CN101445863B - Method for reducing unevenness of composite stainless steel plates in manufacturing composite steel plates - Google Patents
Method for reducing unevenness of composite stainless steel plates in manufacturing composite steel plates Download PDFInfo
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- CN101445863B CN101445863B CN 200810080236 CN200810080236A CN101445863B CN 101445863 B CN101445863 B CN 101445863B CN 200810080236 CN200810080236 CN 200810080236 CN 200810080236 A CN200810080236 A CN 200810080236A CN 101445863 B CN101445863 B CN 101445863B
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Abstract
The invention discloses a method for reducing unevenness of composite stainless steel plates in manufacturing composite steel plates. The method is characterized in that a plurality of composite stainless steel plates are stacked up with support members among the composite stainless steel plates, needle punched cotton is filled on the upside and the underside of the support members, base plates of the composite stainless steel plates face down, the support members for supporting the composite stainless steel plates move inwards, edges of the composite stainless steel plates are sagged by heat treatment at the temperature of 800-1070 DEG C by virtue of dead weight of the composite stainless steel plates, and the edges of the composite stainless steel plates upwarp for prespringing after being taking out from a heat treatment furnace and cooled, thus reducing transverse unevenness after the heat treatment. The distance from the outer side edge of a support member to the long edge of a composite stainless steel plate is 300-400mm. The method reduces the unevenness of the heat treated composite stainless steel plates, flattening is easy, and the appearance quality is easy to meet technical indexes and user requirements.
Description
Technical field
The present invention relates to reduce in a kind of process of making clad steel plate the method for stainless compound steel plate roughness, specifically is to make in the manufacturing processed of stainless compound steel plate in explosive welding, reduces the method for stainless compound steel plate roughness.
Background technology
The roughness of clad steel plate is an important indicator of evaluating combined steel plate visual appearance.The clad steel plate roughness is more little, easy more moulding when clad steel plate following process (for example dig the limit and play groove, jam welding), and splicing is convenient.If the clad steel plate roughness is big, increased the difficulty of clad steel plate following process, as connecing when weldering owing to reasons such as butt weld misalignments, also need to add external force auxiliary (as fixed-type etc.) during splicing with very heavy pressing spot welding afterwards, difficulty of processing is bigger, visual appearance is difficult to reach technical indicator and customer requirements, and it is even more important to stainless compound steel plate to reduce roughness.The roughness of the stainless compound steel plate that existing explosive welding is made is bigger, generally reaches 5mm/m, and logical wide roughness will reach more than the 12mm/m, not reach user's service requirements, must manage to reduce the roughness of the stainless compound steel plate that explosive welding makes.The method of existing reduction clad steel plate is directly to carry out leveling after the clad steel plate thermal treatment under levelling arm or pressing machine, and not tight to shove charge control during thermal treatment, the clad steel plate warpage is big, and the leveling difficulty is big, and often.
Summary of the invention
In order to overcome the deficiency that reduces the method for stainless compound steel plate roughness in the existing process of making clad steel plate, the invention provides the method that reduces the stainless compound steel plate roughness in the process of the little manufacturing clad steel plate of a kind of leveling difficulty.
The method of this reduction stainless compound steel plate roughness is to make in the process of stainless compound steel plate in blast, adds heat treatment step after the explosive welding, reduces the roughness of stainless compound steel plate in heat treated process, detects a flaw after the thermal treatment again.
The method of this reduction stainless compound steel plate roughness is to make in the process of stainless compound steel plate in blast, and the method that stainless compound steel plate is made in this blast comprises following sequential steps:
The surface of I, polishing substrate and compound plate makes the bonding surface surface roughness value of substrate, compound plate be not more than R
a6.3 μ m;
Compound plate and capable group of substrate that II, matching board require use technology are right;
III, explosive welding are with low-detonation velocity anfo explosive with compound plate and substrate explosive welding together;
IV, thermal treatment
Explosive welding stainless compound steel plate together is placed on thermal treatment in the car-type heat treating furnace;
V, harmless UT (Ultrasonic Testing) detect
For guaranteeing that the clad steel plate bonding interface is realized reliably, metallurgical welding uniformly,, utilize ultrasonic reflectoscope to detect a flaw to the technical requirements of stainless compound steel plate according to JB4730-2005.
