device and intermediate frequency inductor successively to the breaker roll body of roll.Line-frequency induction device as herein described is meant that frequency of utilization is the inductor block of the exchange current of 50Hz, the low frequency induction device is meant that frequency of utilization is the inductor block of 30Hz～150Hz exchange current, and intermediate frequency inductor is meant that frequency of utilization is the inductor block of 200Hz～2000Hz exchange current.In three inductor block electrically heated, first low frequency induction device is used for the roller body top layer is heated to more than the Curie temperature, second low frequency induction device be used for realizing dark diathermanous heating at roller body, the 3rd inductor block, is that intermediate frequency inductor then is mainly used in the temperature of regulating the roller body top layer.
The frequency of the above-mentioned exchange current that feeds to the first low frequency induction device, the second low frequency induction device is preferably 40Hz～60Hz, and the frequency of the exchange current that feeds to intermediate frequency inductor is preferably 200Hz～300Hz.
The frequency of the above-mentioned exchange current that feeds to the first low frequency induction device, the second low frequency induction device is 50Hz, and the frequency of the exchange current that feeds to intermediate frequency inductor is 250Hz.
It is above-mentioned that to make the temperature of roller body in the heating zone of the first low frequency induction device and the second low frequency induction device be the A of roller body material
C1Above 30 ℃～50 ℃ of transformation temperature, the temperature in the heating zone of intermediate frequency inductor are A
C1The A of roller body material
C1Above 80 ℃～100 ℃ of transformation temperature; The water that the spray of breaker roll surface is 15 ℃～30 ℃.
Carry out temper after the above-mentioned breaker roll body of roll carries out induced electricity heat treated and water spray cooling process, temper is that roll is heated to 120～200 ℃, is incubated to place it in after 80～120 hours to naturally cool to envrionment temperature in the air.
After the above-mentioned breaker roll body of roll carries out induced electricity heat treated and water spray cooling process, before temper handles, breaker roll carries out subcooling to be handled, it is to be cooled to subzero 60 ℃～subzero 120 ℃ through the roll after the water spray cooling process that subcooling is handled, and is placed on after being incubated 2～4 hours and naturally cools to envrionment temperature in the air.
Before the above-mentioned breaker roll body of roll carried out the induced electricity heat treated, first breaker roll carried out thermal pretreatment; Preheating temperature is 250 ℃～350 ℃, and soaking time is 10～28 hours.
Adopt the double frequency three inductor block lathes of the inventive method, can on the basis of traditional power frequency and intermediate frequency dual inductor heating lathe, can obtain through simple transformation at cold roll body of roll manufacturing quench-hardened case.For example on the basis of Chinese patent 92216888.1 disclosed a kind of large-scale double frequency quenching machines, only need set gradually the first low frequency induction device, the second low frequency induction device, intermediate frequency inductor from top to bottom at its body, and with inductor block with can implement the inventive method after power supply is connected accordingly.
A kind of cold roll of making by known alloys, be specially adapted to the inventive method, its alloy composition weight percentage is as described below: C is 0.82%～0.90%, Si is 0.30%～0.55%, and Mn is 0.20%～0.50%, and Cr is 4.90%～5.40%, Ni is 0.30%～0.50%, Mo is 0.20%～0.40%, and V is 0.10%～0.20%, and all the other are Fe and unavoidable impurities.
It is that roller body is heated by the first line-frequency induction device, the second line-frequency induction device, intermediate frequency inductor successively that the roller body that uses above-mentioned material is carried out the induced electricity heat treated.Wherein the frequency of the exchange current that feeds to intermediate frequency inductor is 200Hz～300Hz, is preferably 250Hz.
The roller body that uses above-mentioned material carried out the induced electricity heat treated is that to make the temperature of roller body in the first line-frequency induction device and the second line-frequency induction device heating zone be 860 ℃～960 ℃, temperature in the intermediate frequency inductor heating zone is 940 ℃～980 ℃; The water that the spray of breaker roll surface is 15 ℃～30 ℃.
Adopt the inventive method at the double frequency three inductor block lathes of the roller body that uses above-mentioned material being made quench-hardened case, can on the basis of traditional power frequency and intermediate frequency dual inductor heating lathe, can obtain through simple transformation.Its transformation process is to increase a new line-frequency induction device on traditional power frequency and intermediate frequency dual inductor heater bedstead body, and line-frequency induction device that increases newly and former line-frequency induction device are parallel-connection structure, a promptly shared power frequency supply.
At above-mentioned induced electricity heating installation---be in the above-mentioned double frequency three inductor block lathes, set gradually the first line-frequency induction device, the second line-frequency induction device, intermediate frequency inductor, water-jet, continuous cold drop from the top down, wherein the level interval of roller body and the first line-frequency induction device be 12mm～62mm, with the level interval of the second line-frequency induction device be 20mm～75mm, and the level interval of intermediate frequency inductor be 20mm～75mm; The vertical spacing that makes the first line-frequency induction device and the second line-frequency induction device is that the vertical spacing of 10mm～65mm, the second line-frequency induction device and intermediate frequency inductor is that the vertical spacing of 10mm～65mm, intermediate frequency inductor and water-jet is 10mm～65mm; Make roll in lathe on one side the speed with 0.3mm/s～1.5mm/s vertically descend, on one side with the speed rotation of 40rad/min～360rad/min.
