CN103409705B - Surface and central property differentiated plate and manufacturing method and device thereof - Google Patents
Surface and central property differentiated plate and manufacturing method and device thereof Download PDFInfo
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- CN103409705B CN103409705B CN201310366317.2A CN201310366317A CN103409705B CN 103409705 B CN103409705 B CN 103409705B CN 201310366317 A CN201310366317 A CN 201310366317A CN 103409705 B CN103409705 B CN 103409705B
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Abstract
The invention relates to a surface and central property differentiated plate and a manufacturing method and device thereof. The single surface or double surfaces of the surface and central property differentiated plate is or are provided with a hardening layer or hardening layers; the tissues of the hardening layer are martensite or martensite and bainite; the tissues of a core part are pearlite or pearlite and ferrite. The manufacturing method comprises the following steps: (1) placing a steel plate to be treated below an induction coil or between two induction coils, and electrifying the induction coils to heat the surface layer of the steel plate by using an induction magnetic field generated by the induction coils; and (2) carrying out rapid cooling on the surface of the steel plate by using cooling water. The manufacturing device comprises a conveying roller, an induction coil device, interval adjusting devices and a transformer, wherein the interval adjusting devices are fixed on two sides of the induction coil device, and the induction coil device and the transformer are fixed together and are connected through a water inlet pipe of the coil. The surface and central property differentiated plate manufactured by using the manufacturing method and device has the characteristics of high surface strength and hardness and good central plasticity and tenacity and is simple and convenient in production method and low in comprehensive cost.
Description
Technical field
The invention belongs to field of material technology, particularly a kind of surface and center performance differentiation sheet material and preparation method thereof and device.
Background technology
Have a lot of working condition requirement surface of steel plate to have high rigidity and high-wearing feature in production practice, and heart portion have high tenacity and good plasticity, as wear-resisting steel plate etc.Wear-resisting steel plate only has one side withstand shocks and wear and tear under some operating mode, and another side is fixed on the component of engineering machinery, the various conveyer trough liner plates, hopper interior lining panel, baffle plate etc. of such as metallurgical machinery and mining machinery; One side performance differentiation slab reveals higher cost performance at these operating mode lower bodies; Under other operating modes, wear-resisting steel plate is two-sided all to withstand shocks and weares and teares, and this requires that steel plate is two-sided and all has higher hardness and wear resistance.
Wearing and tearing are one of principal modes of wear-resisting steel plate inefficacy, and wear-resisting steel plate may wear to a certain degree to be and scraps under normal circumstances, and therefore unnecessary on wear-resisting steel plate thickness direction is wearing layer entirely; And the production technique of existing wear-resisting steel plate is rolling complete after, send into homogeneous heating in the long roller hearth type heating furnace of tens of rice again, and then the big yield rapid quenching that to carry out with full-scale through hardening be target, this explained hereafter wear-resisting steel plate efficiency is low, energy consumption is high, and is difficult to be shaped after quenching.
Summary of the invention
For the problems referred to above that existing wear-resisting steel plate exists technically, the invention provides a kind of surface and center performance differentiation sheet material and preparation method thereof and device, adopt ruhmkorff coil heating steel sheet, the instantaneous quenching of one side or two-sided instantaneous quenching are carried out to sheet material, obtain the sheet material of single or double poor performance alienation, make sheet material top layer have high rigidity and high-wearing feature, and heart portion have high tenacity and good plasticity.
The composition of surface of the present invention and center performance differentiation sheet material is C 0.16 ~ 0.65%, Si 0.20 ~ 0.50%, Mn 0.60 ~ 1.70%, Cr 0 ~ 1.10%, Ni 0 ~ 0.19%, Cu 0 ~ 0.030%, P≤0.035%, S≤0.035% by weight percentage, and surplus is Fe; Surface has quench-hardened case with the single or double of center performance differentiation sheet material; Quench-hardened case be organized as martensite, or be martensite and bainite; Heart portion is organized as perlite, or is perlite and ferrite.
In above-mentioned surface and center performance differentiation sheet material, surface is 20 ~ 80mm with the thickness of center performance differentiation sheet material, and the thickness of individual layer quench-hardened case is 2 ~ 10mm; The thickness of individual layer quench-hardened case is 1/15 ~ 1/3 of sheet metal thickness.
The surface hardness of above-mentioned surface and center performance differentiation sheet material is 360 ~ 700HV, and the hardness in heart portion is 140 ~ 265HV.
Surface of the present invention and center performance differentiation preparation of plates method are carried out according to the following steps:
1, be placed in by the steel plate of mentioned component below ruhmkorff coil or between two ruhmkorff coils, to ruhmkorff coil indirect current, the inducedmagnetic field produced by ruhmkorff coil is heated steel plate, makes surface of steel plate be warming up to 900 ~ 1100 DEG C with the speed of 20 ~ 60 DEG C/s;
2, with water coolant, surface of steel plate is cooled, make surface of steel plate be cooled to less than 200 DEG C with the speed of 20 ~ 80 DEG C/s, obtain surface and center performance differentiation sheet material.
3, after above-mentioned surface and center performance differentiation sheet material are made, 150 ~ 170 DEG C of tempering 1 ~ 3 hour, or tempering is not carried out.
In aforesaid method, when preparing one side and there is surface and the center performance differentiation sheet material of quench-hardened case, by the unilateral heating of ruhmkorff coil to steel plate; When prepare two-sided there is surface and the center performance differentiation sheet material of quench-hardened case time, heated by the two sides of ruhmkorff coil to steel plate simultaneously.
Distance in aforesaid method between ruhmkorff coil and steel plate is 3 ~ 5mm.
