CN2928867Y - Roller bottom type parallel waste heat utilizing continuous annealing furnace - Google Patents

Roller bottom type parallel waste heat utilizing continuous annealing furnace Download PDF

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Publication number
CN2928867Y
CN2928867Y CN 200620102515 CN200620102515U CN2928867Y CN 2928867 Y CN2928867 Y CN 2928867Y CN 200620102515 CN200620102515 CN 200620102515 CN 200620102515 U CN200620102515 U CN 200620102515U CN 2928867 Y CN2928867 Y CN 2928867Y
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China
Prior art keywords
stove
roller
loading bay
furnace
discharge pedestal
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Expired - Lifetime
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CN 200620102515
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Chinese (zh)
Inventor
范本良
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JINZHOU TECHNOLOGY Co Inc
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Individual
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Abstract

The utility model discloses a roller hearth continuous annealing furnace for paralleling residual heat utilization, which comprises a first loading bay, a first discharging bay, a second loading bay, a second discharging bay, a roller hearth furnace, and a transmission system or the like, wherein the roller hearth furnace is provided with a heat insulation layer for dividing a portion of the roller hearth furnace into an upper layer and a lower layer of the furnace, and the double layers simultaneously make heat treatment for metal, thereby improving the output of the furnace, reducing the length of the device and accommodation area, and simultaneously reducing about 1/3 of heat dissipation area of the furnace surface, the upper and lower work pieces move oppositely, realizing the residual heat utilization of the work pieces, thereby greatly improving availability ratio of energy resource. A plurality of loading bay idlers, discharging bay idlers and furnace insider idlers with transversely rotating are separately arranged in the loading bay, the discharging bay and the roller hearth furnace, which through the transmission system drive the idlers continuously rotating, thereby making the work pieces of the idler move along constantly. As a result, no fixed contact point is arranged between the work pieces and the idlers, the work pieces has the advantages of uniform heating with no injury, less deformation, and high heating efficiency inside the furnace .

