CN101691626B - Production method of pre-hardened high-speed steel products and production device thereof - Google Patents

Production method of pre-hardened high-speed steel products and production device thereof Download PDF

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CN101691626B
CN101691626B CN2009100195390A CN200910019539A CN101691626B CN 101691626 B CN101691626 B CN 101691626B CN 2009100195390 A CN2009100195390 A CN 2009100195390A CN 200910019539 A CN200910019539 A CN 200910019539A CN 101691626 B CN101691626 B CN 101691626B
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straightener
tempering
quenching
speed steel
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CN101691626A (en
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姚凤臣
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Yantai Baite Mould Material Co ltd
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Abstract

The invention discloses a production method of pre-hardened high-speed steel products and a production device thereof. The method is characterized by taking high-speed steel wires as raw materials and comprises the following steps: pre-straightening the raw materials, carrying out quench heating on the pre-straightened raw materials, carrying out small deformation on the high-speed steel wires by a wire-drawing die after quenching, quenching, straightening, tempering in a tempering furnace, straightening, tempering, straightening and cooling, and carrying out cutting-to-length on the products formed by traction by a tractor. The invention is characterized by combining quenching, tempering and straightening to carry out continuous production, realizing online production of the pre-hardened high-speed steel wires, ensuring identical product organizations and properties, ensuring reliable and stable quality and producing various steel wires with length being more than 2m and with good straightness.