The frequency of alternating-current applied ruhmkorff coil in aforesaid method is 3000 ~ 10000Hz.
The device that enforcement aforesaid method of the present invention adopts is divided into single-side induction system and two-sided induction system; Single-side induction system comprises induction heating power, transfer roller, upper ruhmkorff coil device, spacing adjusting device and the first transformer, the both sides of upper ruhmkorff coil device are fixed with spacing adjusting device, upper ruhmkorff coil device is fixed together by two pipe connectings and the first transformer, and the below of upper ruhmkorff coil device is provided with transfer roller; Two-sided induction system comprises two induction heating powers, transfer roller, upper ruhmkorff coil device, lower ruhmkorff coil device, spacing adjusting device, the first transformer and the second transformer, upper and lower ruhmkorff coil device is symmetrical arranged, upper and lower ruhmkorff coil device both sides are equipped with spacing adjusting device, upper ruhmkorff coil device is fixed together by two pipe connectings and the first transformer, lower ruhmkorff coil device is fixed together by two pipe connectings and the second transformer, and lower ruhmkorff coil device both sides are provided with transfer roller.
In said apparatus, each pipe connecting is communicated with water tank, and two pipe connectings on upper ruhmkorff coil device are communicated with upper ruhmkorff coil device inside, and two pipe connectings on lower ruhmkorff coil device are communicated with lower ruhmkorff coil device inside.
In said apparatus, upper ruhmkorff coil device is connected with the two poles of the earth of the first transformer by two pipe connectings on upper ruhmkorff coil device, and lower ruhmkorff coil device is connected with the two poles of the earth of the second transformer by two pipe connectings on lower ruhmkorff coil device.
Above-mentioned spacing adjusting device is primarily of retaining plate, two rolling wheel support, wheel shaft, adjustment bolt, roller and adjustment spring compositions, roller is between two rolling wheel supports, two rolling wheel supports are provided with position adjustments groove separately, two rolling wheel supports also adjust bolt each via screw thread be connected with one, and the wheel shaft of roller is through two position adjustments grooves and adjust bolt and two and adjust spring with two and be connected; In single-side induction system, the top of wheel shaft is connected with two bottoms adjusting bolt, the bottom of wheel shaft is connected with two tops adjusting spring, the bottom of two adjustment springs is connected with the bottom of position adjustments groove, and wheel shaft is vertical with adjustment bolt, roller bottom 3 ~ 5mm lower than upper ruhmkorff coil device bottom surface; In two-sided induction system, spacing adjusting device on upper ruhmkorff coil device is identical with the structure of the spacing adjusting device in single-side induction system, spacing adjusting device on lower ruhmkorff coil device is identical with the structure after the spacing adjusting device flip vertical on upper ruhmkorff coil device, and roller top 3 ~ 5mm higher than lower ruhmkorff coil device end face.
In said apparatus, upper ruhmkorff coil device is primarily of ventpipe, first induction tube, second induction tube, siliconized plate magnetizer, two long angle steel and side shield composition, siliconized plate magnetizer is forced together by multiple silicon steel sheet stack and forms, the below of siliconized plate magnetizer is inlaid with first induction tube and the second induction tube, the side of siliconized plate magnetizer is connected with ventpipe, ventpipe, first induction tube, second induction tube is fixedly connected with a side shield respectively with the two ends of siliconized plate magnetizer, two side shields are also fixedly connected with two long angle steel simultaneously, two long angle steel are positioned at the outside of siliconized plate magnetizer and ventpipe, its Center Vent tube, first induction tube and the second induction tube are arranged successively along the vertical direction of the axis of upper ruhmkorff coil device, lower ruhmkorff coil is identical with the structure after upper ruhmkorff coil flip vertical.
In said apparatus, the axis of the ventpipe on upper ruhmkorff coil device, the first induction tube and the second induction tube all with the axis being parallel of upper ruhmkorff coil device; The axis of the ventpipe on lower ruhmkorff coil device, the first induction tube and the second induction tube all with the axis being parallel of lower ruhmkorff coil device.
In said apparatus, the ventpipe of upper and lower ruhmkorff coil device is equipped with inlet mouth and air outlet; Air outlet on upper ruhmkorff coil device is towards the second induction tube direction; Air outlet on lower ruhmkorff coil device is identical with the structure after the air outlet flip vertical on upper ruhmkorff coil device.
In said apparatus, first induction tube of upper ruhmkorff coil device is communicated with two pipe connectings respectively with one end of the second induction tube, the other end of the first induction tube and the second induction tube interconnects, and the second induction tube is provided with water jet, towards the oblique below of above answering coil device; One end of two induction tubes of lower ruhmkorff coil is communicated with two pipe connectings respectively, and the other end of the first induction tube and the second induction tube interconnects, the second induction tube be provided with spout hole, towards lower oblique upper of answering coil device.
In said apparatus, first transformer is arranged on transformer bracket, transformer bracket is primarily of portal frame, supporting plate, pendulum spring and Hanging bolt composition, supporting plate is connected with the first transformer bottom surface, supporting plate is provided with two through holes, each through hole has a Hanging bolt to pass, two Hanging bolts are also through the back timber of portal frame, the upper and lower two ends of each Hanging bolt are connected with flag nut, supporting plate lower surface is connected with two flag nuts of lower end, the lower surface of two flag nuts of upper end is connected with the top of a pendulum spring respectively, the bottom of each pendulum spring is connected with the upper surface of back timber, and each pendulum spring is enclosed within outside a Hanging bolt separately, second transformer set-up mode is identical with the first transformer.