Description

The parallel UTILIZATION OF VESIDUAL HEAT IN continuous annealing furnace of roller bottom type
[technical field]
The utility model relates to metal heat treatmet, relates in particular to metal heat treatmet equipment.
[background technology]
Metal heat treatmet is metal works to be placed on be heated to suitable temperature in certain medium, and after in this temperature, keeping certain hour, again with a kind of technology of friction-motion speed refrigerative.Metal heat treatmet is one of important process in the machinofacture, compare with other complete processings, thermal treatment does not generally change the shape and the whole chemical ingredients of workpiece, but by changing the microstructure of workpiece inside, or change the chemical ingredients of workpiece surface, give or improve the use properties of workpiece.Be characterized in improving the inner quality of workpiece, and this generally not to be naked eyes can see.For making metal works have needed mechanical property, physicals and chemical property, except that reasonable select materials and various forming technology, thermal treatment process is requisite often.Iron and steel is a material most widely used in the mechanical industry, and the microstructure of iron and steel complexity can be controlled by thermal treatment, so the thermal treatment of iron and steel is the main contents of metal heat treatmet.In addition, aluminium, copper, magnesium, titanium etc. and alloy thereof also can change its mechanics, physics and chemical property by thermal treatment, to obtain different use propertieies.
Thermal treatment process generally comprises heating, insulation, three processes of cooling, has only two processes of heating and cooling sometimes.These processes overlap, and can not be interrupted.Heating is one of heat treated important procedure.The heating means of metal heat treatmet are a lot, are the earliest to adopt charcoal and coal as thermal source, and then using liquid and geseous fuel.The application of electricity makes heating be easy to control and non-environmental-pollution.Utilize these thermals source can direct heating, also can pass through fused salt or metal, so that the particle that floats carries out indirect heating.During METAL HEATING PROCESS, workpiece is exposed in the air, and oxidation, decarburization (being that the steel-iron components carbon contents reduces) usually take place, this for thermal treatment after the surface property of part very adverse influence is arranged.Thereby metal usually should be in controlled atmosphere or protective atmosphere, in the melting salt and heat in the vacuum, also available coating or Packaging Method are protected heating.Heating temperature is one of important technical parameter of thermal treatment process, selects and the control Heating temperature, and be the subject matter that guarantees thermal treatment quality.Heating temperature is different and different with heat treated purpose with processed metallic substance, but generally all is to be heated to more than the transformation temperature, to obtain high temperature microstructure.Changing in addition needs the regular hour, therefore when the metal works surface meets the requirements of Heating temperature, also must keep certain hour in this temperature, makes the internal and external temperature unanimity, and microstructure is changed fully, is called soaking time during this period of time.When adopting high-energy-density heating and surface heat to handle, rate of heating is exceedingly fast, and generally just do not have soaking time, and the soaking time of thermo-chemical treatment is often longer.Cooling also is an indispensable step in the heat treatment process, and method of cooling mainly is a controlled chilling speed because of technology is different.General annealed speed of cooling is the slowest, and the speed of cooling of normalizing is very fast, and the speed of cooling of quenching is faster.But go back invar kind difference and different requirements is arranged, for example empty hard steel just can harden with the same speed of cooling of normalizing.Metal heat treatmet technology can be divided into complete heat treatment substantially, surface heat is handled and the thermo-chemical treatment three major types.Different according to heating medium, Heating temperature and method of cooling, each big class can be divided into some different thermal treatment process again.Adopt different thermal treatment process with a kind of metal, can obtain different tissues, thereby have different performances.
Complete heat treatment is to the whole workpiece heating, then with suitable speed cooling, to change the metal heat treatmet technology of its whole mechanical property.The iron and steel complete heat treatment roughly has annealing, normalizing, quenching and four kinds of basic technologies of tempering.
Annealing is that workpiece is heated to proper temperature, adopt different soaking times according to material and workpiece size, slowly cool off then, purpose is the metal inside tissue to be reached or near equilibrium state, obtaining favorable manufacturability energy and use properties, perhaps is further to quench to do to organize to prepare.Normalizing is to cool off in air after workpiece is heated to suitable temperature, and the effect of normalizing is similar with annealing, and organizing of just obtaining is thinner, is usually used in improving the cutting ability of material, also is used for the part conduct final thermal treatment not high to ask for something sometimes.
Metallic heat treating furnace is to be used for equipment that metal is heat-treated, mainly is divided into flame furnace and electric furnace two classes by heat-supplying mode.Flame furnace also claims Fuel Furnace, is with solid, liquid or the geseous fuel heat output in stove workpiece to be heated; Electric furnace is in stove electric energy to be converted into heat workpiece is heated.The fuel source of flame furnace is wide, and price is low, is convenient to suit measures to local conditions to take different structures, helps reducing productive expense.To be that furnace temperature is all even be convenient to realize automatic control to the characteristics of electric furnace, and heating quality is good.By the energy transformation mode, electric furnace can be divided into resistance furnace, induction furnace and electric arc furnace again.
Metallic heat treating furnace can be divided into periodic and continous way two classes again by thermal regulation.The periodic stove claims the discontinuous stove again, and stove is interrupted to be produced, and furnace temperature changes in each heating period, mainly contains box-type furnace, Bogie hearth furnace, pit furnace etc.; Continuous furnace is the stove continuous production, divides temperature section in the burner hearth.The temperature of each section is constant in heat-processed, and workpiece progressively enters the pyritous heating zone by cryogenic preheating zone, mainly contains ring furnace, walking beam furnace, push rod furnace etc.
