CN101012491A - Method for preventing end-face spray quenching cracking of quenching piece by changing spray angle - Google Patents
Method for preventing end-face spray quenching cracking of quenching piece by changing spray angle Download PDFInfo
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- CN101012491A CN101012491A CN 200710037031 CN200710037031A CN101012491A CN 101012491 A CN101012491 A CN 101012491A CN 200710037031 CN200710037031 CN 200710037031 CN 200710037031 A CN200710037031 A CN 200710037031A CN 101012491 A CN101012491 A CN 101012491A
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Abstract
The invention discloses an end-face spray quenching crack-preventing method of quenching piece through changing spraying angle in the heat disposal domain of metal material, which is characterized by the following: placing quenching piece in the quenching equipment with pipe; making quenching piece with lateral and end faces; setting lateral face as rapid freezing face only; paralleling lateral face and pipe; setting the end face of quenching piece perpendicular to pipe; flowing quenching dielectric through pipe; displaying angle a (0-90 deg) for pipe and lateral face of quenching piece; fitting for cooling lateral face of quenching piece; avoiding crack effectively.
Description
Technical field
What the present invention relates to is the method in a kind of metallic substance heat treatment technics field, particularly a kind of spray angle prevent to quench end face spray quenching rimose method of part that changes.
Background technology
Quenching is meant steel part is heated to A
C3Or A
C1The above a certain temperature of point keeps certain hour, obtains the thermal treatment process of intended tissue then with suitable speed cooling.The quenching part is because size is big and quenching part thermal capacitance is big, make it when carrying out quench cooled, enough big speed of cooling must be arranged, cause in the process of cooling surface and heart portion to produce the very big temperature difference and the asynchronism of structural transformation, make the quenching part produce very big internal stress, rimose is dangerous to be increased thereby produce.For the microstructure and property that obtains to expect cracking occurs with preventing in process of cooling, many cooling apparatuss and processing method are used.Comprising the gap process for cooling that adopts shrend-oil cooling and the gap process for cooling of shrend-air cooling.The gap type of cooling of shrend-oil cooling makes full use of water has stronger cooling power and oil that the characteristic of demulcent cooling power is arranged at cold zone in the high-temperature zone, but this type of cooling can only be applied to the smaller parts of carbon steel and steel alloy manufacturing, and oil also pollutes the environment.The cooling of the gap of shrend-air cooling, its speed of cooling can be between water-cooled and air coolings, can be by regulating water-cooled and air cooling time controlled chilling speed.The difficulty of this method is the control of the switching time of water-cooled and air cooling.
Find through literature search prior art, Chinese patent application number: 02136831.7, name is called: large alloy steel member water quenching layer built self-tempering process, this patent disclosure a kind of large alloy steel member water quenching layer built self-tempering process, technology is as follows: the quenching part is soaked to quench or spray water in water be cooled to the surface and reach below the Ms point; The quenching part left the water in air stop in short-term; Again immerse in the water and to continue cooling, when taking care portion's temperature and also being chilled near the Ms, the quenching part is left the water once more, in air, stop in short-term after the water outlet.But under the hydrojet refrigerative situation of routine, end face and side are sprayed, end face dispels the heat simultaneously because of both direction, speed of cooling is relatively large, will strengthen at end face and edges and corners generation rimose tendency thereof, and particularly two of forging end faces are by under the situation of sawing.Also find in the retrieval, Chinese patent application number: CN87101239.1, name is called: the complex-shaped part of large section ratio prevents the coating material of hardening crack, this patent disclosure the complex-shaped part of large section ratio prevent the coating material of hardening crack, it is mixed this coating material by certainweight ratio fireclay, particle sand and water glass and forms, and also can adopt fireclay, quartz sand and water mixing material to the part of non-liquid heating quenching.But, the coating material that prevents hardening crack of the employing of this invention is disposable coating material, can't use for large-sized quenching part, reason is that the face area of large size quenching part is bigger, the material that applies peels off in long heat-processed and in the transfer process of quenching part easily, especially at the position, corner, therefore in actual production, use to be restricted.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of spray angle prevent to quench end face spray quenching rimose method of part that changes is proposed, make it by changing spray angle, reduce the speed of cooling of quenching part end face in the spray quenching process, avoid the rimose purpose thereby reach, and solved the deficiency in the background technology.
The present invention is achieved by the following technical solutions, and the present invention is placed on the quenching part among the quenching apparatus that is furnished with water pipe, and the quenching part is made up of side and end face, and the side is for needing quick refrigerative face, and end face is not for needing quick refrigerative face.The side of quenching part is parallel with water pipe, and the end face of quenching part is vertical with water pipe.The quenchant water pipe of flowing through, by and the water pipe jet pipe that is a angle (a is between 0 °～90 °) spray to the side of quenching part, the side of quenching part is well cooled off.Because the end face of quenching part is vertical with water pipe, the quenchant of jet pipe ejection and the end face of quenching part are 90 °-a angle, the quenchant of jet pipe ejection just fails directly to be sprayed onto the end face of quenching part like this, and the result is that the speed of cooling of end face of quenching part is lower, has avoided the rimose generation.