When the lower rim of the roller body that uses above-mentioned material stretches into the first line-frequency induction device 10mm～20mm, beginning is switched on to inductor block, when the lower rim of roller body stretched into water-jet 10mm～20mm, water-jet began the water of 15 ℃～30 ℃ of part roller body sprays in stretching into water-jet; When the upper limb of roller body leaves the second line-frequency induction device, stop to the first line-frequency induction device and the power supply of the second line-frequency induction device; When the upper limb of roller body drops to apart from intermediate frequency inductor lower rim 10mm～20mm, is the body of roll when also having 10mm～20mm in intermediate frequency inductor, stop to power to intermediate frequency inductor; Roll is continued to drop in the continuous cold drop continuous cold 1 to 2 hours.
Breaker roll carried out thermal pretreatment before the roller body that uses above-mentioned material carried out the induced electricity heat treated, and the breaker roll body of roll carries out after induced electricity heat treated and the water spray cooling process, and then breaker roll carries out subcooling successively and handles and temper.
It is that roll is heated to 250 ℃～350 ℃ that the roll that uses above-mentioned material is carried out thermal pretreatment, and is incubated 23 hours to 25 hours; It is that roller temperature is reduced to subzero 60 ℃～subzero 120 ℃ that breaker roll carries out that subcooling handles, and roll is placed to allow it be warming up to envrionment temperature naturally under the envrionment temperature after 6 to 8 hours; It is that roller temperature is heated to 100 ℃～200 ℃ that breaker roll carries out temper, roll is placed under the envrionment temperature to allow it naturally cool to envrionment temperature then.
It is that roll is put into the alcoholic medium pond that the roll that uses above-mentioned material is carried out the subcooling processing, lowers the temperature with dry ice or liquid nitrogen breaker roll.
The soaking time of the roll that uses above-mentioned material being carried out temper is theoretical tempering time.The method of calculation of theoretical tempering time are: roll diameter is x centimetre, and tempering time is 1.5x～2.5x hour.
The inventive method can be used for making quench-hardened case at each cold roll body of roll theoretically, but because zone of heating of the present invention is darker, the quench-hardened case of making is also darker, so the inventive method is specially adapted to the large-scale cold rolling working roll that roll diameter is 400mm～800mm.
The present invention has beneficial effect: (1) the inventive method mainly is that the suitable thermal treatment process of selection is that three inductor block heating surface quenching method carry out the hard surfacing processing to the cold roll body of roll, can obtain the quench-hardened case of high depth, high rigidity, high-wearing feature, thereby make cold roll with excellent quality.Add at induced electricity and to pine for the electric current depth of penetration heating of induced current in steel
Wherein ρ is a resistivity; μ is a permeability, and permeability and induced current frequency-independent are only relevant with temperature; F is the induced current frequency, is the frequency that feeds exchange current in inductor block.Thereby under identical temperature, the depth of penetration heating of low frequency induction electric current is darker than the depth of penetration heating of Medium frequency induction electric current
Doubly.Steel be heated to Curie temperature more than 768 ℃ after, wide variation have taken place in the permeability of steel, permeability is reduced to original
Thereby steel be heated to Curie temperature more than 768 ℃ after, the penetration depth of electric current is than increase about 4 times below Curie temperature.In the three inductor block electrically heated in the present invention, first low frequency induction device is used for the roller body top layer is heated to more than the Curie temperature, second low frequency induction device is used for realizing dark diathermanous heating at roller body, and the 3rd inductor block, promptly intermediate frequency inductor then is mainly used in the temperature of regulating the roller body top layer.Adopt the inventive method to make effective quench-hardened case more than the 50mm at the cold roll body of roll, be the quench-hardened case of the above hardness of 50mm more than or equal to 90HSD, this is that heritage answers electrically heated quenching manufacturing quench-hardened case method institute inaccessiable, the roll with dark quench-hardened case that adopts the inventive method to make in use can delay roll wear, prolong roll changing time, improve rolling rate, improve output, reduce and consume, thereby has huge economic benefit.(2) the inventive method adopts the heating of three inductor block breaker rolls surface, the energy of very high density is applied in the roller body surface certain limit and the degree of depth, make the roll top layer arrive transformation temperature at extremely short time internal heating, can lose by the compensating roller surface temperature simultaneously, have the generation and the expansion effect that suppress the roll crackle.(3) breaker roll carries out the subcooling processing and can improve roller body quench-hardened case performance.Utilize dry ice or liquid nitrogen as heat-eliminating medium, the process of cooling of the roller body after quenching is continued, make roller temperature drop to subzero 60 ℃～subzero 120 ℃, impel the residual austenite after the conventional thermal treatment further to change into martensite, thereby improve the metallic substance performance, can obviously improve wear resistance, toughness and the dimensional stability of roller body, the life-span of roll is significantly improved.(4) before breaker roll carried out the induced electricity heating, first breaker roll carried out whole preheating, can improve the austenitizing layer depth when making quench-hardened case.(5) breaker roll carries out temper, can further eliminate the internal stress that roll causes through quenching, eliminates the partial structural stress of roll, prevents body of roll distortion.(6) the present invention makes quench-hardened case technology with traditional duplexing frequency inductor heating and compares, have heating layer depth, transition layer (this transition layer is the zone between the matrix of effective quench-hardened case and heart portion) relax, quench after the darker advantage of the less and effective quench-hardened case of internal stress; Make quench-hardened case technology and compare with traditional power frequency, the heating of intermediate frequency dual inductor, have the darker advantage of the darker and effective quench-hardened case of zone of heating.(7) implementing the three inductor blocks heating lathe of the inventive method can be at common double frequency dual inductor, be can obtain through simple transformation on power frequency and the intermediate frequency dual inductor heating machine tool basic.Transformation process is that a new line-frequency induction device is installed on the machine tool support body, and line-frequency induction device that increases newly and former line-frequency induction device are parallel-connection structure.So that the enforcement of the inventive method has the advantage of little, the instant effect of investment, have huge economic benefit.