The flame furnace direct heating, rate of heating is fast, is difficult to realize accurate control, and the temperature control tolerance range is not high, and workpiece is had relatively high expectations to the temperature temperature control from being incubated to when cooling off, and it is low excessively to be prone to overtemperature and temperature, and environmental pollution is serious, and thermo-efficiency is lower, and the quality instability.The periodic stove carries out heating and cooling simultaneously with chassis, process furnace and workpiece, and body of heater accumulation of heat loss is big.Heat that absorbs during METAL HEATING PROCESS and the ratio that infeeds the heat in the stove are called furnace thermal efficiency.Continuous furnace is than the thermo-efficiency height of discontinuous stove, because the productivity height of continuous furnace, and be uninterrupted duty, the stove thermal system is in steady state, there is not periodic body of heater accumulation of heat loss, also because there is the section of a preheating furnace charge burner hearth inside, the flue gas part of waste heat is absorbed by the cold workpiece into stove, has reduced the temperature from kiln gas.
Present continuous ovens such as push rod furnace are to rely on pushing device with gap the charging tray and the workpiece that are placed on the track to be pushed in the stove, push away one by one of the charging tray in the stove, travel forward.Batch is big; The push rod continuous oven has also heated charging tray simultaneously at heated parts, and energy consumption is higher; The quantity of charging tray can not be too many, and process cycle is longer; The microstructure scattered error is bigger in the same stove, the product lack of homogeneity; Oxidation and decarbonization is serious; Labor intensity is big.Simultaneously, present stove is individual layer, and output is lower, and equipment is longer, and floor space is bigger, and the upper wall and the lower wall of body of heater dispel the heat simultaneously, and the workpiece waste heat is not fully utilized, and energy consumption is bigger.
So, if the structure of heat treatment furnace is rationally improved, make its thermal effectiveness good, floor space is less, and the workpiece waste heat energy accesses and makes full use of, thereby improves the important topic that energy utilization rate becomes the metal heat treatmet industry research.
[summary of the invention]
The purpose of this utility model solves the problems of the prior art exactly, proposes the parallel UTILIZATION OF VESIDUAL HEAT IN continuous annealing furnace of a kind of roller bottom type, and thermal effectiveness is good, and floor space is little, can make full use of the workpiece waste heat.
For achieving the above object, the utility model proposes the parallel UTILIZATION OF VESIDUAL HEAT IN continuous annealing furnace of a kind of roller bottom type, comprise first loading bay and first discharge pedestal, also comprise stove at the bottom of the roller, second loading bay and second discharge pedestal, be provided with thermofin in the stove at the bottom of the described roller, thermofin with roller at the bottom of the part of stove be separated into stove upper strata and stove lower floor, one end of stove lower floor is first loading bay, the other end is first discharge pedestal, and an end on stove upper strata is second discharge pedestal, and the other end is second loading bay.
As preferably, also comprise transmission system, be provided with lower floor's carrying roller in some stoves at the bottom of the roller in the stove lower floor of stove, be provided with upper strata carrying roller in some stoves in the stove upper strata, transmission system comprises motor and transmission mechanism, transmission mechanism is arranged at the bottom of the roller in the stove, and motor is connected on the transmission mechanism, in the stove in lower floor's carrying roller and the stove upper strata carrying roller be arranged on the transmission mechanism.
As preferably, first loading bay is provided with some first loading bay carrying rollers, first discharge pedestal is provided with some first discharge pedestal carrying rollers, second loading bay is provided with some second loading bay carrying rollers, second discharge pedestal is provided with some second discharge pedestal carrying rollers, also be respectively arranged with transmission mechanism on first loading bay, first discharge pedestal, second loading bay, second discharge pedestal, the first loading bay carrying roller, the first discharge pedestal carrying roller, the second loading bay carrying roller and the second discharge pedestal carrying roller are separately positioned on the transmission mechanism.
As preferably, at the bottom of the roller in the stove stove upper strata and stove lower floor be respectively arranged with temperature control indirect cooling device in some stoves.
As preferably, stove is divided into heat exchange zone, temperature control heat exchange zone, a plurality of sections such as independent temperature control district up and down at the bottom of the roller, is provided with the subregion insulated wall between each section.
As preferably, each section is provided with some radiator tubes, adopts full electrically heated.
As preferably, transmission system also comprises the variable frequency adjustment device, links to each other with motor, is used for realizing the stepless time adjustment of workpiece walking speed.
The beneficial effects of the utility model: the utility model is provided with thermofin in stove at the bottom of the roller, the part of stove at the bottom of the roller is separated into stove upper strata and stove lower floor, bilayer is heat-treated metal simultaneously, improve the output of stove, reduced the length of equipment, reduced floor space, reduce body of heater surface radiating area about 1/3 simultaneously, and double-deck up and down workpiece work is oppositely mobile, realizes the workpiece UTILIZATION OF VESIDUAL HEAT IN, thereby has improved rate of energy greatly; Carrying roller in loading bay carrying roller, discharge pedestal carrying roller and the stove of some horizontal rotations is set respectively in stove at the bottom of loading bay, discharge pedestal, the roller, driving above-mentioned carrying roller by transmission system rotates continuously, thereby the workpiece on the carrying roller is constantly moved forward, like this, there is not the fixed point of contact between workpiece and the roller-way, workpiece is heated evenly, nothing is damaged, be out of shape for a short time, simultaneously because carrying roller stove internal rotation at the bottom of roller all the time in the stove, heat energy loss is less relatively, thermo-efficiency height in the stove, simultaneously do not need artificial pusher, significantly reduced labour intensity, and improved efficiency; Temperature control indirect cooling device in some stoves is set in the stove, has improved the speed of cooling of workpiece in stove and cooling precision; The subregion insulated wall is set between each section, has reduced the temperature effect between section and the section, improved temperature-controlled precision, reduced energy consumption; Each section is provided with some radiator tubes, adopts full electrically heated; Also be provided with step-down gear and variable frequency adjustment device in the transmission system,, and realized the stepless time adjustment of workpiece walking speed for workpiece movement provides rational speed.