Among the present invention, water pipe is installed in quench zone two, three or four sides, promptly corresponding with the side that needs refrigerative quenching part, jet pipe is installed in the direction towards the zone of quenching on the water pipe, jet pipe and water pipe are that symmetric line and water pipe are a angle respectively with medullary ray A-A, angle a is between 0 °～90 °, and the medium of jet pipe ejection and the end face of quenching part are 90 °-a angle, makes the medium of ejection can not directly be sprayed onto the end face of quenching part.Be installed in the jet pipe of middle portion (medullary ray A-A is the near zone of symmetric line) of water pipe and water pipe with medullary ray A-A be symmetric line and with a angle≤90 of water pipe °, be installed in the jet pipe of rest part of water pipe and a angle that water pipe with medullary ray A-A is symmetric line and water pipe between greater than 0 ° and less than 90 ° between.
The quenching part be placed on the quenching apparatus that is furnished with water pipe among, the side of quenching part is parallel with water pipe, the end face of quenching part is vertical with water pipe.
The shape of the quenching part that the present invention is suitable for can be square, cylindrical or other obform body, and the end face of quenching part can be that the plane also can be curved surface or shaped face.
The present invention adopts hydrojet or hydrojet and immersion liquid combination or hydrojet and air cooling combination or multiple modes such as hydrojet, immersion liquid and air cooling combination to quench.The medium that adopts can be water or water-soluble quenching medium.
The present invention has substantive distinguishing features and marked improvement, the present invention has following characteristics and effect: 1) by changing the hydrojet angle end face of quenching part is not directly cooled off by the medium that jet pipe sprays, slowed down the cooling intensity of the end face of quenching part, made it be unlikely to ftracture.The end face that has solved the quenching part quenches under the situation of unprotect measure and the problem of crackle may occur.2) after employing method of the present invention is quenched,, but still be higher than the centre hardness of quenching part, can not produce adverse influence quality product though the hardness of the end face of quenching part is lower than the lateral hardness of quenching part.3) owing to changed the spray angle of jet pipe, the medium of ejection is contacted at an angle with the side of quenching part, increased infiltrating time and the area of medium, improved the cooling intensity that spray is quenched at quenching part cooling surface.4) present method is implemented simply not need a large amount of fund inputs.
Description of drawings
Fig. 1 is the side-view of the relative position synoptic diagram of quenching part and water pipe and jet pipe.
Fig. 2 is the vertical view of the relative position synoptic diagram of quenching part and water pipe and jet pipe.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As depicted in figs. 1 and 2, be the relative position synoptic diagram of quenching part and water pipe and jet pipe, wherein water pipe 1, jet pipe 2, the quenching part includes: the side, a left side (right side) 4 of the end face 3 of quenching part, quenching part, quenching part go up (descending) side 5.Water pipe 1 is installed in two, three or four sides in the zone of quenching, promptly corresponding with the side that needs refrigerative quenching part, jet pipe 2 is installed in the direction towards the zone of quenching on the water pipe 1, jet pipe 2 is that symmetric line and water pipe 1 are a angle with water pipe 1 with medullary ray A-A, the a angle is greater than 0 ° with less than 90 °, the medium of jet pipe 2 ejection and the end face of quenching part are 90 °-a angle, make the medium of ejection can not directly be sprayed onto the end face 3 of quenching part.Near the intermediary of water pipe 1 part (medullary ray A-A is symmetric line) jet pipe 2 and water pipe 1 are that a angle of symmetric line and water pipe is equal to or less than 90 ° with medullary ray A-A.The quenching part be placed on the quenching apparatus that is furnished with water pipe among, quenching part side is parallel with water pipe 1, the end face 3 of quenching part is vertical with water pipe 1.
An alloy steel forging is arranged, size: long 6000mm * wide 1500mm * thick 500mm, end face with wide 1500mm * thick 500mm after the forging cuts with a chainsaw, be heated to austenitizing temperature then after, forging is placed on carries out spray quenching on the quenching worktable and handle.The quenchant that adopts is a water.The structure of equipment is for being provided with the water pipe 1 of dense arrangement in two sides, zone of quenching, on the direction in the zone of quenching, jet pipe 2 is set at water pipe 1, the quenching part is placed on two sides and is provided with between the water pipe 1 of dense arrangement, side 4, the left side of quenching part (right side) is parallel with water pipe 1, the end face 3 of quenching part is vertical with water pipe 1, the direction of jet pipe 2 and water pipe 1 are a angle, a between greater than 0 ° and less than 90 ° between, the medium of jet pipe 2 ejection and the end face 3 of quenching part are 90 °-a angle.Concrete working process is: the quenchant water pipe 1 of flowing through, spray to the side, a left side (right side) 4 of quenching part by the jet pipe 2 that is a angle with water pipe 1, the medium of jet pipe 2 ejections and the end face 3 of quenching part are 90 °-a angle, the result is that the side, a left side (right side) 4 of quenching part is well cooled off, and the end face 3 of quenching part has been avoided the rimose generation owing to not reduced speed of cooling by the quenchant direct injection.