Description of drawings
Fig. 1 is the structural representation of embodiment 1 test roller.
Fig. 2 is the synoptic diagram of three inductor block electrically heated roller bodys.
Fig. 3 carries out the synoptic diagram that degree of depth stripping layer detects to the breaker roll body of roll among the embodiment 1.
Fig. 4 is that the breaker roll body of roll carries out the resulting stripping layer of degree of depth stripping layer detection hardness curve among the embodiment 1.
Fig. 5 is that 20 pairs of breaker roll bodies of roll of embodiment carry out the synoptic diagram that degree of depth stripping layer detects.
Embodiment
(embodiment 1)
Present embodiment adopt in making cold roll 5 processes expand hydrogen processing, machining, operation such as modified through smelting, esr, blank forging, nodularization after resulting cold roll 5 roller stocks be the test roller, its shape is seen Fig. 1, its roll body length a is 2030mm, roll diameter b is 520mm, the A end is the sling end of roll when induced electricity heats, and the chemical ingredients of its used material sees Table 1.
Table 1
| C | Si | Mn | P | S | Cr | Ni | Mo | V | All the other are Fe and unavoidable impurities |
| 0.82 ～0.90 | 0.30 ～0.55 | 0.20 ～0.50 | ≤ 0.020 | ≤ 0.015 | 4.90 ～5.40 | 0.30 ～0.50 | 0.20 ～0.40 | 0.10 ～0.20 |
The method that present embodiment is made quench-hardened case at the test roller body of roll is as follows: the breaker roll body of roll carries out induced electricity heat treated and water spray cooling process.See Fig. 2, the roll after the preheating moved in the double frequency three inductor block lathes that these double frequency three inductor block lathes are at common double frequency dual inductor, are to obtain through simple the transformation on power frequency and the intermediate frequency dual inductor heating machine tool basic.This lathe is the MTCL-18 type double frequency quenching machine that Belgian OSB company produces, and transformation process is that a new line-frequency induction device is set on this lathe bed body, and line-frequency induction device that increases newly and former line-frequency induction device are parallel-connection structure, a promptly shared power supply.In the improved double frequency three inductor block lathes, be disposed with the first line-frequency induction device 1, the second line-frequency induction device 2, intermediate frequency inductor 3, water-jet 4 and continuous cold drop from top to bottom, wherein the height of three inductor blocks is 165mm.The level interval of the roller body and the first line-frequency induction device 1, promptly the first line-frequency induction device, 1 internal surface is to the horizontal clearance between the body of roll outside surface, for 12mm, with the level interval of the second line-frequency induction device 2, promptly the second line-frequency induction device, 2 internal surfaces are to the horizontal clearance between the body of roll outside surface, for 20mm, with the level interval of intermediate frequency inductor 3, be intermediate frequency inductor 3 internal surfaces to the horizontal clearance between the body of roll outside surface, be 20mm; The vertical spacing of the first line-frequency induction device 1 and the second line-frequency induction device 2, i.e. vertical gap between the first line-frequency induction device, 1 lower surface to the second line-frequency induction device, 2 upper surfaces, vertical spacing for 10mm, the second line-frequency induction device 2 and intermediate frequency inductor 3, promptly the second line-frequency induction device, 2 lower surfaces are to the vertical gap between intermediate frequency inductor 3 upper surfaces, for 10mm, intermediate frequency inductor 3 are 10mm with the vertical spacing of water-jet 4.
After regulating the relative position between roll and three inductor blocks and the water-jet 4, make roll in lathe on one side with the speed rotation of 40rad/min, on one side vertically descend with the speed of 0.3m/s; When the lower rim of roller body stretches into the first line-frequency induction device 110mm, beginning is switched on to inductor block, the frequency that feeds exchange current in the first line-frequency induction device 1 and the second line-frequency induction device 2 is 50Hz, and the frequency that feeds exchange current in intermediate frequency inductor 3 is 200Hz; Power when wherein the first line-frequency induction device 1 and the second line-frequency induction device 2 quench is 580 ± 20kW, and the power when intermediate frequency inductor 3 quenches is 350 ± 15kW; When the upper limb of roller body leaves the second line-frequency induction device 2, stop to the first line-frequency induction device 1 and 2 power supplies of the second line-frequency induction device; When the upper limb of roller body drops to apart from intermediate frequency inductor 3 lower rim 10mm, is the body of roll when also having 10mm in intermediate frequency inductor 3, stop to intermediate frequency inductor 3 power supplies; In the decline heat-processed of roll, making the temperature of roll in the heating zone of the first line-frequency induction device 1 and the second line-frequency induction device 2 is the A of roller body material
C1Above 30 ℃～50 ℃ of transformation temperature, present embodiment are that 860 ℃, the temperature in the heating zone of intermediate frequency inductor 3 are the A of roller body material
C1Above 80 ℃～100 ℃ of transformation temperature, present embodiment is 940 ℃; When the lower rim of the body of roll of roll stretches into water-jet 410mm, the water that the part roller body spray of water-jet 4 beginnings in stretching into water-jet 4 is 15 ℃, hydraulic pressure is 0.08MPa; Roll continued to drop to place it in after continuous cold 1 hour in the continuous cold drop be cooled to envrionment temperature in the air.See Fig. 3, is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to this test roller body of roll with grinding machine grinding successively, the B place is stripping layer position, and its stripping layer synoptic diagram is seen shown in Figure 3, and the stripping layer detects the gained data and shows that hardness can reach 40mm more than or equal to the degree of depth of 90HSD.