In said apparatus, steel plate selected by the retaining plate in the spacing adjusting device of upper and lower ruhmkorff coil device.
In said apparatus, the first induction tube and second induction tube of upper and lower ruhmkorff coil device select rectangle copper pipe; First induction tube and the second induction tube are as ruhmkorff coil; Second induction tube is as water-jet simultaneously.
In said apparatus, rectangle copper pipe selected by the ventpipe of upper and lower ruhmkorff coil device.
In said apparatus, first, second transformer is connected with induction heating power, and the water entry of first, second transformer is communicated with water tank with backwater channel.
In said apparatus, the air outlet of the ventpipe of upper and lower ruhmkorff coil device is clearance type air outlet or through-hole type air outlet.
In said apparatus, the retaining plate of each spacing adjusting device of upper and lower ruhmkorff coil device is fixed on long angle steel by standing bolt; Be provided with insulating mat between retaining plate and long angle steel, ensure to insulate between distance adjusting means and ruhmkorff coil device.
In said apparatus, together with the ventpipe of upper and lower ruhmkorff coil device, two induction tubes, siliconized plate magnetizer and two long angle steel are welded and fixed with side shield.
In said apparatus, the rolling wheel support of the spacing adjusting device of upper and lower ruhmkorff coil device is weldingly fixed on retaining plate.
In said apparatus, the long angle steel of upper and lower ruhmkorff coil device is provided with multiple bolt hole, when needing the position adjusting spacing adjusting device, is arranged on by retaining plate on different bolts hole, to adapt to the steel plate of different in width.
Employing said apparatus implements surface and center performance differentiation preparation of plates method is: be sent to below upper ruhmkorff coil device or between upper and lower ruhmkorff coil device by transfer roller by steel plate, steel plate successively below ventpipe, the first induction tube and the second induction tube, or successively through two ventpipes, between two the first induction tubes and two the second induction tubes; Carry alternating-current by induction heating power and transformer to two induction tubes of ruhmkorff coil device, two induction tubes produce inducedmagnetic fields and heat steel plate one side surface or both side surface; In the transformer and two induction tubes of ruhmkorff coil device, pass into water coolant, the water coolant in two induction tubes is sprayed onto steel plate one side surface or both side surface by the water jet on the second induction tube, lowers the temperature to surface of steel plate; Air is passed in ventpipe, air enters between ruhmkorff coil device and steel plate from air outlet, and the water coolant being sprayed onto steel plate one side surface or both side surface is blowed to the direction of steel plate movement, make surface and center performance differentiation sheet material that single or double has quench-hardened case; Steel plate carries out temper or does not carry out temper after leaving ruhmkorff coil device.
In aforesaid method, when preparing one side and there is surface and the center performance differentiation sheet material of quench-hardened case, the roller contact of upper surface of steel plate and upper ruhmkorff coil device; When prepare two-sided there is surface and the center performance differentiation sheet material of quench-hardened case time, the upper and lower surface of steel plate respectively with the roller contact of upper and lower ruhmkorff coil device.
In aforesaid method, the translational speed of steel plate is 1 ~ 8mm/s.
Principle of the present invention is: utilize instantaneous induction heating, and this heat-processed only has the temperature on steel plate top layer to raise rapidly, and the temperature rise in heart portion is very little; After steel plate top layer reaches the target temperature of setting, cooling fast implemented by the waterworks that utilizes pressure and flow to control, can obtain top layer and have the poor performance alienation sheet material that higher hardness and wear resistance and heart portion have enough plasticity and toughness.And traditional wear-resisting steel plate is produced and normally steel plate sent into process furnace and be uniformly heated to quenching temperature and then cool, steel plate heat-processed of the present invention can save energy by contrast.The degree of depth of steel plate quench-hardened case is controlled by changing induction heating power frequency, when preparing the darker steel plate of quench-hardened case, turns down the frequency of induction heating power, when needing thinning quench-hardened case, uses higher frequency.Low-temperaturetempering is to eliminate or reducing steel grade internal stress, reduces quenching fragility.
When prepare two-sided there is surface and the center performance differentiation sheet material of quench-hardened case time, adopt both sides while induction heating method can avoid occurring the asymmetric problem of stress; The spacing between ruhmkorff coil device and steel plate is stablized to adopt spacing adjusting device to ensure.When carrying out induction heating, the frequency of the alternating-current that ruhmkorff coil applies is lower, and the quench-hardened case obtained at surface of steel plate is thicker, therefore makes the sheet material of different quench-hardened case thickness by adjusting frequency.
The present invention adopts pendulum spring and Hanging bolt stationary transformer, be in order to balancing transformer, ruhmkorff coil and auxiliary equipment thereof deadweight and adjust its upper-lower position on a large scale.
Surface of the present invention and center performance differentiation sheet material have good over-all properties, and method is easy, is suitable for suitability for industrialized production, and plant running is stablized, and comprehensive cost is low, has a good application prospect.