Feature of the present utility model and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
[description of drawings]
Fig. 1 is the structural representation of the parallel UTILIZATION OF VESIDUAL HEAT IN continuous annealing furnace of the utility model roller bottom type.
[embodiment]
Be illustrated in figure 1 as the structural representation of the parallel UTILIZATION OF VESIDUAL HEAT IN continuous annealing furnace of the utility model roller bottom type.Comprise first loading bay 1 and first discharge pedestal 3, also comprise stove 2 at the bottom of the roller, second loading bay 4 and second discharge pedestal 5, be provided with thermofin 21 at the bottom of the described roller in the stove 2, thermofin 21 is separated into stove upper strata and stove lower floor with the part of stove at the bottom of the roller 2, one end of stove lower floor is first loading bay 1, the other end is first discharge pedestal 3, and an end on stove upper strata is second discharge pedestal 5, and the other end is second loading bay 4.Also comprise transmission system 6, be provided with lower floor's carrying roller 22 in some stoves at the bottom of the roller in the stove lower floor of stove 2, be provided with upper strata carrying roller 23 in some stoves in the stove upper strata, transmission system 6 comprises motor 61 and transmission mechanism 62, transmission mechanism 62 is arranged at the bottom of the roller in the stove 2, motor 61 is connected on the transmission mechanism 62, and the interior upper strata of lower floor's carrying roller 22 and stove carrying roller 23 is arranged on the transmission mechanism 62 in the stove.First loading bay 1 is provided with some first loading bay carrying rollers 11, first discharge pedestal 3 is provided with some first discharge pedestal carrying rollers 31, second loading bay 4 is provided with some second loading bay carrying rollers 41, second discharge pedestal 5 is provided with some second discharge pedestal carrying rollers 51, also being respectively arranged with transmission mechanism 62, the first loading bay carrying rollers 11, the first discharge pedestal carrying roller 31, the second loading bay carrying roller 41 and the second discharge pedestal carrying roller 51 on first loading bay 1, first discharge pedestal 3, second loading bay 4, second discharge pedestal 5 is separately positioned on the transmission mechanism 62.Respectively workpiece is placed on the first loading bay carrying roller 11 and the second loading bay carrying roller 41 during metal heat treatmet, open transmission system 6 and drive the first loading bay carrying roller 11 and 41 rotations of the second loading bay carrying roller, respectively workpiece is sent at the bottom of the roller in the stove in the stove 2 in the lower floor's carrying roller 22 and stove on the upper strata carrying roller 23 by the rotation of the first loading bay carrying roller 11 and the second loading bay carrying roller 41, equally, because the rotation of upper strata carrying roller 23 in lower floor's carrying roller 22 and the stove in the stove, workpiece constantly moves forward on the upper strata carrying roller 23 in lower floor's carrying roller 22 and the stove in stove, handle respectively through each section in the stove 2 at the bottom of the roller, and finally move to respectively on first discharge pedestal 3 and second discharge pedestal 5.Bilayer is heat-treated metal simultaneously up and down, improved the output of stove, reduced the length of equipment, reduced floor space, reduce body of heater surface radiating area about 1/3 simultaneously, and double-deck up and down workpiece work is oppositely mobile, realizes the workpiece UTILIZATION OF VESIDUAL HEAT IN, thereby has improved rate of energy greatly; Do not have the fixed point of contact between workpiece and the roller-way, workpiece is heated evenly, and nothing is damaged, and is out of shape for a short time, does not need artificial pusher again, has reduced labour intensity, has improved efficiency.
Stove 2 interior stove upper stratas and stove lower floor are respectively arranged with temperature control indirect cooling device 26 in some stoves at the bottom of the roller.According to the heat treatment of workpieces requirement, arranging in the zone that rationally heat-eliminating medium with the speed of cooling of raising workpiece in stove and cooling precision, thereby reaches high-yield high-quality by the cooling pipe racks heat of cloth in stove.
Be divided into heat exchange zone I, temperature control heat exchange zone II, a plurality of sections such as independent temperature control district III up and down at the bottom of the roller in the stove 2, in order to reduce the temperature effect between section and the section, the raising temperature-controlled precision also cuts down the consumption of energy, be provided with subregion insulated wall 25 between each section, the quantity of section and front and back order can suitably be adjusted and reasonable Arrangement according to heat treatment requirements.Each section is provided with some radiator tubes 24, adopts full electrically heated, and radiator tube 24 can rationally distribute up and down according to the concrete heat treatment requirements of workpiece, makes furnace temperature even.
Transmission system 6 also comprises step-down gear and variable frequency adjustment device, all links to each other with motor 61, and step-down gear is regulated the output speed of motor 41, and the variable frequency adjustment device is used for realizing the stepless time adjustment of workpiece walking speed.
At the bottom of roller, adopt refractory insulating layer 27 around the burner hearth of stove 2, to guarantee that temperature loss is less in the stove.
The utility model can be used for the annealing and the normalizing treatment of metal heat treatmet.Not only be applicable to large-scale workpiece, and can be to adorning the basket processing than small workpiece and irregular workpiece.
Above-mentioned embodiment is to further specify of the present utility model, is not to concrete qualification of the present utility model, and any simple transformation to the utility model structure all belongs to protection domain of the present utility model.