(embodiment 2)
All the other are identical with embodiment 1, difference is: in the double frequency three inductor block lathes, the level interval of the roller body and the first line-frequency induction device 1 be 37mm, with the level interval of the second line-frequency induction device 2 can be 48mm, with the level interval of intermediate frequency inductor 3 be 50mm; The vertical spacing of the first line-frequency induction device 1 and the second line-frequency induction device 2 is that 37mm, the second line-frequency induction device 2 are that 37mm, intermediate frequency inductor 3 are 37mm with the vertical spacing of water-jet 4 with the vertical spacing of intermediate frequency inductor 3; After regulating the relative position between roll and three inductor blocks and the water-jet 4, make roll in lathe on one side with the speed rotation of 200rad/min, on one side vertically descend with the speed of 0.9mm/s; When the lower rim of roller body stretched into the first line-frequency induction device 115mm, beginning was to the inductor block energising, and the frequency that feeds exchange current in intermediate frequency inductor 3 is 250Hz; When the upper limb of roller body drops to apart from intermediate frequency inductor 3 lower rim 15mm, is the body of roll when also having 15mm in intermediate frequency inductor 3, stop to intermediate frequency inductor 3 power supplies; In the decline heat-processed of roll, making the temperature of roll in the heating zone of the first line-frequency induction device 1 and the second line-frequency induction device 2 is that 910 ℃, the temperature in the heating zone of intermediate frequency inductor 3 are 960 ℃; When the lower rim of the body of roll of roll stretches into water-jet 415mm, the water that the part roller body spray of water-jet 4 beginnings in stretching into water-jet 4 is 25 ℃, hydraulic pressure is 0.12MPa; Roll continued to drop to place it in after continuous cold 1.5 hours in the continuous cold drop be cooled to envrionment temperature in the air.
Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to this test roller body of roll with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen shown in Figure 3, and its stripping layer detects gained data and shows that hardness can reach 42mm more than or equal to the degree of depth of 90HSD.
(embodiment 3)
All the other are identical with embodiment 1, difference is: in the double frequency three inductor block lathes, the level interval of the roller body and the first line-frequency induction device 1 be 62mm, with the level interval of the second line-frequency induction device 2 be 75mm, with the level interval of intermediate frequency inductor 3 be 75mm; The vertical spacing of the first line-frequency induction device 1 and the second line-frequency induction device 2 is that 65mm, the second line-frequency induction device 2 are that 65mm, intermediate frequency inductor 3 are 65mm with the vertical spacing of water-jet 4 with the vertical spacing of intermediate frequency inductor 3; After regulating the relative position between roll and three inductor blocks and the water-jet 4, make roll in lathe on one side with the speed rotation of 360rad/min, on one side vertically descend with the speed of 1.5mm/s; When the lower rim of roller body stretched into the first line-frequency induction device 120mm, beginning was to the inductor block energising, and the frequency that feeds exchange current in intermediate frequency inductor 3 is 300Hz; When the upper limb of roller body leaves the second line-frequency induction device 2, stop to the first line-frequency induction device 1 and 2 power supplies of the second line-frequency induction device; When the upper limb of roller body drops to apart from intermediate frequency inductor 3 lower rim 20mm, is the body of roll when also having 20mm in intermediate frequency inductor 3, stop to intermediate frequency inductor 3 power supplies; In the decline heat-processed of roll, making the temperature of roll in the heating zone of the first line-frequency induction device 1 and the second line-frequency induction device 2 is that 960 ℃, the temperature in the heating zone of intermediate frequency inductor 3 are 980 ℃; When the lower rim of the body of roll of roll stretches into water-jet 420mm, the water that the part roller body spray of water-jet 4 beginnings in stretching into water-jet 4 is 30 ℃, hydraulic pressure is 0.15MPa; Roll continued to drop to place it in after continuous cold 2 hours in the continuous cold drop be cooled to envrionment temperature in the air.
Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to this test roller body of roll with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen shown in Figure 3, and its stripping layer detects gained data and shows that hardness can reach 41mm more than or equal to the degree of depth of 90HSD.
(embodiment 4)
All the other are identical with embodiment 1, and difference is: breaker roll carries out thermal pretreatment before the breaker roll body of roll carries out the induced electricity heat treated, and it is that roll is heated to 250 ℃ that breaker roll carries out thermal pretreatment, and is incubated 23 hours; And then then breaker roll carries out the induced electricity heat treated.
Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to this test roller body of roll with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen shown in Figure 3, and its stripping layer detects gained data and shows that hardness can reach 43mm more than or equal to the degree of depth of 90HSD.
(embodiment 5)
All the other are identical with embodiment 4, and difference is: it is that roll is heated to 350 ℃ ℃ that breaker roll carries out thermal pretreatment, and is incubated 25 hours; And then then breaker roll carries out the induced electricity heat treated.
Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to this test roller body of roll with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen shown in Figure 3, and its stripping layer detects gained data and shows that hardness can reach 43mm more than or equal to the degree of depth of 90HSD.
(embodiment 6)
All the other are identical with embodiment 1, difference is: then carry out temper after the above-mentioned breaker roll body of roll carries out induced electricity heat treated and water spray cooling process, temper is that roll is heated to 120 ℃, is incubated to place it in after 80 hours to naturally cool to envrionment temperature in the air.
Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to this test roller body of roll with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen shown in Figure 3, and its stripping layer detects gained data and shows that hardness can reach 45mm more than or equal to the degree of depth of 90HSD.
