CN202705418U

CN202705418U - Inductive quenching processing device of Cr12MoV roller

Info

Publication number: CN202705418U
Application number: CN2012203863574U
Authority: CN
Inventors: 陈枝钧; 路阳
Original assignee: SHANGHAI UNIVERSITY HEAT-TREATMENT Co Ltd
Current assignee: SHANGHAI UNIVERSITY HEAT-TREATMENT Co Ltd
Priority date: 2012-08-06
Filing date: 2012-08-06
Publication date: 2013-01-30
Anticipated expiration: 2022-08-06

Abstract

The utility model provides an inductive quenching processing device of a Cr12MoV roller. According to the inductive quenching processing device, a heating sensor is moved on a part to be quenched of the Cr12MoV roller at a preset speed, heating is carried out at a preset temperature, blended quenching liquid is used for cooling, and a continuous heating quenching method is adopted; and the quenched Cr12MoV roller is straightened, then tempering is carried out according to a preset temperature until the Cr12MoV roller is qualified, and then detection is carried out by a metallographic phase method. A guide sleeve used for transversely positioning the Cr12MoV roller is also provided for the inductive quenching processing device to ensure that the roller is positioned at a heating center, so that the surface hardness and a hardening layer of the roller not only conforms to technical requirements, but also the deformation of the working roller is successfully controlled within a required error precision; and meanwhile, compared with a traditional quenching process, the power consumption of the inductive quenching processing device is extremely low, so that tremendous energy consumption can be saved in actual batch production, and the inductive quenching processing device has an extremely high economic value.

Description

A kind of induction quenching processing unit (plant) of Cr12MoV roll

Technical field

The utility model relates to a kind of metallic substance quenching processing unit (plant), particularly relates to a kind of induction quenching processing unit (plant) of Cr12MoV roll.

Background technology

Roll is the strength member on Steel Mill's rolling mill, and the pressure that produces when utilizing a pair of or one group of roll rolling rolls the stone roller steel.It mainly bears the Dynamic And Static Loads when rolling, the impact of wearing and tearing and temperature variation.The roll kind is a lot, and roll kind commonly used has cast steel roll, grain roll and forging roller three major types at present, also has a small amount of hard alloy roll at bar and shape mill.

The finished product cold roll is the product of high added value, high technology content, in the manufacturing, the hard surfacing of roller body is the operation of most critical, quenching inducer in the induction quenching then is the important tool that realizes this operation, is all necessarieses of qualified roll of production hardness of roll body and quench-hardened case.Induced surface hardening is to utilize electromagnetic induction principle, in the galvanic circle of closure, connect alternating-current and produce alternating magnetic field, make and place its inner ferromagnetic substance surface to produce induced current, its face quickly heats up to more than the stagnation point, realize hard-faced a kind of processing method, and ferromagnetic substance is exactly the roll that needs quenching.

Although the development of the induction hardening process of roll is very fast, since with high content of technology, so in development, still there are many technological deficiencies.For example, as the roll in the steel pony roll of C12MoV Steel Roll and so on footpath, because chrome content is higher, in the induction hardened course of processing, although its hardening capacity is very good, very easily forms larger thermal stresses and structural stress when quenching and cause distorting and close crackle.This is comparatively thorny technical problem, in the foreign language documents such as U.S., day, moral and Chinese literature, induction hardening process about materials is rarely reported, as seen there is great technological gap at present domestic and international C12MoV class Steel Roll induction quenching field, real technical problem for needing to be resolved hurrily at present.

The utility model content

The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of induction quenching processing unit (plant) of Cr12MoV roll, be used for to solve the prior art Steel Roll and quenches and easily form larger thermal stresses and structural stress and cause distorting and close the problem of crackle.

Reach for achieving the above object other relevant purposes, the utility model also provides a kind of induction quenching processing unit (plant) of Cr12MoV roll, comprises that described induction quenching processing unit (plant) comprises at least: board; Upper and lower top, be arranged on the described board, axially the clamping position roll; Heating inductor and cooling bubbler, be arranged on the described board, and be sheathed on described roll, can move up and down at the induction quenching position for the treatment of of described roll, come to adopt the laser heating quench method to process to the described induction quenching position for the treatment of by preset temperature value heating, injection allotment hardening liquid respectively; And orienting sleeve, be sheathed on described roll, can in the horizontal described roll be positioned the thermal center (-tre) that adds of described heating inductor, and described heating inductor is carried out vertical guiding in the process that moves up and down.