Claims (7)

1. the parallel UTILIZATION OF VESIDUAL HEAT IN continuous annealing furnace of roller bottom type, comprise first loading bay (1) and first discharge pedestal (3), it is characterized in that: also comprise stove (2) at the bottom of the roller, second loading bay (4) and second discharge pedestal (5), be provided with thermofin (21) in the stove at the bottom of the described roller (2), stove upper strata and stove lower floor that thermofin (21) is separated into the part of stove at the bottom of the roller (2), one end of stove lower floor is first loading bay (1), the other end is first discharge pedestal (3), one end on stove upper strata is second discharge pedestal (5), and the other end is second loading bay (4).
2. the parallel UTILIZATION OF VESIDUAL HEAT IN continuous annealing furnace of roller bottom type as claimed in claim 1, it is characterized in that: also comprise transmission system (6), be provided with lower floor's carrying roller (22) in some stoves in the stove lower floor of stove at the bottom of the roller (2), be provided with upper strata carrying roller (23) in some stoves in the stove upper strata, transmission system (6) comprises motor (61) and transmission mechanism (62), transmission mechanism (62) is arranged at the bottom of the roller in the stove (2), motor (61) is connected on the transmission mechanism (62), and the interior upper strata carrying roller (23) of lower floor's carrying roller (22) and stove is arranged on the transmission mechanism (62) in the stove.
3. the parallel UTILIZATION OF VESIDUAL HEAT IN continuous annealing furnace of roller bottom type as claimed in claim 2, it is characterized in that: first loading bay (1) is provided with some first loading bay carrying rollers (11), first discharge pedestal (3) is provided with some first discharge pedestal carrying rollers (31), second loading bay (4) is provided with some second loading bay carrying rollers (41), second discharge pedestal (5) is provided with some second discharge pedestal carrying rollers (51), first loading bay (1), first discharge pedestal (3), second loading bay (4), also be respectively arranged with transmission mechanism (62) on second discharge pedestal (5), the first loading bay carrying roller (11), the first discharge pedestal carrying roller (31), the second loading bay carrying roller (41) and the second discharge pedestal carrying roller (51) are separately positioned on the transmission mechanism (62).
4. the parallel UTILIZATION OF VESIDUAL HEAT IN continuous annealing furnace of roller bottom type as claimed in claim 3 is characterized in that: stove at the bottom of the roller (2) interior stove upper strata and stove lower floor are respectively arranged with temperature control indirect cooling device (26) in some stoves.
5. the parallel UTILIZATION OF VESIDUAL HEAT IN continuous annealing furnace of roller bottom type as claimed in claim 3, it is characterized in that: stove at the bottom of the roller (2) is divided into heat exchange zone (I), temperature control heat exchange zone (II), independent temperature control district a plurality of sections such as (III) up and down, is provided with subregion insulated wall (25) between each section.
6. the parallel UTILIZATION OF VESIDUAL HEAT IN continuous annealing furnace of roller bottom type as claimed in claim 5 is characterized in that: each section is provided with some radiator tubes (24), adopts full electrically heated.
7. as the parallel UTILIZATION OF VESIDUAL HEAT IN continuous annealing furnace of any one described roller bottom type in claim 2 or 3 or 4 or 5 or 6, it is characterized in that: transmission system (6) also comprises the variable frequency adjustment device, links to each other with motor (61), is used for realizing the stepless time adjustment of workpiece walking speed.
CN 200620102515 2006-04-10 2006-04-10 Roller bottom type parallel waste heat utilizing continuous annealing furnace Expired - Lifetime CN2928867Y (en)