(embodiment 7)
All the other are identical with embodiment 6, and difference is: temper is that roll is heated to 160 ℃, is incubated to place it in after 100 hours to naturally cool to envrionment temperature in the air.
Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to this test roller body of roll with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen shown in Figure 3, and its stripping layer detects gained data and shows that hardness can reach 46mm more than or equal to the degree of depth of 90HSD.
(embodiment 8)
All the other are identical with embodiment 6, and difference is: temper is that roll is heated to 200 ℃, is incubated to place it in after 120 hours to naturally cool to envrionment temperature in the air.
Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to this test roller body of roll with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen shown in Figure 3, and its stripping layer detects gained data and shows that hardness can reach 47mm more than or equal to the degree of depth of 90HSD.
(embodiment 9)
All the other are identical with embodiment 7, difference is: after the above-mentioned breaker roll body of roll carries out induced electricity heat treated and water spray cooling process, before temper handles, after in roll being continued to drop to continuous cold drop, continuing cold 1.5 hours, and then breaker roll carries out the subcooling processing, it is earlier roll to be put into the alcohol pond that subcooling is handled, make roller temperature reduce to subzero 60 ℃ with dry ice, allow it be warming up to envrionment temperature naturally under the envrionment temperature through after 8 hours roll being placed.
Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to this test roller body of roll with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen shown in Figure 3, and its stripping layer detects gained data and shows that hardness can reach 45mm more than or equal to the degree of depth of 90HSD.
(embodiment 10)
All the other are identical with embodiment 9, and difference is: make roller temperature reduce to subzero 90 ℃ with liquid nitrogen, allow it be warming up to envrionment temperature naturally under the envrionment temperature through after 7 hours roll being placed.
Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to this test roller body of roll with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen shown in Figure 3, and its stripping layer detects gained data and shows that hardness can reach 46mm more than or equal to the degree of depth of 90HSD.
(embodiment 11)
All the other are identical with embodiment 9, and difference is: make roller temperature reduce to subzero 120 ℃ with liquid nitrogen, allow it be warming up to envrionment temperature naturally under the envrionment temperature through after 6 hours roll being placed.
Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to this test roller body of roll with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen shown in Figure 3, and its stripping layer detects gained data and shows that hardness can reach 46mm more than or equal to the degree of depth of 90HSD.
(embodiment 12)
All the other are identical with embodiment 9, and difference is: breaker roll carries out thermal pretreatment before the breaker roll body of roll carries out the induced electricity heat treated, and it is that roll is heated to 250 ℃ that breaker roll carries out thermal pretreatment, and is incubated 24 hours; And then then breaker roll carries out the induced electricity heat treated.
Take the method for degree of depth stripping layer that its quench-hardened case is detected to this roller body, its region of anatomy synoptic diagram is seen shown in Figure 3, and it is that the hardness of quench-hardened case and the related data of the degree of depth are seen Fig. 4 that its stripping layer detects the gained top layer.Ordinate zou is the HSD data among Fig. 4, and X-coordinate is stripping layer depth data.As shown in Figure 4, hardness more than or equal to the degree of depth of 90HSD at 50mm.
(embodiment 13)
All the other are identical with embodiment 10, and difference is: breaker roll carries out thermal pretreatment before the breaker roll body of roll carries out the induced electricity heat treated, and it is that roll is heated to 300 ℃ that breaker roll carries out thermal pretreatment, and is incubated 24 hours; And then then breaker roll carries out the induced electricity heat treated.
Take the method for degree of depth stripping layer that its quench-hardened case is detected to this roller body, its region of anatomy synoptic diagram is seen shown in Figure 3, its stripping layer detect gained data show hardness more than or equal to the degree of depth of 90HSD at 51mm.
(embodiment 14)
All the other are identical with embodiment 11, and difference is: breaker roll carries out thermal pretreatment before the breaker roll body of roll carries out the induced electricity heat treated, and it is that roll is heated to 350 ℃ that breaker roll carries out thermal pretreatment, and is incubated 25 hours; And then then breaker roll carries out the induced electricity heat treated.
Take the method for degree of depth stripping layer that its quench-hardened case is detected to this roller body, its region of anatomy synoptic diagram is seen shown in Figure 3, its stripping layer detect gained data show hardness more than or equal to the degree of depth of 90HSD at 51mm.
Used roll is with traditional power frequency, intermediate frequency dual inductor electrical heating process manufacturing quench-hardened case the time among the embodiment 1 to embodiment 14, even it is carried out after the series of optimum technologies such as preheating, deep cooling, tempering, still can only make the darkest dark effective quench-hardened case of 25mm that is at the body of roll; And employing the inventive method then can make the darkest effective quench-hardened case of 51mm that is, this shows that the inventive method can obtain very excellent effect.
(embodiment 15)
Present embodiment adopt in making cold roll 5 processes expand hydrogen processing, machining, operation such as modified through smelting, esr, blank forging, nodularization after resulting cold roll 5 roller stocks be the test roller, its shape is seen Fig. 1, its roll body length is that a is 1450mm, roll diameter is 420mm, the A end is the sling end of cold roll 5 when induced electricity heats for roll, and the chemical ingredients of its used material sees Table 2.
