CN104252967B - Control method for heat treatment of amorphous alloy three-dimensional wound iron core - Google Patents

Abstract

The invention discloses a control method for heat treatment of an amorphous alloy three-dimensional wound iron core. The control method comprises the following steps of inserting a plurality of thermocouples into intersection points between the centers of the stack thicknesses and the centers of the widths of a plurality of single iron cores in a one-to-one correspondence manner; placing a three-dimensional wound iron core into an annealing furnace and opening all heating devices in all subareas in the annealing furnace for starting heating; in the heating process, monitoring the real-time temperature of one single iron core corresponding to each thermocouple by each thermocouple; when each thermocouple monitors that the real-time temperature of the corresponding single iron core reaches a set value, adjusting the power of the heating device in the subarea closest to the single iron core or closing the heating device in the corresponding subarea and stopping heating; when the thermocouples monitor that the temperatures of all the single iron cores reach the set values, starting timing and heat preservation; after the heat preservation is finished, closing the heating devices in all the subareas in the annealing furnace, and starting cooling until the temperature of each iron core is reduced to room temperature. According to the control method for heat treatment, disclosed by the invention, the uniformity of the amorphous alloy three-dimensional wound iron core can be guaranteed.

Description

A kind of control method of the heat treatment of amorphous alloy stereo roll iron core

Technical field

The present invention relates to a kind of control method of the heat treatment of amorphous alloy stereo roll iron core.

Background technology

Amorphous alloy core magnetic hysteresis and eddy current loss very little, it is left that its iron loss can reduce by 70% than general silicon steel plate core The right side, has substantially low exciting power simultaneously, is that the ideal distribution transformer of current energy-saving effect is unshakable in one's determination, particularly suitable In rural power grids and developing region even load rate lower ground side.

Amorphous alloy strips are also easy to produce stress in fast quenching, punching, coiling process when unshakable in one's determination, in order to obtain good unloaded damage Consumption characteristic, typically will be made annealing treatment under magnetic field condition, and this is the critical process that amorphous alloy core manufactures.Conventional is non- Due to being limited by amorphous alloy strips width, shape of cross section is rectangle to peritectic alloy plane wound core, is wherein Strip width 142mm, 170mm or 213mm and combinations thereof.Because strip width is fixed, and it is same heat spray, therefore Band performance itself is relatively stable, and corresponding annealing process is also easily controlled, and open circuit loss unshakable in one's determination and exciting power can also Obtain preferable performance indications, only the thermocouple 2 of temperature unshakable in one's determination for monitoring need to be inserted in unshakable in one's determination 1 and fold thick and width center position Get final product (see Fig. 1), then after the temperature of thermocouple monitoring reaches setting value, start to be incubated, after the completion of insulation, be cooled to room temperature, Can reach preferable thermal effectiveness.

But amorphous alloy core is in annealing, more sensitive to temperature and time, only in a narrower temperature and In time range, can be only achieved best annealing effect.If annealing temperature is too high, temperature retention time is long, and amorphous alloy core is just Have the trend of crystallization, no longer possess the low advantage of amorphous alloy core open circuit loss；If annealing temperature is too low, temperature retention time is too Short, then amorphous alloy core internal structure relaxation effect is insufficient, equally cannot realize that open circuit loss is low and exciting power.For Cross section is in external semicircular three dimensional wound core, and the amorphous alloy strips width of wound core is also not wait.Generally adopt The strip coil of many level widths that 25～213mm does not wait is around if according to conventional annealing process unshakable in one's determination, will certainly cause narrower band Material is heated excessively, causes penalty, and wider band is then heated insufficient, causes integral core composite behaviour poor, because This needs to develop specific Technology for Heating Processing and carries out stress relieving to amorphous alloy stereo roll iron core.

Content of the invention

The invention aims to overcoming the deficiencies in the prior art, provide at a kind of heat of amorphous alloy stereo roll iron core The control method of reason, it will ensure that the performance uniformity of amorphous alloy stereo roll iron core, improves the product qualified rate of product.