VI, according to the requirement of GB/T709-2006, clad steel plate is tested.
The clad steel plate of VII after will detecting a flaw on the levelling arm carries out finishing.
The method of this reduction stainless compound steel plate roughness is in the process of making clad steel plate, improves heat treating method and finely finishing method.
(1) heat treated feature is:
Pad between some stainless compound steel plates is gone up fulcrum to be piled up up and down together, the full acupuncture cotton of the top and following pad of fulcrum, the substrate of stainless compound steel plate down, move in the fulcrum of support stainless compound steel plate, utilize the deadweight of stainless compound steel plate, when 800 ℃～1070 ℃ thermal treatment, make stainless compound steel plate limit portion sagging naturally, stainless compound steel plate is after going out the heat treatment furnace cooling, because shrinkage coefficient is different during two kinds of material cooled of substrate and compound plate, stainless steel clad plate limit portion upwarps reversal deformation, thereby reaches the effect that reduces horizontal roughness after the thermal treatment.But, when thermal treatment, should operate in the requsst listed below for avoiding having side effects.
The outer side edges that a requires fulcrum is 300mm～400mm apart from the distance on the long limit of stainless compound steel plate laterally promptly, prevent that steel plate from toppling over, thus the strut member symmetry of will trying one's best during shove charge, the maintenance balance;
B when preventing to support stainless compound steel plate, the surface of the stressed excessive damage stainless compound steel plate of Stainless Compound Steel Plate surface local, as prop up into cheating on the stainless compound steel plate surface, number of strut will be as much as possible, it is partial stressed to reduce strut member.
During the thickness δ of c stainless compound steel plate≤18mm, shove charge quantity is no more than 12; During thickness 18＜δ≤25mm, shove charge quantity is no more than 10; During thickness δ＞25mm, shove charge quantity is no more than 8.Too much because of batch, stainless compound steel plate time in the stove is oversize, and vertically long limit is curved excessively down, and cooling back anti-deformation is excessive, is difficult to operation when causing follow-up leveling finishing.
D is general, and fulcrum is along vertical (length direction) unified Zhi Chengsan row of stainless compound steel plate, and (two rows or three rows are all right) is even, symmetrical; Strut member spacing longitudinally is 800mm～1000mm.
Neat specification is unified during e thermal treatment shove charge.
During the width of f stainless compound steel plate≤1500mm, strut member is not less than 300mm apart from the distances on two long limits; During the width of stainless compound steel plate＞1500mm, strut member is not less than 400mm apart from the distances on two long limits.
Strut member as fulcrum can be used refractory brick, high temperature resistant ironcasting.
(2) feature of finishing is:
For the stainless compound steel plate of thickness greater than 20mm, the stainless compound steel plate after the thermal treatment is carried out leveling on seven roller levelling arms, leveling speed is 5m/min～7m/min, leveling is 2～4 times back and forth.
The stainless compound steel plate that thickness is not more than 20mm (less) in explosion, mend by replacing a damaged part in the processes such as weldering, thermal treatment and can produce warpage, adopt conventional aligning method to be difficult to leveling, leveling to this kind stainless compound steel plate, below the stainless compound steel plate of leveling, mat thickness is that the steel plate of 20mm～30mm overlaps both, and total thickness is no more than levelling arm leveling ability.Backing plate is down, by the levelling arm leveling.
Owing to reduce the method for stainless compound steel plate roughness in the process of this manufacturing clad steel plate, when thermal treatment, stainless compound steel plate is heating up and the opposite distortion of temperature-fall period generation, laterally roughness is 7.0mm/m～10.0mm/m, compare with the horizontal roughness 15.0mm/m～30mm/m after the existing thermal treatment, obviously reduced the roughness of heat treated composite stainless steel plates, leveling is easy, and number of times has reduced the difficulty of clad steel plate following process less, and visual appearance reaches technical indicator and customer requirements easily.
