CN101352784B - Method for splicing 0Cr13 type ferritic stainless steel for explosive welding - Google Patents
Method for splicing 0Cr13 type ferritic stainless steel for explosive welding Download PDFInfo
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- CN101352784B CN101352784B CN 200810141254 CN200810141254A CN101352784B CN 101352784 B CN101352784 B CN 101352784B CN 200810141254 CN200810141254 CN 200810141254 CN 200810141254 A CN200810141254 A CN 200810141254A CN 101352784 B CN101352784 B CN 101352784B
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Abstract
The invention discloses a jointing method for a 0Cr13 type ferrite stainless steel used for explosion welding. A welding method of SMAW and an austenite welding material with ultra-low carbon are adopted to carry out front welding after carrying out tack welding on the 0Cr13 type ferrite stainless steel, then to carry out back welding and explosion welding and finally to carry out heat processing; a nondestructive testing is carried out if necessary, thus finishing manufacturing the compound material of the 0Cr13 type ferrite stainless steel with large area. The manufactured compound material does not need to remove the jointing welding line of a compound layer to carry out surfacing welding. The jointing method is simple and practical, thus not only improving the working environment and reducing the working intensity, but also greatly improving efficiency, can ensure the length of the welding line with a defect existing in a jointing joint after explosion welding is less than 5 percent of the length of the jointing line of a whole board; all the performance data of the welding joint can meet relevant index demands, thus basically solving the difficulty of cracking after explosion welding of the welding joint.
Description
Technical field
The present invention relates to a kind of explosive welding splicing process method of material, particularly a kind of explosive welding is answered layer 0Cr13 type ferritic stainless steel splicing process method with large tracts of land.
Background technology
The 0Cr13 stainless steel is a kind of ferrite-martensitic stain less steel, what account for the matrix major part is ferrite, but a spot of martensite significantly increases the intensity of steel, because this class steel has good heat resistance, often the form with the stainless steel/carbon composite plate is widely used in coke tower, in the petrochemical equipments such as DCL/Direct coal liquefaction device, because supply of material width is generally bigger, generally more than 1.5 meters, be subjected to the restriction of existing market 0Cr13 supply of material size, 0Cr13 will splice to satisfy the requirement of different specification size before manufacturing composite, 0Cr13 belongs to ferritic stainless steel, but contain a spot of martensite in the matrix, therefore the weldability of this steel is relatively poor, and multiple layer joints will be easy to tear through the strong shock wave effect of explosive welding in the production process of composite.
Because multiple layer 0Cr13 stainless steel will dock before explosive welding, and the as-welded crisp martensitic structure firmly that is organized as in the 0Cr13 stainless steel hot zone of influence, in the splicing under continuous Thermal Cycle effect, cause the plasticity toughness of welding point to reduce easily, may cause 475 ℃ of embrittlement, fragility phase and crystal grain are thick etc., after explosive welding, because the intrinsic inductile of ferrite, and Thermal Cycle the heat affected area grain growth and the carbon that cause, nitride gathers at crystal boundary, under the very big background of 0Cr13 stainless steel joints constraint (restraint) degree, through the impact of detonation wave, very easily crack, and mechanical property will further worsen.
At this situation, the solution of composite plate manufacturing firm is earlier the 0Cr13 stainless steel not to be filled silk from melting welding, digging mill from the melting welding seam after explosive welding handles, again built-up welding then, this situation has not only increased labour intensity, worsened work situation, and production efficiency is low, the production cost height.
Summary of the invention
Technical problem to be solved by this invention provides a kind of explosive welding and answers layer 0Cr13 type ferritic stainless steel splicing process method with large tracts of land, solve problems such as process labour intensity was big in the past, work situation is abominable, production efficiency is low, the production cycle is long, make the multiple layer of the large tracts of land 0Cr13 type ferritic stainless steel splicing welding joint that utilizes this method to produce after explosive welding, not need to dig built-up welding again.