Description

A kind of production method of high speed steel prehardening materials and production equipment thereof
Technical field
The invention belongs to the working method and the equipment technical field of special steel material, especially relate to a kind of production method of high speed steel prehardening materials and production equipment thereof.
Background technology
The production of high-speed steel pre-hardening material at present is to adopt high speed steel disk circle aligning, cut-out (length is generally 2m), then the aligning vertical bar is cut off according to production requirement, every no longer than 400mm, with the vertical bar that cuts put into the salt bath furnace heating, washboard is rubbed direct join with the hands and is pressed cold quenching.The quenching bundle is bundled, and many then bundles overlay carries out tempering in the basket, because batch is big in tempering stove, each workpiece heat-up time and Heating temperature are inconsistent, thereby make unstable properties, and simultaneously, workpiece exists a lot of waves curved, needs a large amount of artificial alignings.For diameter greater than this method of the workpiece of 4mm still can, diameter rubs at washboard less than the workpiece of 4mm that to have produced a large amount of fried dough twists when straight curved with the hands, lumber recovery reaches 60% at most.
Produce high-speed steel pre-hardening material and generally adopt the heating of ordinary salt liquid furnace, shortcoming is the temperature control difficulty, easily overheated or burning of workpiece, workpiece can not be definitely perpendicular to liquid level during heating, it is curved to cause workpiece to form wave, the straightener that uses generally adopts washboard-type, to the workpiece of diameter,, make the workpiece leveling effect very poor because workpiece is difficult for rolling smaller or equal to 4mm, have because workpiece and washboard band non-vertical form " fried dough twist is bent ", and aligning length limited system, general length is not more than 500mm, and leveling effect is poor more when long more, must cooperate with artificial aligning, form a lot " wave is curved " during artificial the aligning, the tempering stove of use is because batch is big, and furnace atmosphere circulation is inhomogeneous, cause each workpiece tempering degree varies to cause, cause workpiece performance inequality.
Summary of the invention:
The objective of the invention is to improve the deficiency of prior art and provide a kind of quenching, tempering and aligning to combine to carry out continous way production, realized that pre-hard High Speed Steel Wire carries out online production, product tissue is consistent with performance, reliable in quality stable, can produce length reach the above linearity of 2m well, the production method of High Speed Steel Wire pre-hardening material, with quenching, tempering, aligning the combine production line of formation continous way, the device for producing high-speed steel pre-hardening material that the each several part processing condition are identical, workpiece quality is stable that workpiece carries out online production, workpiece.
The object of the present invention is achieved like this, and a kind of production method of high speed steel prehardening materials is characterized in that this method is a raw material with the rapid steel wire rod, adopts the following steps continuous production:
A, adopt straightener, utilize the damping of straightener to roll and apply prestress the raw material pre-straightening;
B, in controlled atmosphere or salt bath furnace or in the induction furnace to the heating of quenching of the raw material after the pre-straightening, Heating temperature is 1120-1260 ℃, travelling speed is 50-2000mm/min;
C, the back of quenching are carried out a small amount of distortion with wortle to High Speed Steel Wire, and deflection is 0-0.1mm, quenches then.With watercooling jacket steel wire is pressed cold minimizing cooling strain, straightener is aligned the steel wire after quenching;
D, in tempering stove, carry out the tempering first time, make residual austenite change martensite into, reduce stress and also make hardness reach 58-62HRC or 62-65HRC or 66-69HRC with 460 ℃ of-660 ℃ of temperature;
E, the distortion that produces during to the steel wire tempering with straightener are aligned, and watercooling jacket is chilled to room temperature with steel wire before carrying out double tempering, and linearity is not more than 0.05mm/100mm;
F, with 460 ℃ of-660 ℃ of temperature steel wire is carried out the tempering second time with tempering stove, the martensite that produces when making tempering for the first time carries out tempering, and it is 58-62HRC or 62-65HRC or 66-69HRC that hardness and tissue reach hardness;
G, the steel wire that goes out tempering stove are aligned with straightener and watercooling jacket and are cooled off, and linearity is not more than 0.05mm/100mm
The product of h, tractor traction moulding carries out fixed ruler cutting.
In order further to realize purpose of the present invention, can be that whole process of production is carried out continuously in sealed environment.
A kind of device for producing high-speed steel pre-hardening material is characterized in that draw drum, first straightener, quenching furnance, quenching press, second straightener, first tempering stove, first cooler, the 3rd straightener, second tempering stove, second cooler and the 4th straightener and traction stapling machine are connected in sequence.
In order further to realize purpose of the present invention, can be that the connecting portion successively of first straightener, quenching furnance, quenching press, second straightener, first tempering stove, first cooler, the 3rd straightener, second tempering stove, second cooler and the 4th straightener and traction stapling machine is connected by seal channel.
Described straightener, second straightener, the 3rd straightener and the 4th straightener all are to be fixed with fixed roll on frame, and the top of fixed roll is provided with action roller, form steel between fixed roll and action roller by the gap, and action roller is rotated by driven by motor.
Described quenching furnance is to be provided with thermal insulation layer between shell and its inner masonry, the bottom of masonry is a transfer roller, and the top of transfer roller is provided with the sealed tube that axially runs through masonry, and the inwall of masonry is provided with heating tube, the top of masonry is provided with thermopair, and thermopair is connected with electrical control cubicles.