Description of drawings
Strut member was at the distribution reference drawing of stainless compound steel plate when Fig. 1 was thermal treatment.
The stacking reference drawing of stainless compound steel plate in heat treatment furnace when Fig. 2 is thermal treatment.
When Fig. 3 is the finishing leveling, at the placement reference drawing of levelling arm.
Among the above-mentioned figure:
1-stainless compound steel plate 2-brick 3-brick 4-brick 5-pedestal
The cotton 8-stainless compound steel plate of the cotton 7-acupuncture of 6-acupuncture 9-brick
10-stainless compound steel plate 11-steel plate 12-roll 13-roll
Embodiment
Describe the embodiment that reduces the method for stainless compound steel plate roughness in the process of this manufacturing clad steel plate in detail below in conjunction with embodiment and accompanying drawing thereof, but the method for reduction stainless compound steel plate roughness is not limited to following embodiment in the process of this manufacturings clad steel plate.
Following embodiment mainly makes in the clad steel plate process explosive welding, and the feature in thermal treatment and the finishing process is described.
Embodiment one
The material of the substrate of stainless compound steel plate is the 16MnR of thick 26mm, and the material of compound plate is the 0Cr18Ni9 of thick 3mm, and long is 2000mm, wide is 1600mm, the last brick of pad is piled up together between totally 8, and logical wide roughness is 10mm/m～12mm/m, adopts same explosion welding method and heat treating method.
(1) heat treated feature is;
During 1 shove charge, last, as strut member such as brick 2, strut member vertically is two rows along stainless compound steel plate 1 to substrate with brick at following compound plate, and layout is even, symmetrical; Spacing between strut member brick 2 and the brick 3 is 1000mm, sees Fig. 1.
2 as cushioning the acupuncture cotton between the brick of strut member and the stainless compound steel plate, as cushioning acupuncture cotton 6 between brick 2 and the stainless compound steel plate 1, sees Fig. 2.
3, the center of brick 2 is that strut member is 400mm apart from long back gauge.
To be contained in clad steel plate in the car-type heat treating furnace 920 ℃ of thermal treatments, soaking time 45 minutes; Stainless compound steel plate is going out heat treatment furnace blowing cooling, and after heat treatment, the horizontal roughness of stainless compound steel plate is 7.0mm/m～10.0mm/m.
(2) feature of finishing is:
Stainless compound steel plate after the thermal treatment is carried out leveling on seven roller levelling arms, leveling speed is 6m/min, and leveling is 3 times back and forth, and each volume under pressure can not be too big.The logical wide roughness of clad steel plate adopts 2 meters leveling rulers to measure behind the leveling, and horizontal maximum roughness is 3mm (being 1.5mm/m).
Embodiment two
The material of the substrate of stainless compound steel plate is the 16MnR of thick 16mm, and the material of compound plate is the 0Cr18Ni9 of thick 3mm, grows to be 2000mm, and wide is 1400mm, and the last brick of pad is piled up together between totally 10, adopts same explosion welding method and heat treating method.
(1) heat treated feature is:
During 1 shove charge, last, as strut member, strut member laterally is three rows along stainless compound steel plate to substrate, vertically is two rows with brick at following compound plate, and layout is even, symmetrical; Spacing between two strut members is 1000mm longitudinally, can be referring to Fig. 1.
2 as cushioning the acupuncture cotton between the brick of strut member and the stainless compound steel plate, can be referring to Fig. 2.
3, be 300mm as the center of the brick of strut member by the distance on the vertical limit of stainless compound steel plate.
To be contained in clad steel plate in the car-type heat treating furnace 920 ℃ of thermal treatments, soaking time 30 minutes; Stainless compound steel plate is in the blowing cooling of coming out of the stove.After heat treatment, the horizontal roughness of stainless compound steel plate is 7.0mm/m-10.0mm/m.