The technical scheme realizing above-mentioned purpose is：A kind of control method of the heat treatment of amorphous alloy stereo roll iron core, institute Stating three dimensional wound core is the rectangle frame being become with Double layer iron yoke piece by core limb about height identical, each three dimensional wound core be by Multiple monomer iron core frames form according to individual nesting, and each monomer iron core frame is to be formed by the amorphous alloy strips winding of equal in width, makes The basic semicircular in shape in cross section of unit core post and unit iron yoke；

The control method of described heat treatment is：Several thermocouples are inserted in unshakable in one's determination the folding of several monomers correspondingly The center point of intersection of thick center and width, then by three dimensional wound core put into annealing furnace and open each subregion in annealing furnace plus Thermal begins to warm up, and in heating process, the corresponding monomer of each thermocouple monitoring real time temperature unshakable in one's determination, when thermocouple prison When measuring corresponding monomer real time temperature unshakable in one's determination and reaching setting value, adjustment is apart from the heating dress of this monomer nearest subregion unshakable in one's determination The watt level put, or close the heater stop heating of this subregion, treat that thermocouple monitoring arrives all of monomer iron core When temperature reaches setting value, start timing insulation, after the completion of insulation, close the heater of each subregion in annealing furnace, start Cooling down, until temperature unshakable in one's determination is down to room temperature.

The control method of the heat treatment of above-mentioned amorphous alloy stereo roll iron core, wherein, described thermocouple at least two, This two thermocouples are to be plugged on the folded thick center unshakable in one's determination by the monomer of the amorphous alloy strips winding of Breadth Maximum and width Center point of intersection and the center by the monomer of the amorphous alloy strips winding of secondary narrow width folded thick center unshakable in one's determination and width Point of intersection.

The control method of the heat treatment of above-mentioned amorphous alloy stereo roll iron core, wherein, setting temperature in described annealing furnace To spend for 300～400 DEG C, the setting value of described monomer temperature unshakable in one's determination is 290～390 DEG C, described temperature retention time is 20～ 240min.

The technical scheme of the control method of the heat treatment of the amorphous alloy stereo roll iron core of the present invention, different wide at several The center point of intersection of the degree folded thick center unshakable in one's determination with folded thick monomer and width is planted a thermocouple respectively, by each heat The real time temperature of the corresponding monomer iron core of galvanic couple monitoring, the power to adjust the heater of each subregion annealing furnace Nei is big Little, close heat being obtained with the monomer iron core guaranteeing different bandwidth and folded thickness, thus improving performance and the yield rate of product, increasing Plus economic benefit.

Brief description

Fig. 1 is the placement location schematic diagram using thermocouple during existing amorphous alloy plane rewinding material heat treatment；

Fig. 2 is the placement position of thermocouple during the control method of the heat treatment of the amorphous alloy stereo roll iron core using the present invention Put schematic diagram.

Specific embodiment

In order to be able to preferably understand to technical scheme, below by specifically embodiment and combine accompanying drawing It is described in detail：

Amorphous alloy stereo roll iron core involved by the control method of the heat treatment of the present invention be by height identical about The rectangle frame that core limb becomes with Double layer iron yoke piece, each three dimensional wound core is to be formed according to individual nesting by multiple monomer iron core frames, often Individual monomer iron core frame is to be formed by the amorphous alloy strips winding of equal in width, makes the cross section base of unit core post and unit iron yoke This semicircular in shape.

The control method of the heat treatment of the amorphous alloy stereo roll iron core of the present invention is：Several thermocouples are corresponded Be inserted in the center point of intersection at several monomers folded thick center unshakable in one's determination and width, then three dimensional wound core is put into annealing furnace simultaneously The heater opening each subregion in annealing furnace begins to warm up, and makes the design temperature in annealing furnace reach 300～400 DEG C, In heating process, the corresponding monomer of each thermocouple monitoring real time temperature unshakable in one's determination, when thermocouple monitoring is to corresponding monomer ferrum When the real time temperature of the heart reaches 290～390 DEG C of setting, the work(of the heater apart from this monomer nearest subregion unshakable in one's determination for the adjustment Rate size, or close the heater stop heating of this subregion, treat that thermocouple monitoring reaches to all of monomer temperature unshakable in one's determination During to setting value, start timing insulation, temperature retention time is 20～240min, after the completion of insulation, close each subregion in annealing furnace Heater, start cooling down, until temperature unshakable in one's determination is down to room temperature.