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Application Number Priority Date Filing Date Title
CN 200620102515 CN2928867Y (en) 2006-04-10 2006-04-10 Roller bottom type parallel waste heat utilizing continuous annealing furnace

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Application Number Priority Date Filing Date Title
CN 200620102515 CN2928867Y (en) 2006-04-10 2006-04-10 Roller bottom type parallel waste heat utilizing continuous annealing furnace

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CN2928867Y true CN2928867Y (en) 2007-08-01

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102041362A (en) * 2010-12-10 2011-05-04 苏州中门子科技有限公司 Isothermal spheroidizing annealing furnace for bearing steels
CN101993985B (en) * 2009-08-14 2013-05-08 王泽民 Constant temperature process equipment and method as well as constant temperature quenching device and method of forge piece waste heat
CN103882197A (en) * 2014-03-24 2014-06-25 浙江三品轴承有限公司 Double-layer intermittent non-oxidation rapid annealing furnace
CN110487073A (en) * 2019-08-28 2019-11-22 佛山市德力泰科技有限公司 A kind of energy-saving non-inductive windings double-layer roller hearth furnace
CN111118262A (en) * 2020-01-06 2020-05-08 杭州晨昇炉业有限公司 Energy-saving double-circuit steel bottle heat treatment production line
CN114381583A (en) * 2021-12-31 2022-04-22 江苏润孚机械轧辊制造有限公司 Heat treatment device for cold rolling roller machining
CN114457226A (en) * 2021-02-26 2022-05-10 杭州众汇工业炉有限公司 Double-layer split roller bottom type annealing furnace

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101993985B (en) * 2009-08-14 2013-05-08 王泽民 Constant temperature process equipment and method as well as constant temperature quenching device and method of forge piece waste heat
CN102041362A (en) * 2010-12-10 2011-05-04 苏州中门子科技有限公司 Isothermal spheroidizing annealing furnace for bearing steels
CN102041362B (en) * 2010-12-10 2013-11-20 苏州中门子科技有限公司 Isothermal spheroidizing annealing furnace for bearing steels
CN103882197A (en) * 2014-03-24 2014-06-25 浙江三品轴承有限公司 Double-layer intermittent non-oxidation rapid annealing furnace
CN103882197B (en) * 2014-03-24 2016-04-27 浙江三品轴承有限公司 A kind of double-deck intermittent type non-oxidation quick anneal oven
CN110487073A (en) * 2019-08-28 2019-11-22 佛山市德力泰科技有限公司 A kind of energy-saving non-inductive windings double-layer roller hearth furnace
CN110487073B (en) * 2019-08-28 2024-05-28 佛山市德力泰科技有限公司 Energy-saving partition-free double-layer roller kiln
CN111118262A (en) * 2020-01-06 2020-05-08 杭州晨昇炉业有限公司 Energy-saving double-circuit steel bottle heat treatment production line
CN114457226A (en) * 2021-02-26 2022-05-10 杭州众汇工业炉有限公司 Double-layer split roller bottom type annealing furnace
CN114381583A (en) * 2021-12-31 2022-04-22 江苏润孚机械轧辊制造有限公司 Heat treatment device for cold rolling roller machining
CN114381583B (en) * 2021-12-31 2023-10-24 江苏润孚机械轧辊制造有限公司 Heat treatment device for cold rolling roller processing

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