Preferably, described heating inductor translational speed on position described to be quenched is 400mm/min, also is provided with the drive unit that drives described upper and lower top rotation on the described board.Described heating inductor and cooling bubbler are circular, are sheathed on to be clamped on the described upper and lower Cr12MoV roll between top.

Induction quenching processing unit (plant) by Cr12MoV roll of the present utility model, can make roller surface hardness reach 62-63HRC, effective case depth 2.8mm, not only hardness and hardened layer meet technical requirements, and the distortion of this working roll also successfully is controlled in the 0.5mm of requirement.Simultaneously, the Cr12MoV roll of specification of the same race, adopt every of traditional integral quenching to consume about 50 degree of electric energy, and the induction hardening process that the utility model adopts only carries out hot-work for the position to be quenched on the roll, therefore every consumes only 2 degree of electric energy, energy-conservation 96%, in the situation of mass production, the energy consumption of saving is huge, and the economic benefit of creation is considerable; Simultaneously, the induction hardened device of Cr12MoV roll of the present utility model has been started the beginning for the roll induction quenching in the footpath of pony roll from now on, has filled up the international and domestic blank in Cr12MoV induction quenching field.

Description of drawings

Fig. 1 is shown as the structural representation of the induction quenching processing unit (plant) of the utility model Cr12MoV roll.

The element numbers explanation

The induction quenching processing unit (plant) of 1 Cr12MoV roll

10 boards

Top on 11

12 times top

13 heating inductors

14 cooling bubblers

15 orienting sleeves

2 Cr12MoV rolls

Embodiment

See also Fig. 1, be shown as the structural representation of the induction quenching processing unit (plant) of the utility model Cr12MoV roll.As shown in the figure, the induction quenching processing unit (plant) 1 of Cr12MoV roll of the present utility model, comprise board 10, be located at upper on the board, lower top 11,12, from axial direction due clamping position Cr12MoV roll 2, heating inductor 13 and cooling bubbler 14, be sheathed on described Cr12MoV roll 2, be used at the position to be quenched of Cr12MoV roll 2 mobile, respectively by using 13 pairs of Cr12MoV roll positions to be quenched of heating inductor to heat by preset temp, spraying the allotment hardening liquid with cooling bubbler 14 simultaneously comes position described to be quenched cooling, process by laser heating quench method continuously, in addition, described heating inductor translational speed on position described to be quenched is 400mm/min.

In the present embodiment, also be provided with on the described board drive described on, the drive unit (not shown) of lower top rotation, so that on described, lower top 11, but 12 clamping Cr12MoV roll 2 and transverse rotations, thereby realize the purpose of spin hardening, simultaneously, described heating inductor 13 and cooling bubbler 14 are circular, be sheathed on be clamped in described on, lower top 11, Cr12MoV roll 2 between 12, and all can on board 10, vertically slide up and down, the implementation of sliding such as common ball slip etc., only slide continuous quenching at the position to be quenched on Cr12MoV roll 2 while can control thus described heating inductor 13.

The orienting sleeve 15 that the induction quenching processing unit (plant) 1 of Cr12MoV roll of the present utility model is included is sheathed on Cr12MoV roll 2, plays very important positioning action.In the present embodiment, because described Cr12MoV roll 2 rotates centered by axially when quenching, the trace skew can be arranged inevitably in a lateral direction, and the induction quenching processing unit (plant) 1 of Cr12MoV roll of the present utility model makes Cr12MoV roll 2 be positioned to add the thermal center (-tre) by increasing described orienting sleeve 15, reach best quenching effect, avoid reducing the roller quenching quality because of skew.

The utility model provides a kind of induction quenching processing unit (plant) of Cr12MoV roll in the application of reality, adopt following methods: step 1, the heating inductor that will be connected with first heating power supply described roll treat move with pre-set velocity on the induction quenching position, and by described heating inductor to described roll treat that it is 1000 ℃ ~ 1050 ℃ that the induction quenching position is heated to temperature range, use simultaneously the allotment hardening liquid of cooling temperature in 15 ℃ ~ 35 ℃ scopes to quench.Preferably, the frequency of stating heating power supply that present embodiment is selected is 20KHz, and power is 200KW, and stable heating is provided.Through test, in quenching process, described Heating temperature is elected 1030 ℃ as, or described cooling temperature when electing 25 ℃ as the heating quenching effect better.What need special instruction is, method of the present utility model is not to use simple water as refrigerant, be 10% ~ 12% AQ251 quenchant and the allotment hardening liquid that adopts is water concentration, hardening liquid cooling performance through this proportioning of repetition test is best, be highly advantageous to quick cooling in the quenching process, quenching effect is outstanding.And described heating inductor slides take pre-set velocity as 400mm/min on position described to be quenched in the present embodiment, progressively finishes the quenching work of each several part on the quenching position.