Table 2
| C | Si | Mn | P | S | Cr | Ni | Mo | V | All the other are Fe and unavoidable impurities |
| 0.82～ 0.90 | 0.50 ～ 0.80 | 0.20～ 0.50 | ≤ 0.020 | ≤ 0.015 | 2.80～ 3.20 | 0.60 ～ 0.80 | 0.40～ 0.60 | 0.05～ 0.15 |
The method that present embodiment is made quench-hardened case at the test roller body of roll is identical with embodiment 1, and difference is: the temperature in the first line-frequency induction device 1 and the second line-frequency induction device, 2 heating zone is the A of roller body material
C1Above 30 ℃～50 ℃ of transformation temperature in the present embodiment is 880 ℃; Temperature in the heating zone of intermediate frequency inductor 3 is the A of roller body material
C1Above 80 ℃～100 ℃ of transformation temperature, present embodiment is 920 ℃.
Make after the quench-hardened case, is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to this test roller body of roll with grinding machine grinding successively, the B place is stripping layer position, and its stripping layer synoptic diagram is seen shown in Figure 5, and the stripping layer detects the gained data and shows that hardness can reach 25mm more than or equal to the degree of depth of 90HSD.
(embodiment 16)
All the other are identical with embodiment 15, and difference is: the temperature in the first line-frequency induction device 1 and the second line-frequency induction device, 2 heating zone is 900 ℃; Temperature in the heating zone of intermediate frequency inductor 3 is 930 ℃.
Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to the roller body that makes quench-hardened case with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen Fig. 5, and the stripping layer detects gained data and shows that hardness can reach 28mm more than or equal to the degree of depth of 90HSD.
(embodiment 17)
All the other are identical with embodiment 15, and difference is: the temperature in the first line-frequency induction device 1 and the second line-frequency induction device, 2 heating zone is 920 ℃; Temperature in the heating zone of intermediate frequency inductor 3 is 950 ℃.Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to the roller body that makes quench-hardened case with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen Fig. 5, and the stripping layer detects gained data and shows that hardness can reach 28mm more than or equal to the degree of depth of 90HSD.
(embodiment 18)
All the other are identical with embodiment 16, and difference is: breaker roll carries out thermal pretreatment before the breaker roll body of roll carries out the induced electricity heat treated, and it is that roll is heated to 220 ℃ earlier that breaker roll carries out thermal pretreatment, and is incubated 4 hours; Then roll is heated to 300 ℃, and be incubated 12 hours, and then then breaker roll carries out the induced electricity heat treated.
Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to the roller body that makes quench-hardened case with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen Fig. 5, and the stripping layer detects gained data and shows that hardness can reach 28mm more than or equal to the degree of depth of 90HSD.
(embodiment 19)
All the other are identical with embodiment 18, and difference is: it is that roll is heated to 250 ℃ earlier that breaker roll carries out thermal pretreatment, and is incubated 4 hours; Then roll is heated to 350 ℃, and be incubated 20 hours, and then then breaker roll carries out the induced electricity heat treated.
Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to the roller body that makes quench-hardened case with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen Fig. 5, and the stripping layer detects gained data and shows that hardness can reach 28mm more than or equal to the degree of depth of 90HSD.
(embodiment 20)
All the other are identical with embodiment 16, difference is: then carry out temper after the breaker roll body of roll carries out induced electricity heat treated and water spray cooling process, temper is that roll is heated to 140 ℃, is incubated to place it in after 72 hours to naturally cool to envrionment temperature in the air.Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to the roller body that makes quench-hardened case with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen Fig. 5, and the stripping layer detects gained data and shows that hardness can reach 29mm more than or equal to the degree of depth of 90HSD.
(embodiment 21)
All the other are identical with embodiment 20, and difference is: temper is that roll is heated to 180 ℃, is incubated to place it in after 72 hours to naturally cool to envrionment temperature in the air.Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to the roller body that makes quench-hardened case with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen Fig. 5, and the stripping layer detects gained data and shows that hardness can reach 28mm more than or equal to the degree of depth of 90HSD.
(embodiment 22)
All the other are identical with embodiment 20, and difference is: temper is that roll is heated to 190 ℃, is incubated to place it in after 80 hours to naturally cool to envrionment temperature in the air.Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to the roller body that makes quench-hardened case with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen Fig. 5, and the stripping layer detects gained data and shows that hardness can reach 30mm more than or equal to the degree of depth of 90HSD.
(embodiment 23)
All the other are identical with embodiment 21, difference is: after the above-mentioned breaker roll body of roll carries out induced electricity heat treated and water spray cooling process, before temper handles, after in roll being continued to drop to continuous cold drop, continuing cold 1.5 hours, and then breaker roll carries out the subcooling processing, it is earlier roll to be put into the alcohol pond that subcooling is handled, make roller temperature reduce to subzero 60 ℃ with dry ice, allow it be warming up to envrionment temperature naturally under the envrionment temperature through after 8 hours roll being placed.Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to the roller body that makes quench-hardened case with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen Fig. 5, and the stripping layer detects gained data and shows that hardness can reach 28mm more than or equal to the degree of depth of 90HSD.
(embodiment 24)
All the other are identical with embodiment 23, and difference is: make roller temperature reduce to subzero 80 ℃ with liquid nitrogen, allow it be warming up to envrionment temperature naturally under the envrionment temperature through after 5 hours roll being placed.Make the method for quench-hardened case with embodiment 10 at this test roller body of roll, is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to the roller body that makes quench-hardened case with grinding machine grinding successively, its region of anatomy synoptic diagram is seen Fig. 5, and the stripping layer detects the gained data and shows that hardness can reach 30mm more than or equal to the degree of depth of 90HSD.
(embodiment 25)
All the other are identical with embodiment 23, and difference is: make roller temperature reduce to subzero 100 ℃ with liquid nitrogen, allow it be warming up to envrionment temperature naturally under the envrionment temperature through after 4 hours roll being placed.Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to the roller body that makes quench-hardened case with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen Fig. 5, and the stripping layer detects gained data and shows that hardness can reach 30mm more than or equal to the degree of depth of 90HSD.