Accompanying drawing explanation
Fig. 1 is preparation surface in the embodiment of the present invention 1 and the apparatus structure schematic diagram of center performance differentiation sheet material;
Fig. 2 is that figure is cutd open in the A-A face of Fig. 1;
Fig. 3 is upper ruhmkorff coil device and the spacing adjusting device structural representation of Fig. 1;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is that figure is cutd open in the B-B face of Fig. 3;
Fig. 6 is the surface of preparation and the quench-hardened case microtexture electron micrograph of center performance differentiation sheet material in the embodiment of the present invention 1;
Fig. 7 is the surface of preparation and the heart portion microtexture electron micrograph of center performance differentiation sheet material in the embodiment of the present invention 1;
Fig. 8 is that surface and the center performance differentiation sheet material of preparation in the embodiment of the present invention 1 are from the surperficial distance-hardness profile to heart portion of quench-hardened case;
Fig. 9 is the apparatus structure schematic diagram of preparation surface and center performance differentiation sheet material in the embodiment of the present invention 2;
In figure, 1, upper ruhmkorff coil device, 2, pending steel plate, 3, transfer roller, 4, transfer roller support, 5, Hanging bolt, 6, supporting plate, 7, lower flag nut, 8, upper ruhmkorff coil pipe connecting, 9, upper flag nut, 10, pendulum spring, 11, back timber, 12, first transformer, 13, water tank, 14, first induction heating power, 15, second induction heating power, 16, rolling wheel support, 17, adjustment bolt, 18, roller, 19, wheel shaft, 20, retaining plate standing bolt, 21, long angle steel bolt hole, 22, long angle steel, 23, retaining plate, 24, side shield, 25, siliconized plate magnetizer, 26, ventpipe, 27, adjustment spring, 28, inlet mouth, 29, air outlet, 30, first induction tube, 31, second induction tube, 32, water jet, 33, lower ruhmkorff coil device, 34, lower ruhmkorff coil pipe connecting, 35, second transformer, 36, rubber insulation pad.
Embodiment
The material of the roller adopted in the embodiment of the present invention is common iron.
In the embodiment of the present invention, induction heating power is 70 ~ 100kW to power during ruhmkorff coil device applying alternating-current.
In the embodiment of the present invention upper and lower ruhmkorff coil device spacing adjusting device in retaining plate select steel plate.
In the embodiment of the present invention, the first induction tube and second induction tube of upper and lower ruhmkorff coil device select rectangle copper pipe; First induction tube and the second induction tube are as ruhmkorff coil; Second induction tube is as water-jet simultaneously.
In the embodiment of the present invention, the air outlet of the ventpipe of upper and lower ruhmkorff coil device is strip slot formula air outlet, or is multiple through-hole type air outlet be arranged in a row.
Together with in the embodiment of the present invention, the ventpipe of upper and lower ruhmkorff coil device, two induction tubes, siliconized plate magnetizer and two long angle steel are welded and fixed with side shield.
In the embodiment of the present invention, the rolling wheel support of the spacing adjusting device of upper and lower ruhmkorff coil device is weldingly fixed on retaining plate.
In the embodiment of the present invention, the angle of spout hole axis and horizontal plane is 30o ~ 60 o, and spout hole outlet is towards the travel direction of pending steel plate.
In the embodiment of the present invention on upper and lower ruhmkorff coil device, the two ends of the first induction tube are connected with the two poles of the earth of transformer, and the two ends of the second induction tube are connected with the two poles of the earth of transformer; During applying alternating-current, two induction tubes heat pending steel plate.
In the embodiment of the present invention, rolling wheel support selects angle steel to be made.
Embodiment 1
As shown in Figure 1, A-A face cross-section structure as shown in Figure 2 for the apparatus structure of preparation surface and center performance differentiation sheet material; For single-side induction system, comprise the first induction heating power 14, transfer roller 3, upper ruhmkorff coil device 1, spacing adjusting device and the first transformer 12, the both sides of upper ruhmkorff coil device 1 are respectively fixed with 2 spacing adjusting devices, upper ruhmkorff coil device is fixed together by two upper ruhmkorff coil pipe connectings 8 and the first transformer 12, and the below of upper ruhmkorff coil device 1 is provided with transfer roller 3;
Two upper ruhmkorff coil pipe connectings 8 are communicated with water tank 13, and two upper ruhmkorff coil pipe connectings 8 are communicated with upper ruhmkorff coil device 1 inside;
Upper ruhmkorff coil device 1 is connected with the two poles of the earth of the first transformer 12 respectively by two upper ruhmkorff coil pipe connectings 8; First transformer 12 is connected with the first induction heating power 14;
As shown in Figure 3, as shown in Figure 4, B-B cuts open in face figure as shown in Figure 5 to vertical view for upper ruhmkorff coil device and spacing adjusting device structure;
Spacing adjusting device forms primarily of retaining plate 23, two rolling wheel supports 16, wheel shaft 19, adjustment bolt 17, roller 18 and adjustment spring 27, roller 18 is between two rolling wheel supports 16, two rolling wheel supports 16 are provided with position adjustments groove separately, two rolling wheel supports 16 also adjust bolt 17 each via screw thread be connected with one, roller 18 is enclosed within wheel shaft 19, and wheel shaft 19 is through two position adjustments grooves and adjust bolt 17 and two and adjust spring 27 with two and be connected;
Wherein, the top of wheel shaft 19 is connected with two bottoms adjusting bolt 17, the bottom of wheel shaft 19 is connected with two tops adjusting spring 27, the bottom of two adjustment springs 27 is connected with the bottom of position adjustments groove, and wheel shaft 19 is vertical with adjustment bolt 17, roller 18 bottom 4mm lower than upper ruhmkorff coil device 1 bottom surface;