(2) feature of finishing is:
During finishing, mat thickness is the steel plate 11 of 20mm below the stainless compound steel plate 10 after thermal treatment, stainless compound steel plate 11 and steel plate 12 is overlapped together on seven roller levelling arms carry out leveling, see Fig. 3, leveling speed is 6m/min, and leveling is 3 times back and forth, and each volume under pressure can not be too big.The logical wide roughness of clad steel plate adopts 2 meters leveling rulers to measure behind the leveling, and horizontal maximum roughness is 3mm (being 1.5mm/m).
The present invention mainly is the method that reduces the logical wide roughness of stainless compound steel plate.
Annotate: according to GB/T709-2006, logical wide roughness is meant the whole roughness of steel plate width direction.
Claims (3)
1. reduce the method for stainless compound steel plate roughness in the process of making clad steel plate, it is characterized in that: in heat treatment step, pad upper supporting piece between every of some stainless compound steel plate is piled up up and down together, the full acupuncture cotton of the top and following pad of strut member, the substrate of stainless compound steel plate down, move in the strut member of support stainless compound steel plate, utilize the deadweight of stainless compound steel plate, during thermal treatment, stainless compound steel plate limit subordinate is hung down, stainless compound steel plate is after going out the heat treatment furnace cooling, the compound limit of stainless steel portion upwarps reversal deformation, thereby reduce horizontal roughness after the thermal treatment, the outer side edges of strut member is 300mm～400mm apart from the distance on the long limit of stainless compound steel plate;
During the thickness δ of stainless compound steel plate≤18mm, shove charge quantity is no more than 12;
During thickness 18＜δ≤25mm, shove charge quantity is no more than 10;
During thickness δ＞25mm, shove charge quantity is no more than 8;
During the width of stainless compound steel plate≤1500mm, the outer side edges of strut member is not less than 300mm apart from the distance on long limit; During the width of stainless compound steel plate＞1500mm, the outer side edges of strut member is not less than 400mm apart from the distance on long limit.
2. reduce the method for stainless compound steel plate roughness in the process of manufacturing clad steel plate according to claim 1, it is characterized in that: for the stainless compound steel plate of thickness greater than 20mm, stainless compound steel plate after the thermal treatment is carried out leveling on seven roller levelling arms, leveling speed is 5m/min～7m/min, and leveling is 2～4 times back and forth.
3. reduce the method for stainless compound steel plate roughness in the process of manufacturing clad steel plate according to claim 1, it is characterized in that: the stainless compound steel plate that thickness is not more than 20mm in explosion, mend by replacing a damaged part in weldering, the heat treatment process and can produce warpage, below the stainless compound steel plate of leveling, mat thickness is that the steel plate of 20mm～30mm overlaps both, total thickness is no more than levelling arm leveling ability, backing plate is down, by the levelling arm leveling.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810080236 CN101445863B (en) | 2008-12-20 | 2008-12-20 | Method for reducing unevenness of composite stainless steel plates in manufacturing composite steel plates |
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| CN 200810080236 CN101445863B (en) | 2008-12-20 | 2008-12-20 | Method for reducing unevenness of composite stainless steel plates in manufacturing composite steel plates |
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| CN101445863A CN101445863A (en) | 2009-06-03 |
| CN101445863B true CN101445863B (en) | 2011-04-27 |
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| CN101954473B (en) * | 2009-07-15 | 2013-04-03 | 厉正 | Die-casting manufacturing process for die-cast complex bottom pot |
| CN104475989B (en) * | 2014-12-11 | 2016-08-24 | 重庆东京散热器有限公司 | A kind of oil cooler using carbon-point dries Welding |
| CN113523656B (en) * | 2021-07-05 | 2023-01-17 | 江苏徐工工程机械研究院有限公司 | Welding reversible deformation design method for structural part |
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