Described quenching press is to be provided with wortle before the import of watercooling jacket, the terminal outer oil groove that is provided with of watercooling jacket.
Described first cooler and second cooler all are that sealed tube is with watercooling jacket outward, and the tail end of sealed tube is provided with oil groove outward.
Described traction stapling machine is that frame is provided with dolly and decides plate, dolly decides to be equipped with on the plate the moving plate of movable trolleys, one end of the moving plate of dolly is provided with cutter, the other end is connected with frame by extension spring, the output shaft of magnetic valve is fixedlyed connected with upper guide post, web plate is fixedlyed connected with the magnetic valve housing by joint pin, be fixed with the following guide pillar relative on the web plate with upper guide post, upper guide post and following guide pillar are with spring outward, the bottom of web plate is fixed with pressure strip by holddown spring, is provided with transmitter at the tail end of frame.
Compared with the prior art the present invention has following distinguishing feature and positively effect: production method of the present invention is with quenching, tempering and aligning combine and carry out continous way production, realized that pre-hard High Speed Steel Wire carries out online production, make constant product quality, can produce length and reach the good various steel wires of the above linearity of 2m, the present invention is with the difference of traditional technology maximum: the processing condition of pre-hard each part of vertical bar of producing with the inventive method are all the same, thereby make tissue and stable performance, linearity still is not more than 0.05mm/100mm when length reaches 2 meters simultaneously, there is not wave curved, the user is according to the production requirement blanking of oneself, each length of each specification all must be got the raw materials ready before needn't resembling, and has significantly reduced user's stock.
The present invention adopts draw drum, first straightener, quenching furnance, quenching press, second straightener, first tempering stove, first cooler, the 3rd straightener, second tempering stove, second cooler and the 4th straightener and traction stapling machine are tightly connected successively and form, such first straightener carries out pre-straightening to coiling circle, high-temperature straightening in the quenching furnance is created conditions, alleviate burden stretching in the High Temperature Furnaces Heating Apparatus, the damping of first straightener is rolled the workpiece in the High Temperature Furnaces Heating Apparatus is applied prestress so that make steel wire straight substantially before entering wortle, quenching furnance heats steel wire, the stove medium is a controlled atmosphere, the wortle of quenching press is curved to the wave that steel wire carries out the existence of slight shaping minimizing steel wire, and workpiece cooled off and distortion when reducing work-piece cools, second straightener is aligned the steel wire distortion of back before the tempering of quenching, first tempering stove carries out tempering to steel wire and carries out destressing, reduce remained austenite content stabilizing tissue hardness and reach requirement, first cooler is cooled to tempering next time rapidly to a tempered workpiece and prepares, the distortion that the 3rd straightener produces during to a tempering, align again, second tempering stove makes tempering for the first time carry out tempering by the martensite that residual austenite changes, reduce stress, stabilizing tissue, stable dimensions, second cooler makes for the first time, and the tempered steel wire is chilled to room temperature rapidly, residual austenite is fully changed martensite into, the 4th straightener carries out shaping to the distortion that double tempering produces, the traction stapling machine is in operation steel wire to be in tensile stress state always, the distortion of minimizing in thermal treatment, and the travelling speed of adjustment steel wire, the traction stapling machine is with workpiece motion s, steel wire is followed the tracks of cut-out, and transmitter carries out scale to steel wire; Great advantage of the present invention is with quenching, tempering, and aligning combines and forms the production line of continous way, makes workpiece carry out online production, and the each several part processing condition of workpiece are identical, thereby makes workpiece quality stable.
Product and the Japanese import of adopting the inventive method and device to produce are as follows with material same specification product performance contrasts (Japanese enterprises provides):
1, the thin wire data of detection the inventive method production are as follows:
1. hardness (taking a sample test 3 at random):
NO1:59.6,60.1,59.7HRC mean value 59.8HRC
NO2:60.2,60.6,60.4HRC mean value 60.4HRC
NO3:59.7,59.3,59.7HRC mean value 59.6HRC
2. decarburization: monolateral 0.06mm
3. metallographic: be the even fine and closely woven tempered structure of quenching, particularly find bigger primary carbide, performance should be better.
4. mechanical property:
Make the counter-bending sample and the impact specimen of same size thin wire and Japanese thin wire respectively according to the inventive method, do simultaneous test in Dalian University of Technology Experiments of Machanics chamber, data such as following table:
Figure G2009100195390D00061
From last data as can be seen, two kinds of material properties are suitable.
5. chemical ingredients:
? C Mn P S Si Cr V W Mo
GB 0.8~ 0.9 0.15~ 0.40 ≤ 0.030 ≤ 0.030 0.20~ 0.45 3.8~ 4.40 1.75~ 2.20 5.50~ 6.75 4.50~ 5.50
My corporatization verification certificate 0.85 0.32 0.026 0.005 0.32 4.13 1.82 5.93 4.79
Day is looked forward to laboratory test report 0.84 0.32 0.018 0.009 0.31 4.02 1.91 6.12 5.11
2, produce two parts of silk thread section products with the inventive method, it is as follows that its linearity and uniformity of hardness detect data:
1. D2.5*L100: totally 20: 0.02,0.02,0.02,0.040,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.01,0.01,0.03,0.02,0.01,0.02,0.03,0.02,0.01, unit: mm