In the present embodiment, step 1 comprises that also the initial quenching position of heating inductor on the Cr12MoV roll stops 2s, be conducive to like this guarantee the penetration of hardness of part, simultaneously, Cr12MoV roll part rotary heating in the quenching process of step 1, rotating speed is 30r/min, has guaranteed the homogeneity of the axial hardened layer of part.

In the present embodiment, the size of Cr12MoV roll is at Φ 16X930mm, and rule of thumb the power density values of high frequency and ultrasonic frequency power supply heating is 0.6～2.0kw/cm ²Even cooperate described laser heating quench method to use heating and cooling continuously to carry out.

Step 2 pair described roll carries out the alignment operation, and its distortion inaccuracy is controlled in the 0.5mm.In the present embodiment, detect by alignment, the Cr12MoV roll that is conducive to finish in quenching is chosen salable product, and described distortion inaccuracy is two different girth errors that detect the position of described roll.

Step 3: it is to carry out tempering in 100 ± 5 ℃ the tempering stove that described roll is delivered to tempering temperature.In the present embodiment, choose the Cr12MoV roll of temperature to not detecting by alignment in 100 ± 5 ℃ of scopes, through test, tempering temperature is conducive to produce the product of qualified hardness in this scope.

Step 4: the metallographic structure at position is finished in the quenching of adopting metallographic method to detect described roll, and metallographic structure is reached the roll of 3.5 grades of martensitic stuctures requirements as standardized component.In the present embodiment, martensite (martensite) is a kind of organization name of ferrous material.Martensite (M) is the oversaturated sosoloid that carbon is dissolved in α-Fe, is the metastable phase that austenite is transformed into by diffusionless transformation.Its specific volume is greater than tissues such as austenite, perlite, and this is to produce quenching stress, causes the major cause of strain cracking.Martensite is found in steel (middle, high-carbon) at first: steel is heated to certain temperature (formation austenite) by rapidly cooling (quenching), a kind of quenching structure that can make steel hardening, enhancing that obtains.In the present embodiment, when metallographic structure that the position is finished in the quenching that detects the Cr12MoV roll reach in 3 ~ 7 grades of the martensites more than 3.5 grades the time meet the qualified requirement of product.

Induction quenching processing unit (plant) by Cr12MoV roll of the present utility model, can make roller surface hardness reach 62-63HRC, effective case depth 2.8mm, not only hardness and hardened layer meet the Cr12MoV roll of lattice, if adopt every of traditional integral quenching to need to consume about 50 degree of electric energy, and this practical new technology requirement, and the distortion of this working roll also successfully is controlled in the 0.5mm of requirement.Simultaneously, the induction hardening process that formalism of the same race adopts only carries out hot-work for the position to be quenched on the roll, and therefore every consumes only 2 degree of electric energy, and is energy-conservation 96%, and in the situation of mass production, the energy consumption of saving is huge, and the economic benefit of creation is considerable; Simultaneously, the induction hardened device of Cr12MoV roll of the present utility model, start the beginning for the roll induction quenching in the footpath of pony roll from now on, filled up the induction quenching processing unit (plant) of the international and domestic Cr12MoV roll blank of the present utility model in Cr12MoV induction quenching field.

Claims

1. the induction quenching processing unit (plant) of a Cr12MoV roll is characterized in that, described induction quenching processing unit (plant) comprises at least:

Board;

Upper and lower top, be arranged on the described board, axially the clamping position roll;

Heating inductor and cooling bubbler, be arranged on the described board, and be sheathed on described roll, can move up and down at the induction quenching position for the treatment of of described roll, come to adopt the laser heating quench method to process to the described induction quenching position for the treatment of by preset temperature value heating, injection allotment hardening liquid respectively; And

Orienting sleeve is sheathed on described roll, can in the horizontal described roll be positioned the thermal center (-tre) that adds of described heating inductor, and described heating inductor is carried out vertical guiding in the process that moves up and down.

2. the induction quenching processing unit (plant) of Cr12MoV roll according to claim 1 is characterized in that, described heating inductor translational speed on position described to be quenched is 400mm/min.

3. the induction quenching processing unit (plant) of Cr12MoV roll according to claim 1 is characterized in that, also is provided with the drive unit that drives described upper and lower top rotation on the described board.

4. the induction quenching processing unit (plant) of Cr12MoV roll according to claim 1 is characterized in that, described heating inductor and cooling bubbler are circular, is sheathed on to be clamped on the described upper and lower Cr12MoV roll between top.