(embodiment 26)
All the other are identical with embodiment 24, and difference is: breaker roll carries out thermal pretreatment before the breaker roll body of roll carries out the induced electricity heat treated, and it is that roll is heated to 220 ℃ that breaker roll carries out thermal pretreatment, and is incubated 4 hours; Then roll is heated to 300 ℃, and be incubated 12 hours, and then then breaker roll carries out the induced electricity heat treated.Make the method for quench-hardened case with embodiment 12 at this test roller body of roll, is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to the roller body that makes quench-hardened case with grinding machine grinding successively, its region of anatomy synoptic diagram is seen Fig. 5, and the stripping layer detects the gained data and shows that hardness can reach 31mm more than or equal to the degree of depth of 90HSD.
(embodiment 27)
All the other are identical with embodiment 26, and difference is: it is that roll is heated to 230 ℃ that breaker roll carries out thermal pretreatment, and is incubated 5 hours; Then roll is heated to 320 ℃, and be incubated 15 hours, and then then breaker roll carries out the induced electricity heat treated.Is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to the roller body that makes quench-hardened case with grinding machine grinding successively, and its region of anatomy synoptic diagram is seen Fig. 5, the stripping layer detect the gained data show hardness more than or equal to the degree of depth of 90HSD at 32mm.
(embodiment 28)
All the other are identical with embodiment 26, and difference is: it is that roll is heated to 250 ℃ that breaker roll carries out thermal pretreatment, and is incubated 4 hours; Then roll is heated to 350 ℃, and be incubated 20 hours, and then then breaker roll carries out the induced electricity heat treated.Make the method for quench-hardened case with embodiment 14 at this test roller body of roll, is that the method for degree of depth stripping layer detects its depth of hardening zone and hardness to the roller body that makes quench-hardened case with grinding machine grinding successively, its region of anatomy synoptic diagram is seen Fig. 5, and the stripping layer detects the gained data and shows that hardness can reach 30mm more than or equal to the degree of depth of 90HSD.
Used roll is with traditional power frequency, intermediate frequency dual inductor electrical heating process manufacturing quench-hardened case the time among the embodiment 15 to embodiment 28, even it is carried out after the series of optimum technologies such as preheating, deep cooling, tempering, still can only make and be the dark effective quench-hardened case of 25mm to the maximum at the body of roll; And employing the inventive method then can make the darkest effective quench-hardened case of 32mm that is, this shows that the inventive method also can obtain very excellent effect to common material.
Obviously, the above embodiment of the present invention only is for example of the present invention clearly is described, and is not to be qualification to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (15)
1. the manufacture method of a quench hardening layer of cold roll barrel, described roll is formed from steel, elder generation's breaker roll carries out thermal pretreatment, re-use the inductor block breaker roll body of roll and carry out the induced electricity heat treated, again to the roller body surface sprinkling to its cooling process of spraying water, carrying out subcooling then handles, carry out temper at last, thereby make quench-hardened case at roller body, it is characterized in that: it is that roller body is heated by the first low frequency induction device, the second low frequency induction device and intermediate frequency inductor successively that the breaker roll body of roll carries out the induced electricity heat treated.
2. the manufacture method of quench hardening layer of cold roll barrel according to claim 1, it is characterized in that: the frequency of the exchange current that feeds to the first low frequency induction device, the second low frequency induction device is 40Hz～60Hz, and the frequency of the exchange current that feeds to intermediate frequency inductor is 200Hz～300Hz.
3. the manufacture method of quench hardening layer of cold roll barrel according to claim 2, it is characterized in that: making the temperature of roller body in the heating zone of the first low frequency induction device and the second low frequency induction device is the A of roller body material
C1Above 30 ℃～50 ℃ of transformation temperature, the temperature in the heating zone of intermediate frequency inductor are the A of roller body material
C1Above 80 ℃～100 ℃ of transformation temperature; The water that the spray of breaker roll surface is 15 ℃～30 ℃.
4. the manufacture method of quench hardening layer of cold roll barrel according to claim 1, it is characterized in that: temper is that roll is heated to 120 ℃～200 ℃, is incubated to place it in after 80～120 hours to naturally cool to envrionment temperature in the air.
5. the manufacture method of quench hardening layer of cold roll barrel according to claim 1, it is characterized in that: it is to be cooled to subzero 60 ℃～subzero 120 ℃ through the roll after the water spray cooling process that subcooling is handled, and is placed on after being incubated 2～4 hours and naturally cools to envrionment temperature in the air.
6. the manufacture method of quench hardening layer of cold roll barrel according to claim 1, it is characterized in that: the temperature of thermal pretreatment is 250 ℃～350 ℃, and soaking time is 10～28 hours.
7. the manufacture method of quench hardening layer of cold roll barrel according to claim 1, it is characterized in that: the weight percentage of the used alloy composition of cold roll is as described below: C is 0.82%～0.90%, Si is 0.30%～0.55%, Mn is 0.20%～0.50%, Cr is 4.90%～5.40%, and Ni is 0.30%～0.50%, and Mo is 0.20%～0.40%, V is 0.10%～0.20%, and all the other are Fe and unavoidable impurities.
8. the manufacture method of quench hardening layer of cold roll barrel according to claim 7, it is characterized in that: the described first low frequency induction device is the first line-frequency induction device, the second low frequency induction device is the second line-frequency induction device.