2. D2.5*L150 is totally 12: 0.070,0.03,0.02,0.03,0.04,0.03,0.04,0.02,0.04,0.02,0.04,0.070, and the mm of unit
3. linearity allows standard: be not more than 0.05mm during L=100, be not more than 0.075mm during L=150mm.
4. hardness: detect the hardness of surface and heart portion with Hvlkgf, change the hardness of HRC again into:
Surface: 59.3 59.6 59.4HRC
Heart portion: 59.2 59.7 59.5HRC
3, this processes scope: this technology is fit to processing each trade mark, various material rapid steel series wire rod both at home and abroad, and its product length is more than or equal to 500mm, product diameter 0.2mm-20mm.
Description of drawings
Below in conjunction with drawings and Examples the present invention is described in further detail.
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is a kind of structural representation of straightener of the present invention.
Fig. 3 is a kind of structural representation of quenching furnance of the present invention.
Fig. 4 is a kind of structural representation of quenching press of the present invention.
Fig. 5 is a kind of structural representation of cooler of the present invention.
Fig. 6 draws a kind of structural representation of stapling machine for the present invention.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment, a kind of production method of high speed steel prehardening materials, be that production method is a raw material with the rapid steel wire rod, each operation continuous production, uninterruptedly, be to adopt straightener earlier to the raw material pre-straightening, utilize the damping of straightener to roll and apply prestress, in controlled atmosphere or salt bath furnace or in the induction furnace to the heating of quenching of the raw material after the pre-straightening, Heating temperature is 1120-1260 ℃, travelling speed is 50-2000mm/min, with wortle High Speed Steel Wire is carried out a small amount of distortion after quenching, deflection is 0-0.1mm, quench then, steel wire is pressed cold with straightener and water jacket, reduce cooling strain, simultaneously the steel wire after quenching is aligned, in tempering stove, carry out the tempering first time with 460 ℃ of-660 ℃ of temperature, make residual austenite change martensite into, reduce stress and make hardness reach requirement, the distortion that produces during to the steel wire tempering with straightener is aligned, watercooling jacket carries out steel wire to be chilled to room temperature before the double tempering, with 460 ℃ of-660 ℃ of temperature steel wire is carried out the tempering second time with tempering stove, the martensite that produces when making tempering for the first time carries out tempering, and hardness and tissue reach requirement, and the steel wire that goes out tempering stove is aligned with watercooling jacket and straightener and cooled off, the product of tractor traction moulding carries out fixed ruler cutting.
The production equipment of above-mentioned production method of high speed steel prehardening materials, with reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, it is draw drum 1, first straightener 2, quenching furnance 3, quenching press 4, second straightener 5, first tempering stove 6, first cooler 7, the 3rd straightener 8, second tempering stove 9, second cooler 10 and the 4th straightener 11 and traction stapling machine 12 are connected in sequence, connecting portion connects by seal channel successively, first straightener 2, second straightener 5, the 3rd straightener 8 and the 4th straightener 11 all are to be fixed with fixed roll 21 on frame, the top of fixed roll 21 is provided with action roller 22,22 of fixed roll 21 and action rollers form steel by the gap, and action roller 22 is rotated by driven by motor; Quenching furnance 3 is that shell 31 and 32 of its inner masonries are provided with thermal insulation layer 33, the bottom of masonry 32 is a transfer roller 34, the top of transfer roller 34 is provided with the sealed tube 35 that axially runs through masonry 32, the inwall of masonry 32 is provided with heating tube 36, heating tube 36 connects power supply, and the top of masonry 32 is provided with thermopair 37, and thermopair 37 is connected with electrical control cubicles, thermopair 37 passes to electrical control cubicles with temperature signal, and electrical control cubicles heats with power connection according to temperature control heating tube 36 or disconnects and stop to heat; Quenching press 4 is to be provided with wortle 42 before the import of watercooling jacket 41, and the terminal outer of watercooling jacket 41 is provided with oil groove 43, is provided with oil pump in the oil groove 43, by oil pump pump oil; First cooler 7 and second cooler 10 all are that the bottom of sealed tube 71 is arranged in the watercooling jacket 72, and the tail end of sealed tube 71 is provided with oil groove 73 outward; Traction stapling machine 12 is that frame is provided with dolly and decides plate 81, dolly decides to be equipped with on the plate 81 the moving plate 811 of movable trolleys, one end of the moving plate 811 of dolly is provided with cutter 82, the other end is connected with frame by extension spring 812, magnetic valve 83 is fixed on the moving plate 811 of dolly by support, the output shaft of magnetic valve 83 is fixedlyed connected with upper guide post 84, web plate 85 is fixedlyed connected with magnetic valve 83 housings by joint pin, be fixed with the following guide pillar 86 relative on the web plate 85 with upper guide post 84, when the output shaft of magnetic valve 83 stretches out, upper guide post 84 can be oppressed down guide pillar 86 and be moved down, upper guide post 84 and the following guide pillar 86 outer springs 87 that are with, the following of web plate 85 is fixed with pressure strip 89 by holddown spring 88, tail end in frame is provided with transmitter 810, by the position of 82 of transmitter 810 and cutters is set, can realize cutting out the purpose of different lengths steel, transmitter 810 passes to magnetic valve 83 with the signal that detects, magnetic valve 83 output shafts stretch out, upper guide post 84 compresses down guide pillar 86, promoting web plate 85 moves down, compression holddown spring 88, the steel that the moving plate 811 of pressure strip 89 and dolly is clamped therebetween, cutter 82 cuts off steel then, and this has constituted the production equipment of production method of high speed steel prehardening materials of the present invention.