Upper ruhmkorff coil device 1 is primarily of ventpipe 26, first induction tube 30, second induction tube 31, siliconized plate magnetizer 25, two long angle steel 22 and side shield 24 form, siliconized plate magnetizer 25 is forced together by multiple silicon steel sheet stack and forms, the below of siliconized plate magnetizer 25 is inlaid with first induction tube 30 and the second induction tube 31, the side of siliconized plate magnetizer 25 is connected 26 with ventpipe, ventpipe 26, first induction tube 30, second induction tube 31 is fixedly connected with a side shield 24 respectively with the two ends of siliconized plate magnetizer 25, two side shields 24 are also fixedly connected with two long angle steel 22 simultaneously, two long angle steel 22 are positioned at the outside of siliconized plate magnetizer 25 and ventpipe, its Center Vent tube 26, first induction tube 30 and the second induction tube 31 are arranged successively along the vertical direction of the axis of upper ruhmkorff coil device 1,
Ventpipe 26, first induction tube 30 on upper ruhmkorff coil device 1 and the axis of the second induction tube 31 all with the axis being parallel of upper ruhmkorff coil device 1;
The ventpipe 26 of upper ruhmkorff coil device 1 is provided with inlet mouth 28 and air outlet 29; Air outlet 29 on upper ruhmkorff coil device 1 is towards the second induction tube 31 direction;
First induction tube 30 of upper ruhmkorff coil device 1 and one end of the second induction tube 31 respectively ruhmkorff coil pipe connecting 8 upper with two are communicated with, the other end of the first induction tube 30 and the second induction tube 31 interconnects, second induction tube 31 is provided with multiple water jet 32, and each water jet 32 is arranged in a row and is distributed in below the second induction tube 31; Each water jet 32 is towards the oblique below of above answering coil device; The angle of spout hole 32 axis and horizontal plane is 30o, and spout hole outlet is towards the travel direction of pending steel plate;
First transformer 12 is arranged on transformer bracket, transformer bracket is primarily of portal frame, supporting plate 6, pendulum spring 10 and Hanging bolt 5 form, supporting plate 6 is connected with the first transformer 12 bottom surface, supporting plate 6 is provided with two through holes, each through hole has a Hanging bolt 5 to pass, two Hanging bolts 5 are also through the back timber 11 of portal frame, the two ends up and down of each Hanging bolt 5 are connected to flag nut 9 and lower flag nut 7, supporting plate 6 lower surface is connected with two lower flag nuts 7, the lower surface of two upper flag nuts 9 is connected with the top of a pendulum spring 10 respectively, the bottom of each pendulum spring 10 is connected with the upper surface of back timber 11, and each pendulum spring 10 is enclosed within outside a Hanging bolt 5 separately,
The retaining plate 23 of each spacing adjusting device of upper ruhmkorff coil device 1 is fixed on long angle steel by retaining plate standing bolt 20; Be provided with rubber insulation pad 36 between retaining plate 23 and long angle steel 22, ensure to insulate between distance adjusting means and ruhmkorff coil device 1;
The long angle steel 22 of upper ruhmkorff coil device 1 is provided with multiple long angle steel bolt hole 21, when needing the position adjusting spacing adjusting device, is arranged on by retaining plate 23 on different long angle steel bolts hole 21, to adapt to the pending steel plate of different in width;
Adopt said apparatus preparation surface and center performance differentiation sheet material:
The composition of the pending steel plate selected is C 0.39%, Si 0.20%, Mn 0.65%, Cr 0.86%, Cu 0.012%, Ni 0.16%, P 0.019%, S 0.026% by weight percentage, and surplus is Fe;
Be sent to below upper ruhmkorff coil device by pending steel plate by transfer roller, pending steel plate is successively below ventpipe, the first induction tube and the second induction tube; Carry alternating-current by the first induction heating power and transformer to two induction tubes of ruhmkorff coil device, frequency is 3000Hz, and two induction tubes produce inducedmagnetic fields and heat pending steel plate one side surface; Pending surface of steel plate is made to be warming up to 900 DEG C with the speed of 20 ~ 50 DEG C/s;
In the transformer and two induction tubes of ruhmkorff coil device, pass into water coolant by water tank, the water coolant in two induction tubes is sprayed onto pending steel plate by a heated side surface by the water jet on the second induction tube, lowers the temperature to pending surface of steel plate; Pending surface of steel plate is made to be cooled to less than 200 DEG C with the speed of 20 ~ 60 DEG C/s;
In ventpipe, pass into air, air enters between ruhmkorff coil device and pending steel plate from air outlet, and the water coolant being sprayed onto pending surface of steel plate is blowed to the direction of pending steel plate movement; Pending steel plate carries out after leaving ruhmkorff coil device 150 DEG C of tempering 3 hours, makes surface and center performance differentiation sheet material that one side has quench-hardened case;
When carrying out induction heating, the roller contact of pending upper surface of steel plate and upper ruhmkorff coil device; Distance now between ruhmkorff coil device and pending steel plate is 4mm; Wherein the translational speed of pending steel plate is 2mm/s; The output rating of induction heating power is 90W;
The one side of the surface of making and center performance differentiation sheet material has quench-hardened case; Quench-hardened case be organized as martensite; Heart portion is organized as perlite, and as shown in Figure 6, as shown in Figure 7, surface is 60mm with the thickness of center performance differentiation sheet material to heart portion microtexture to quench-hardened case microtexture, and the thickness of individual layer quench-hardened case is 5mm, is 1/12 of sheet metal thickness; Surface hardness is 690HV, and the hardness in heart portion is 260HV, from quench-hardened case surface to the distance-hardness curve in heart portion as shown in Figure 8; Tempering rear surface hardness is 665 HV.