Material is the axle class part of carbon steel, size: Φ 500mm * 6000mm, be heated to austenitizing temperature after, in the horizontal quenching zone that is suspended on quenching apparatus of axle, quenching technology is to take hydrojet, immersion liquid and air cooling array mode to quench, and quenchant is a water-soluble quenching medium.Wherein the structure of spray quenching equipment is: arrange the water pipe 1 of dense arrangement in the both sides of the length direction in the zone of quenching and be the jet pipe 2 of a angle with water pipe 1, a between greater than 0 ° and less than 90 ° between.Concrete working process is: the quenchant water pipe 1 of flowing through is gone up (descending) side 5 by what the jet pipe 2 that is a angle with water pipe 1 sprayed to the side 4, a left side (right side) of quenching part and quenching part, the quenchant of jet pipe 2 ejections and the end face 3 of quenching part are 90 °-a angle, the result is that the side 4, a left side (right side) of quenching part and (descending) side 5 of going up of quenching part are well cooled off, and the end face 3 of quenching part has been avoided the rimose generation owing to not reduced speed of cooling by the quenchant direct injection.
The quenching object is an alloy steel forging, size: long 5000mm * wide 2000mm * thick 300mm, two end faces with wide 2000mm * thick 300mm after the forging cut with a chainsaw, after being heated to austenitizing temperature then, forging is suspended in the quenching zone of quenching apparatus, quenching technology is to take hydrojet and air cooling array mode to quench, and quenchant is a water.Be the jet pipe 2 of a angle at the correspondence position layout water pipe 1 of going up (descend) side 5 of the side 4, a left side (right side) of quenching part and quenching part with water pipe, a between greater than 0 ° and less than 90 ° between.Concrete working process is: the quenchant water pipe 1 of flowing through is gone up (descending) side 5 by what the jet pipe 2 that is a angle with water pipe 1 sprayed to the side 4, a left side (right side) of quenching part and quenching part, the quenchant of jet pipe 2 ejections and the end face 3 of quenching part are 90 °-a angle, the result is that the side 4, a left side (right side) of quenching part and (descending) side 5 of going up of quenching part are well cooled off, and the end face 3 of quenching part has been avoided the rimose generation owing to not reduced speed of cooling by the quenchant direct injection.
Claims (7)
1, a kind of spray angle prevent to quench end face spray quenching rimose method of part that changes, it is characterized in that, the quenching part is placed among the quenching apparatus that is furnished with water pipe, the side of quenching part is parallel with water pipe, the end face of quenching part is vertical with water pipe, the quenchant water pipe of flowing through, spray to the side of quenching part by the jet pipe that is a angle with water pipe, a is between 0 °～90 °, because the end face of quenching part is vertical with water pipe, the quenchant of jet pipe ejection and the end face of quenching part are 90 °-a angle, the quenchant of jet pipe ejection just fails directly to be sprayed onto the end face of quenching part like this, the quench side of part of the speed of cooling of the end face of quenching part is slow, has avoided the rimose generation.
2, the change spray angle according to claim 1 end face spray quenching rimose method of part that prevents to quench is characterized in that described water pipe is installed in quench zone two, three or four sides, and is corresponding with the side that needs refrigerative quenching part.
3, the change spray angle according to claim 1 end face spray quenching rimose method of part that prevents to quench, it is characterized in that, described jet pipe, be installed in the direction on the water pipe towards the zone of quenching, jet pipe and water pipe are that symmetric line and water pipe are a angle respectively with medullary ray A-A, and angle a is between 0 °～90 °.
4, according to claim 1 or 3 described change spray angles prevent from the to quench end face spray quenching rimose method of part, it is characterized in that, the middle portion that is installed in water pipe be medullary ray A-A be the jet pipe of near zone of symmetric line and water pipe with medullary ray A-A be symmetric line and with a angle≤90 of water pipe °, be installed in the jet pipe of rest part of water pipe and a angle that water pipe with medullary ray A-A is symmetric line and water pipe between greater than 0 ° and less than 90 ° between.