Claims (9)

1. a production method of high speed steel prehardening materials is characterized in that this method is a raw material with the rapid steel wire rod, adopts the following steps continuous production:
A, adopt straightener, utilize the damping of straightener to roll and apply prestress the raw material pre-straightening;
B, in controlled atmosphere or salt bath furnace or in the induction furnace to the heating of quenching of the raw material after the pre-straightening, Heating temperature is 1120-1260 ℃, travelling speed is 50-2000mm/min;
C, the heating back of quenching are carried out constant with wortle to High Speed Steel Wire or distortion in a small amount, and deflection is 0-0.1mm, quenches then, with watercooling jacket steel wire is pressed cold minimizing cooling strain, and straightener is aligned the steel wire after quenching;
D, in tempering stove, carry out the tempering first time, make residual austenite change martensite into, reduce stress and also make hardness reach 58-62HRC or 62-65HRC or 66-69HRC with 460 ℃ of-660 ℃ of temperature;
E, watercooling jacket are cooled to room temperature with steel wire before carrying out the tempering second time, the distortion that produces during to the steel wire tempering with straightener is aligned, and linearity is not more than 0.05mm/100mm;
F, with 460 ℃ of-660 ℃ of temperature steel wire is carried out the tempering second time with tempering stove, the martensite that produces when making tempering for the first time carries out tempering, and hardness reaches 58-62HRC or 62-65HRC or 66-69HRC;
G, the steel wire that goes out tempering stove cool off with watercooling jacket, align linearity with straightener and are not more than 0.05mm/100mm;
The product of h, tractor traction moulding carries out fixed ruler cutting.
2. according to claim 1 production method of high speed steel prehardening materials, it is characterized in that whole process of production carries out continuously in sealed environment.
3. the production equipment of the described production method of high speed steel prehardening materials of claim 1 is characterized in that draw drum (1), first straightener (2), quenching furnance (3), quenching press (4), second straightener (5), first tempering stove (6), first cooler (7), the 3rd straightener (8), second tempering stove (9), second cooler (10) and the 4th straightener (11) and traction stapling machine (12) are connected in sequence.
4. the production equipment of a kind of production method of high speed steel prehardening materials according to claim 3 is characterized in that first straightener (2), quenching furnance (3), quenching press (4), second straightener (5), first tempering stove (6), first cooler (7), the 3rd straightener (8), second tempering stove (9), second cooler (10) and the 4th straightener (11) are connected by seal channel with the connecting portion successively of traction stapling machine (12).
5. the production equipment of a kind of production method of high speed steel prehardening materials according to claim 3, it is characterized in that described first straightener (2), second straightener (5), the 3rd straightener (8) and the 4th straightener (11) all are to be fixed with fixed roll (21) on frame, the top of fixed roll (21) is provided with action roller (22), form steel between fixed roll (21) and action roller (22) by the gap, action roller (22) is rotated by driven by motor.
6. the production equipment of a kind of production method of high speed steel prehardening materials according to claim 3, it is characterized in that described quenching furnance (3) is to be provided with thermal insulation layer (33) between shell (31) and its inner masonry (32), the bottom of masonry (32) is transfer roller (34), the top of transfer roller (34) is provided with the sealed tube (35) that axially runs through masonry (32), the inwall of masonry (32) is provided with heating tube (36), the top of masonry (32) is provided with thermopair (37), and thermopair (37) is connected with electrical control cubicles.
7. the production equipment of a kind of production method of high speed steel prehardening materials according to claim 3 is characterized in that described quenching press (4) is to be provided with wortle (42), the terminal outer oil groove (43) that is provided with of watercooling jacket (41) before the import of watercooling jacket (41).
8. the production equipment of a kind of production method of high speed steel prehardening materials according to claim 3, it is characterized in that described first cooler (7) and second cooler (10) all are that sealed tube (71) is outer and are with watercooling jacket (72), the tail end of sealed tube (71) is provided with oil groove (73) outward.
9. the production equipment of a kind of production method of high speed steel prehardening materials according to claim 3, it is characterized in that described traction stapling machine (12) is that frame is provided with dolly and decides plate (81), dolly decides to be equipped with on the plate (81) the moving plate (811) of movable trolleys, the end that dolly moves plate (811) is provided with cutter (82), the other end is connected with frame by extension spring (812), the output shaft of magnetic valve (83) is fixedlyed connected with upper guide post (84), web plate (85) is fixedlyed connected with magnetic valve (83) housing by joint pin, be fixed with the following guide pillar (86) relative on the web plate (85) with upper guide post (84), the outer spring (87) that is with of upper guide post (84) and following guide pillar (86), the bottom of web plate (85) is fixed with pressure strip (89) by holddown spring (88), is provided with transmitter (810) at the tail end of frame.
CN2009100195390A 2009-09-30 2009-09-30 Production method of pre-hardened high-speed steel products and production device thereof Active CN101691626B (en)