Embodiment 2
The apparatus structure of preparation surface and center performance differentiation sheet material as shown in Figure 9, for two-sided induction system, comprise the first induction heating power 14, second induction heating power 15, transfer roller, upper ruhmkorff coil device 1, lower ruhmkorff coil device 33, spacing adjusting device, first transformer 12 and the second transformer 35, upper ruhmkorff coil device 1 and lower ruhmkorff coil device 33 are that the plane of symmetry is symmetrical arranged with horizontal plane, on, lower ruhmkorff coil device both sides are equipped with spacing adjusting device, upper ruhmkorff coil device 1 is fixed together by two upper ruhmkorff coil pipe connectings 8 and the first transformer 12, lower ruhmkorff coil device 3 is fixed together by two lower ruhmkorff coil pipe connectings 34 and the second transformer 35, lower ruhmkorff coil device 3 both sides are provided with transfer roller, the disposing way of the first transformer horizontally rotates 90o by the first transformer in embodiment 1 and is formed,
Two upper ruhmkorff coil pipe connectings 8 are communicated with water tank 13, and two upper ruhmkorff coil pipe connectings 8 are communicated with upper ruhmkorff coil device 1 inside; Two lower ruhmkorff coil pipe connectings 34 are communicated with water tank 13, and two lower ruhmkorff coil pipe connectings 34 are communicated with lower ruhmkorff coil device 33 inside;
The structure embodiment 1 simultaneously of upper ruhmkorff coil device 1, the structure of lower ruhmkorff coil device 33 is identical with the structure after upper ruhmkorff coil device 1 flip vertical 180o;
Lower ruhmkorff coil device 33 is connected with the two poles of the earth of the second transformer 35 respectively by two lower ruhmkorff coil pipe connectings 34; Second transformer 35 is connected with the second induction heating power 15;
Spacing adjusting device on upper ruhmkorff coil device 1 is with embodiment 1, spacing adjusting device on lower ruhmkorff coil device 33 is identical with the structure after the spacing adjusting device flip vertical 180o on upper ruhmkorff coil device 1, and wherein roller top is than lower ruhmkorff coil device end face height 3mm;
The method to set up of the first transformer is with embodiment 1, and difference is: the first transformer horizontally rotates 90o compared with embodiment 1; Second transformer 35 is arranged on transformer bracket, and set-up mode is with the set-up mode of the first transformer 12;
Adopt said apparatus preparation surface and center performance differentiation sheet material:
The composition of the pending steel plate selected is C 0.46%, Si 0.27%, Mn 0.66%, Cr 0.12%, Cu 0.012%, Ni 0.16%, P 0.022%, S 0.026% by weight percentage, and surplus is Fe;
Pending steel plate is sent between upper and lower ruhmkorff coil device by transfer roller, pending steel plate successively through two ventpipes of each ruhmkorff coil device, between two the first induction tubes and two the second induction tubes; Carry alternating-current by two induction heating powers and two transformers respectively to two induction tubes of each ruhmkorff coil device, frequency is 10000Hz, and each induction tube produces the both side surface of inducedmagnetic field to pending steel plate and heats; Pending steel plate two surfaces are made all to be warming up to 1100 DEG C with the speed of 30 ~ 60 DEG C/s;
In two induction tubes of two transformers and each ruhmkorff coil device, water coolant is passed into by water tank, water coolant in each induction tube is sprayed onto the both side surface of pending steel plate by the water jet on the second induction tube of each ruhmkorff coil device, lowers the temperature to pending surface of steel plate; Pending steel plate both side surface is made all to be cooled to less than 200 DEG C with the speed of 30 ~ 80 DEG C/s;
In each ventpipe, pass into air, air enters between ruhmkorff coil device and pending steel plate from air outlet, and the water coolant being sprayed onto pending steel plate both side surface is blowed to the direction of pending steel plate movement; Pending steel plate carries out after leaving ruhmkorff coil device 150 DEG C of tempering 1 hour, makes two-sided surface and the center performance differentiation sheet material with quench-hardened case;
When carrying out induction heating, on pending steel plate both side surface respectively with the roller contact of upper and lower ruhmkorff coil device; Distance now between ruhmkorff coil device and pending steel plate is 4mm; Wherein the translational speed of pending steel plate is 5mm/s; The output rating of induction heating power is 80kW;
The both side surface of the surface of making and center performance differentiation sheet material has quench-hardened case; Quench-hardened case be organized as martensite; Heart portion is organized as perlite, and surface is 30mm with the thickness of center performance differentiation sheet material, and the thickness of individual layer quench-hardened case is 2mm, is 1/15 of sheet metal thickness; Surface hardness is 640HV, and the hardness in heart portion is 220HV, and tempering rear surface hardness is 620 HV.
Embodiment 3
The apparatus structure of preparation surface and center performance differentiation sheet material is with embodiment 1, and difference is:
Roller bottom 3mm lower than upper ruhmkorff coil device bottom surface;
The angle of spout hole axis and horizontal plane is 45 o;
Adopt said apparatus preparation surface with center performance differentiation sheet material method with embodiment 1, difference is:
(1) composition of the pending steel plate selected is C 0.42%, Si 0.24%, Mn 0.60%, Cr 1.10%, Cu 0.014%, Ni 0.19%, P 0.021%, S 0.022% by weight percentage, and surplus is Fe;
(2) frequency of alternating-current is 3000Hz; The output rating of induction heating power is 80kW;
(3) during induction heating, pending surface of steel plate is warming up to 950 DEG C with the speed of 20 ~ 50 DEG C/s;
(4) during cooling, pending surface of steel plate is cooled to less than 200 DEG C with the speed of 20 ~ 60 DEG C/s;
(5) pending steel plate carries out after leaving ruhmkorff coil device 170 DEG C of tempering 1 hour;
(6) distance between ruhmkorff coil device and pending steel plate is 3mm; During induction heating, the translational speed of pending steel plate is 1mm/s;
Preparation surface and center performance differentiation sheet material quench-hardened case be organized as martensite; Heart portion is organized as perlite, and thickness is 30mm, and the thickness of quench-hardened case is 10mm, is 1/3 of sheet metal thickness; Surface hardness is 700HV, and the hardness in heart portion is 265HV, and tempering rear surface hardness is 680 HV.