5, the change spray angle according to claim 1 end face spray quenching rimose method of part that prevents to quench, it is characterized in that, described quenching part, its shape are rectangular parallelepiped, square, right cylinder or obform body, and the end face of quenching part is plane, curved surface or shaped face.
6, the change spray angle according to claim 1 end face spray quenching rimose method of part that prevents to quench, it is characterized in that, described quenching, its method of cooling that adopts are hydrojet or hydrojet and immersion liquid combination or hydrojet and air cooling combination or hydrojet, immersion liquid and air cooling combination.
7, the change spray angle according to claim 1 end face spray quenching rimose method of part that prevents to quench is characterized in that described quenchant is water or water-soluble quenching medium.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100370314A CN100434544C (en) | 2007-02-01 | 2007-02-01 | Method for preventing end-face spray quenching cracking of quenching piece by changing spray angle |
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| CNB2007100370314A CN100434544C (en) | 2007-02-01 | 2007-02-01 | Method for preventing end-face spray quenching cracking of quenching piece by changing spray angle |
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| CN100434544C CN100434544C (en) | 2008-11-19 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433419A (en) * | 2011-12-29 | 2012-05-02 | 上海交通大学 | Water-through quenching cooling device and method capable of realizing rapid cooling through slit water injection |
| CN103484630A (en) * | 2013-09-03 | 2014-01-01 | 上海交通大学 | Device for preventing cracking of water quenching end surfaces of shaft alloy steel part |
| CN105586475A (en) * | 2014-11-11 | 2016-05-18 | 高周波热錬株式会社 | Quenching device and quenching method |
| CN106987688A (en) * | 2017-04-18 | 2017-07-28 | 上海交通大学 | The method and device that hardening flaw is produced is judged by voice signal |
| CN108070693A (en) * | 2017-08-29 | 2018-05-25 | 东北大学 | A kind of cambered surface multi-angle array jetting nozzle and its application |
| CN108070710A (en) * | 2017-08-29 | 2018-05-25 | 东北大学 | A kind of steel plate temperature control process for quenching based on roller quenching machine |
| CN109957638A (en) * | 2019-03-06 | 2019-07-02 | 上海交通大学 | A kind of method that the horizontal water quenching of shaft forgings with holes avoids inner hole from cracking |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5478316A (en) * | 1977-12-03 | 1979-06-22 | Kawasaki Steel Co | Quenching of steel pipe |
| JP3536465B2 (en) * | 1995-08-29 | 2004-06-07 | 石川島播磨重工業株式会社 | Apparatus for introducing fatigue cracks in metal specimens |
| CN1211626A (en) * | 1997-09-18 | 1999-03-24 | 杨平生 | Quench hardening technique and device for cold-rolling roll |
| US6656413B2 (en) * | 2001-06-21 | 2003-12-02 | Can-Eng Furnaces Ltd | Method and apparatus for quenching metal workpieces |
| CN1250748C (en) * | 2002-09-05 | 2006-04-12 | 上海交通大学 | Large alloy steel member water quenching layer built self-tempering process |
-
2007
- 2007-02-01 CN CNB2007100370314A patent/CN100434544C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433419A (en) * | 2011-12-29 | 2012-05-02 | 上海交通大学 | Water-through quenching cooling device and method capable of realizing rapid cooling through slit water injection |
| CN102433419B (en) * | 2011-12-29 | 2013-08-07 | 上海交通大学 | Water-through quenching cooling device and method capable of realizing rapid cooling through slit water injection |
| CN103484630A (en) * | 2013-09-03 | 2014-01-01 | 上海交通大学 | Device for preventing cracking of water quenching end surfaces of shaft alloy steel part |
| CN105586475A (en) * | 2014-11-11 | 2016-05-18 | 高周波热錬株式会社 | Quenching device and quenching method |
| CN105586475B (en) * | 2014-11-11 | 2020-08-14 | 高周波热錬株式会社 | Quenching apparatus and quenching method |
| CN106987688A (en) * | 2017-04-18 | 2017-07-28 | 上海交通大学 | The method and device that hardening flaw is produced is judged by voice signal |
| CN108070693A (en) * | 2017-08-29 | 2018-05-25 | 东北大学 | A kind of cambered surface multi-angle array jetting nozzle and its application |
| CN108070710A (en) * | 2017-08-29 | 2018-05-25 | 东北大学 | A kind of steel plate temperature control process for quenching based on roller quenching machine |
| CN109957638A (en) * | 2019-03-06 | 2019-07-02 | 上海交通大学 | A kind of method that the horizontal water quenching of shaft forgings with holes avoids inner hole from cracking |
| US11085096B2 (en) | 2019-03-06 | 2021-08-10 | Shanghai Jiao Tong University | Method for preventing cracking along the surface at the inner hole of a hollow shaft during horizontal water quenching |
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| CN100434544C (en) | 2008-11-19 |
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