9. the manufacture method of quench hardening layer of cold roll barrel according to claim 8 is characterized in that: the frequency of the exchange current that feeds to intermediate frequency inductor is 250Hz.
10. the manufacture method of quench hardening layer of cold roll barrel according to claim 9 is characterized in that: it is that to make the temperature of roller body in the first line-frequency induction device and the second line-frequency induction device heating zone be 860 ℃～960 ℃, the temperature in the intermediate frequency inductor heating zone is 940 ℃～980 ℃ that the breaker roll body of roll carries out the induced electricity heat treated; The water that the spray of breaker roll surface is 15 ℃～30 ℃.
11. the manufacture method of quench hardening layer of cold roll barrel according to claim 10, it is characterized in that: in the induced electricity heating installation, set gradually the first line-frequency induction device, the second line-frequency induction device, intermediate frequency inductor, water-jet, continuous cold drop from the top down, wherein the level interval of roller body and the first line-frequency induction device be 12mm～62mm, with the level interval of the second line-frequency induction device be 20mm～75mm, and the level interval of intermediate frequency inductor be 20mm～75mm; The vertical spacing that makes the first line-frequency induction device and the second line-frequency induction device is that the vertical spacing of 10mm～65mm, the second line-frequency induction device and intermediate frequency inductor is that the vertical spacing of 10mm～65mm, intermediate frequency inductor and water-jet is 10mm～65mm; Make roll in lathe on one side the speed with 0.3mm/s～1.5mm/s vertically descend, on one side with the speed rotation of 40rad/min～360rad/min.
12. the manufacture method of quench hardening layer of cold roll barrel according to claim 11, it is characterized in that: when the lower rim of roller body stretches into the first line-frequency induction device 10mm～20mm, beginning is switched on to inductor block, when the lower rim of roller body stretched into water-jet 10mm～20mm, water-jet began the water of 15 ℃～30 ℃ of part roller body sprays in stretching into water-jet; When the upper limb of roller body leaves the second line-frequency induction device, stop to the first line-frequency induction device and the power supply of the second line-frequency induction device; When the upper limb of roller body drops to apart from intermediate frequency inductor lower rim 10mm～20mm, is the body of roll when also having 10mm～20mm in intermediate frequency inductor, stop to power to intermediate frequency inductor; Roll is continued to drop in the continuous cold drop continuous cold 1 to 2 hours.
13. the manufacture method of quench hardening layer of cold roll barrel according to claim 12 is characterized in that: it is that roll is heated to 250 ℃～350 ℃ that breaker roll carries out thermal pretreatment, and is incubated 23 hours to 25 hours; It is that roller temperature is reduced to subzero 60 ℃～subzero 120 ℃ that breaker roll carries out that subcooling handles, and roll is placed to allow it be warming up to envrionment temperature naturally under the envrionment temperature after 6 to 8 hours; It is that roller temperature is heated to 100 ℃～200 ℃ that breaker roll carries out temper, roll is placed under the envrionment temperature to allow it naturally cool to envrionment temperature then.
14. the manufacture method of quench hardening layer of cold roll barrel according to claim 13 is characterized in that: it is that roll is put into the alcoholic medium pond that breaker roll carries out the subcooling processing, lowers the temperature with dry ice or liquid nitrogen breaker roll.
15. the manufacture method of quench hardening layer of cold roll barrel according to claim 14, it is characterized in that: the soaking time that breaker roll carries out temper is theoretical tempering time, method of calculation are: roll diameter is x centimetre, and theoretical tempering time is 1.5x～2.5x hour.
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| CN102620701B (en) * | 2011-06-30 | 2014-04-02 | 宝钢轧辊科技有限责任公司 | Method for measuring depth of roller body hardening layer |
| CN102618710A (en) * | 2012-04-17 | 2012-08-01 | 本溪市溪钢工矿设备有限公司 | Method for reconstructing scrapped cold roll into qualified cold roll |
| CN104032103A (en) * | 2014-05-12 | 2014-09-10 | 宜兴市永昌轧辊有限公司 | Heat treatment method for superdeep-hardening-layer cold roll and quenching equipment employed during heat treatment |
| CN104032117B (en) * | 2014-05-12 | 2016-09-14 | 宜兴市永昌轧辊有限公司 | A kind of heat treatment method of ultrahigh hardness non-ferrous metal cold roll |
| CN105063285B (en) * | 2015-07-25 | 2017-09-01 | 宜兴市永昌轧辊有限公司 | A kind of roll induction hardening process method |
| CN105349737A (en) * | 2015-11-16 | 2016-02-24 | 中钢集团邢台机械轧辊有限公司 | Double-frequency triple-effect induction quenching process for cold roll |
| CN105483354B (en) * | 2015-12-23 | 2017-09-29 | 中钢集团邢台机械轧辊有限公司 | The heat treatment method of large high-speed steel cold roll |
| CN109536696A (en) * | 2018-12-10 | 2019-03-29 | 宜兴市永昌轧辊有限公司 | A kind of tempering process of New Type of Cold Roller |
| CN109593946B (en) * | 2018-12-29 | 2020-06-16 | 宝钢轧辊科技有限责任公司 | Method for controlling hardness and hardening layer of intermediate roll body end of HC six-roll mill |
| CN112391582B (en) * | 2020-11-18 | 2022-01-18 | 宝钢轧辊科技有限责任公司 | Ultra-deep quench hardening layer forged steel cold rolling working roll and manufacturing method thereof |
| CN115232951B (en) * | 2022-07-21 | 2024-03-01 | 中冶陕压重工设备有限公司 | Method for reserving soft belt in induction quenching process of H11 steel straightening roller |
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