Embodiment 4
The apparatus structure of preparation surface and center performance differentiation sheet material is with embodiment 2, and difference is:
The roller bottom 3mm lower than upper ruhmkorff coil device bottom surface of upper ruhmkorff coil device, the roller top of lower ruhmkorff coil device is than lower ruhmkorff coil device end face height 3mm;
The angle of spout hole axis and horizontal plane is 45 o;
Adopt said apparatus preparation surface with center performance differentiation sheet material method with embodiment 2, difference is:
(1) composition of the pending steel plate selected is C 0.65%, Si 0.26%, Mn 1.1%, Cr 0.20%, Cu 0.030%, Ni 0.19%, P 0.021%, S 0.023% by weight percentage, and surplus is Fe;
(2) frequency of alternating-current is 3000Hz; The output rating of induction heating power is 100kW;
(3) during induction heating, pending steel plate both side surface is warming up to 950 DEG C with the speed of 30 ~ 60 DEG C/s;
(4) during cooling, pending steel plate both side surface is cooled to less than 200 DEG C with the speed of 30 ~ 80 DEG C/s;
(5) pending steel plate carries out after leaving ruhmkorff coil device 150 DEG C of tempering 2 hours;
(6) two distances between ruhmkorff coil device and pending steel plate are 3mm; During induction heating, the translational speed of pending steel plate is 4mm/s;
Preparation surface and center performance differentiation sheet material quench-hardened case be organized as martensite; Heart portion is organized as perlite, and thickness is 80mm, and the thickness of individual layer quench-hardened case is 8mm, and 1/10 surface hardness for sheet metal thickness is 695HV, and the hardness in heart portion is 270HV, and tempering rear surface hardness is 670 HV.
Embodiment 5
The apparatus structure of preparation surface and center performance differentiation sheet material is with embodiment 1, and difference is:
Roller bottom 5mm lower than upper ruhmkorff coil device bottom surface;
The angle of spout hole axis and horizontal plane is 60 o;
Adopt said apparatus preparation surface with center performance differentiation sheet material method with embodiment 1, difference is:
(1) composition of the pending steel plate selected is C 0.16%, Si 0.32%, Mn 1.10%, P 0.024%, S 0.021% by weight percentage, and surplus is Fe;
(2) frequency of alternating-current is 10000Hz; Induction heating power output rating is 90kW;
(3) during induction heating, pending surface of steel plate is warming up to 1000 DEG C with the speed of 30 ~ 60 DEG C/s;
(4) during cooling, pending surface of steel plate is cooled to less than 200 DEG C with the speed of 30 ~ 80 DEG C/s;
(5) tempering is not carried out;
(6) distance between ruhmkorff coil device and pending steel plate is 5mm; During induction heating, the translational speed of pending steel plate is 8mm/s;
Preparation surface and center performance differentiation sheet material quench-hardened case be organized as martensite and bainite; Heart portion is organized as perlite and ferrite, and thickness is 30mm, and the thickness of quench-hardened case is 2mm, is 1/15 of sheet metal thickness; Surface hardness is 360HV, and the hardness in heart portion is 140HV.
Embodiment 6
The apparatus structure of preparation surface and center performance differentiation sheet material is with embodiment 2, and difference is:
The roller bottom 5mm lower than upper ruhmkorff coil device bottom surface of upper ruhmkorff coil device, the roller top of lower ruhmkorff coil device is than lower ruhmkorff coil device end face height 5mm;
The angle of spout hole axis and horizontal plane is 60 o;
Adopt said apparatus preparation surface with center performance differentiation sheet material method with embodiment 2, difference is:
(1) composition of the pending steel plate selected is C 0.18%, Si 0.50%, Mn 1.7%, Cr 0.11%, Cu 0.012%, Ni 0.16%, P 0.020%, S 0.026% by weight percentage, and surplus is Fe;
(2) frequency of alternating-current is 4000Hz; The output rating of induction heating power is 70kW;
(3) during induction heating, pending steel plate both side surface is warming up to 1000 DEG C with the speed of 30 ~ 60 DEG C/s;
(4) during cooling, pending steel plate both side surface is cooled to less than 200 DEG C with the speed of 30 ~ 80 DEG C/s;
(5) tempering is not carried out;
(6) two distances between ruhmkorff coil device and pending steel plate are 5mm; During induction heating, the translational speed of pending steel plate is 4mm/s;
Preparation surface and center performance differentiation sheet material quench-hardened case be organized as martensite and bainite; Heart portion is organized as perlite and ferrite, and thickness is 20mm, and the thickness of individual layer quench-hardened case is 4mm, is 1/5 of sheet metal thickness; Surface hardness is 400HV, and the hardness in heart portion is 190HV.
Claims (6)
1. surface and a center performance differentiation preparation of plates method, is characterized in that carrying out according to the following steps:
(1) be placed in by steel plate below ruhmkorff coil or between two ruhmkorff coils, to ruhmkorff coil indirect current, the inducedmagnetic field produced by ruhmkorff coil, to the heating of steel plate top layer, makes surface of steel plate be warming up to 900 ~ 1100 DEG C with the speed of 20 ~ 60 DEG C/s; The composition of described steel plate is by weight percentage containing C 0.16 ~ 0.65%, Si 0.20 ~ 0.50%, Mn 0.60 ~ 1.70%, Cr 0 ~ 1.10%, Ni 0 ~ 0.19%, Cu 0 ~ 0.030%, P≤0.035%, S≤0.035%, and surplus is Fe;
(2) with water coolant, surface of steel plate is cooled, make surface of steel plate be cooled to less than 200 DEG C with the speed of 20 ~ 80 DEG C/s, make surface and center performance differentiation sheet material; Surface has quench-hardened case with the single or double of center performance differentiation sheet material; Quench-hardened case be organized as martensite, or be martensite and bainite; Heart portion is organized as perlite, or is perlite and ferrite.