In one embodiment (see Fig. 2), by 200kVA iron core as a example, this iron core 1 be by 5 monomer iron cores 11～15 according to Individual nesting forms, and this 5 monomer iron cores 11～15 are respectively by the amorphous alloy strips coiling correspondingly of 5 kinds of rank width , using two thermocouples, this two thermocouples are individually positioned in the monomer ferrum of the amorphous alloy strips winding of Breadth Maximum The monomer of the amorphous alloy strips winding with the center point of intersection of width with by secondary narrow width for the folded thick center of the heart 11 (the 1st grade) The folded thick center of 14 (the 4th grades) unshakable in one's determination and the center point of intersection (see Fig. 2) of width, by two thermocouples 21,24 monitoring Real time temperature suitably to adjust annealing furnace each partition heating watt level it might even be possible to close area heating installation, to guarantee not Obtain close heat, and then the optimum efficiency of the overall three dimensional wound core heat treatment of guarantee with bandwidth and accordingly folded thick band, Obtain excellent open circuit loss and exciting power index.

The control method of the heat treatment of the amorphous alloy stereo roll iron core of the present invention, the concrete placement location of thermocouple is root Make corresponding adjustment according to amount of capacity unshakable in one's determination, bandwidth layout, bandwidth series, folded thickness at different levels etc..

Those of ordinary skill in the art it should be appreciated that above embodiment be intended merely to illustrate the present invention, And be not used as limitation of the invention, the change as long as in the spirit of the present invention, to embodiment described above Change, modification all will fall in the range of claims of the present invention.

Claims (3)

1. a kind of control method of the heat treatment of amorphous alloy stereo roll iron core, described three dimensional wound core is left by height identical The rectangle frame that right core limb becomes with Double layer iron yoke piece, each three dimensional wound core is to be formed according to individual nesting by multiple monomer iron core frames, Each monomer iron core frame is to be formed by the amorphous alloy strips winding of equal in width, makes left and right core limb and the cross section of upper and lower iron yoke Basic semicircular in shape；It is characterized in that,

The control method of described heat treatment is：Several thermocouples are inserted in correspondingly the folded thickness of several monomer iron core frames Center and width center point of intersection, then three dimensional wound core is put into annealing furnace and opens the heating of each subregion in annealing furnace Device begins to warm up, and in heating process, the real time temperature of each thermocouple monitoring corresponding monomer iron core frame, when thermocouple prison When measuring the real time temperature of corresponding monomer iron core frame and reaching setting value, adjustment apart from the nearest subregion of this monomer iron core frame plus The watt level of thermal, or close the heater stop heating of this subregion, treat that thermocouple monitoring arrives all of monomer ferrum When the temperature of heart frame reaches setting value, start timing insulation, after the completion of insulation, close the heating dress of each subregion in annealing furnace Put, start cooling down, until temperature unshakable in one's determination is down to room temperature.

2. the control method of the heat treatment of amorphous alloy stereo roll iron core according to claim 1 is it is characterised in that described Thermocouple at least two, this two thermocouples are to be plugged on by the monomer iron core frame of the amorphous alloy strips winding of Breadth Maximum The center point of intersection of folded thick center and width and by secondary narrow width amorphous alloy strips winding monomer iron core frame folded Thick center and the center point of intersection of width.

3. the control method of the heat treatment of amorphous alloy stereo roll iron core according to claim 1 is it is characterised in that described Design temperature in annealing furnace is 300～400 DEG C, and the setting value of the temperature of described monomer iron core frame is 290～390 DEG C, described Temperature retention time is 20～240min.