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Address after: Laishan District 264003 of Shandong province Yantai City Shengquan Industrial Park Road No. 28 Yantai Zhen Baxter mold material limited company

Patentee after: Yao Fengchen

Address before: 264003, No. 3, unit 3, building 7, South West Street, Qingquan village, Laishan District, Shandong, Yantai

Patentee before: Yao Fengchen

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Effective date of registration: 20210106

Address after: No.38, Wanda Road, Laishan District, Yantai City, Shandong Province

Patentee after: Yantai Baite Mould Material Co.,Ltd.

Address before: 264003 Yantai Baite Mould Material Co., Ltd., No. 28, Fuda Road, Shengquan Industrial Park, Laishan District, Yantai City, Shandong Province

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Address after: No.38, Wanda Road, Laishan District, Yantai City, Shandong Province

Patentee after: Yantai Baite alloy material manufacturing Co.,Ltd.

Address before: No.38, Wanda Road, Laishan District, Yantai City, Shandong Province

Patentee before: Yantai Baite Mould Material Co.,Ltd.

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Effective date of registration: 20240514

Address after: No.38, Wanda Road, Laishan District, Yantai City, Shandong Province

Patentee after: Yantai Baite Mould Material Co.,Ltd.

Country or region after: China

Address before: No.38, Wanda Road, Laishan District, Yantai City, Shandong Province

Patentee before: Yantai Baite alloy material manufacturing Co.,Ltd.

Country or region before: China

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