2. surface according to claim 1 and center performance differentiation preparation of plates method, is characterized in that the distance between described ruhmkorff coil and steel plate is 3 ~ 5mm.
3. implement the claims a device for surface described in 1 and center performance differentiation preparation of plates method, it is characterized in that this device is divided into single-side induction system and two-sided induction system; Single-side induction system comprises induction heating power, transfer roller, upper ruhmkorff coil device, spacing adjusting device and the first transformer, the both sides of upper ruhmkorff coil device are fixed with spacing stabilizing deyice, upper ruhmkorff coil device is fixed together by two pipe connectings and the first transformer, and the below of upper ruhmkorff coil device is provided with transfer roller; Two-sided induction system comprises two induction heating powers, transfer roller, upper ruhmkorff coil device, lower ruhmkorff coil device, spacing adjusting device, the first transformer and the second transformer, upper and lower ruhmkorff coil device is symmetrical arranged, upper and lower ruhmkorff coil device both sides are equipped with spacing adjusting device, upper ruhmkorff coil device is fixed together by two pipe connectings and the first transformer, lower ruhmkorff coil device is fixed together by two pipe connectings and the second transformer, and lower ruhmkorff coil device both sides are provided with transfer roller.
4. a kind of device implementing surface and center performance differentiation preparation of plates method according to claim 3, it is characterized in that described spacing adjusting device is primarily of retaining plate, two rolling wheel support, wheel shaft, adjustment bolt, roller and adjustment spring compositions, roller is between two rolling wheel supports, two rolling wheel supports are provided with position adjustments groove separately, two short rolling wheel supports also adjust bolt each via screw thread be connected with one, and the wheel shaft of roller is through two position adjustments grooves and adjust bolt and two and adjust spring with two and be connected; In single-side induction system, the top of wheel shaft is connected with two bottoms adjusting bolt, the bottom of wheel shaft is connected with two tops adjusting spring, the bottom of two adjustment springs is connected with the bottom of position adjustments groove, and wheel shaft is vertical with adjustment bolt, roller bottom 3 ~ 5mm lower than upper ruhmkorff coil device bottom surface; In two-sided induction system, spacing adjusting device on upper ruhmkorff coil device is identical with the structure of the spacing adjusting device in single-side induction system, spacing adjusting device on lower ruhmkorff coil device is identical with the structure after the spacing adjusting device flip vertical on upper ruhmkorff coil device, and roller top 3 ~ 5mm higher than lower ruhmkorff coil device end face.
5. a kind of device implementing surface and center performance differentiation preparation of plates method according to claim 3, it is characterized in that described upper ruhmkorff coil device is primarily of ventpipe, first induction tube, second induction tube, siliconized plate magnetizer, two long angle steel and side shield composition, siliconized plate magnetizer is forced together by multiple silicon steel sheet stack and forms, the below of siliconized plate magnetizer is inlaid with the first induction tube and the second induction tube, the side of siliconized plate magnetizer is connected with ventpipe, ventpipe, first induction tube, second induction tube is fixedly connected with a side shield respectively with the two ends of siliconized plate magnetizer, two side shields are also fixedly connected with two long angle steel simultaneously, two long angle steel are positioned at the outside of siliconized plate magnetizer and ventpipe, its Center Vent tube, first induction tube and the second induction tube are arranged successively along the vertical direction of the axis of upper ruhmkorff coil device, described lower ruhmkorff coil is identical with the structure after upper ruhmkorff coil flip vertical.
6. a kind of device implementing surface and center performance differentiation preparation of plates method according to claim 3, it is characterized in that the first described transformer is arranged on transformer bracket, transformer bracket is primarily of portal frame, supporting plate, pendulum spring and Hanging bolt composition, supporting plate is connected with the first transformer bottom surface, supporting plate is provided with two through holes, each through hole has a Hanging bolt to pass, two Hanging bolts are also through the back timber of portal frame, the upper and lower two ends of each Hanging bolt are connected with flag nut, supporting plate lower surface is connected with two flag nuts of lower end, the lower surface of two flag nuts of upper end is connected with the top of a pendulum spring respectively, the bottom of each pendulum spring is connected with the upper surface of back timber, and each pendulum spring is enclosed within outside a Hanging bolt separately, the second described transformer set-up mode is identical with the first transformer.
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| CN201310366317.2A CN103409705B (en) | 2013-08-21 | 2013-08-21 | Surface and central property differentiated plate and manufacturing method and device thereof |
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| CN201310366317.2A CN103409705B (en) | 2013-08-21 | 2013-08-21 | Surface and central property differentiated plate and manufacturing method and device thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036043A (en) * | 1988-03-10 | 1989-10-04 | 达纳公司 | The working method of drive shaft and make its alloy |
| CN1623724A (en) * | 2003-12-03 | 2005-06-08 | 大同特殊钢株式会社 | Mechanical structural shaft component and method of manufacturing the same |
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2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036043A (en) * | 1988-03-10 | 1989-10-04 | 达纳公司 | The working method of drive shaft and make its alloy |
| CN1623724A (en) * | 2003-12-03 | 2005-06-08 | 大同特殊钢株式会社 | Mechanical structural shaft component and method of manufacturing the same |
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