For solving the problems of the technologies described above, the technical solution used in the present invention is: adopt the welding method of SMAW, carry out face bonding after using the ultra-low carbon austenitic wlding to large tracts of land 0Cr13 type ferritic stainless steel tack welding and connect, carry out the reverse side welding then, carry out explosive welding again, the heat treatment of annealing at last.Carry out Non-Destructive Testing in case of necessity again, promptly finished the manufacturing of large tracts of land 0Cr13 type ferrite stainless steel composite material.
Described ultra-low carbon austenitic wlding can be the stainless steel wlding of good toughness, preferred especially E309L wlding.
Process of the present invention can be carried out back root cleaning after the positive welding as required, particularly for mother metal thickness more than or equal to the 3mm material, need back root cleaning after the positive welding.Can carry out Non-Destructive Testing as required after the back root cleaning.
Process of the present invention can just be carried out explosive welding after the reverse side welding, but can not smoothed under the extraordinary situation of plate shape after smoothing.
Process of the present invention, the annealing heat-treat condition can be the common common method for annealing that can eliminate stainless steel material stress, as long as reach the result who eliminates stress.Preferred condition is 800 ℃ of left and right sides stress-removal heat treatments, and temperature retention time is 2 hours, the cooling of coming out of the stove.The composite of annealing behind the heat treatment step can be smoothed operation as required, directly carries out Non-Destructive Testing behind the heat treatment step of also can annealing.
The use of can interosculating of these preferred operations also can basic operation be used in combination separately.
Process program of the present invention can also apply to the big material of other fragility and get on except 0Cr13, particularly on the 0Cr13 type ferrite stainless steel material, as 405 stainless steels.
Advantage of the present invention is that equipment investment is little, and environmental pollution is little, and labour cost is low, can carry out many plate splicings simultaneously, and convenient production raised the efficiency
The 0Cr13 composite that adopts this method to make does not need to remove multiple layer splicing welding joint, built-up welding again.This joining method is simple, practical, not only improved work situation, reduced labour intensity, and improved production efficiency greatly, can guarantee that the 0Cr13 joints after explosive welding exists the fusion length of defective less than 5% of whole plate splicing seams length, the every performance data of welding point all satisfies the index of correlation requirement, has solved the difficult problem that the 0Cr13 welding point ftractures after explosive welding substantially.
The specific embodiment
Embodiment 1
Large tracts of land 0Cr13 composite is made.Two 0Cr13 sizes to be spliced are respectively 3 * 1229 * 6250mm and 3 * 1000 * 6250mm, two blocks of 0Cr13 plates are placed on the backing plate dirts such as the oil before the welding in cleaning groove district and the peripheral 20mm scope, water, rust; Use the wlding E309L after drying, two blocks of plates to be welded are widened welding, at first carry out the assembling and positioning weldering, the fit-up gap is 1.8～2.0mm, and tack weld length is 10～15mm, and spacing is 300～40mm; The front welding current is 90A, and weldingvoltage is 24V; Back root cleaning after positive welding is finished is through the Non-Destructive Testing zero defect; Carry out the reverse side welding after the Non-Destructive Testing, the reverse side welding current is 96A, and weldingvoltage is 24V; Carry out Non-Destructive Testing, smoothing after weld reinforcement polished; Carry out explosive welding after plate shape meets the demands, base material is 16MnR, is of a size of 26 * 2210 * 6230mm; After the explosive welding the multiple layer of 0Cr13 welding point carried out Non-Destructive Testing, the Non-Destructive Testing result satisfies the requirement of JB/T4730-2005II level; 780 ℃ of stress-removal heat treatments are carried out to composite plate in the qualified back of Non-Destructive Testing, and temperature retention time is 2 hours, come out of the stove and smooth after being cooled to 40 ℃; Non-Destructive Testing is carried out to multiple layer 0Cr13 joints in composite plate heat treatment smoothing back, and the Non-Destructive Testing result shows: the 0Cr13 joints crackle rate after explosive welding is 98.8%, defect area is dug mill repair; Mechanical property result all satisfies the relevant criterion requirement.The manufacturing of large tracts of land 0Cr13 composite is finished.
Embodiment 2
Large tracts of land 0Cr13 composite is made.Two 0Cr13 sizes to be spliced are respectively 3 * 1030 * 7130mm and 3 * 1000 * 7130mm, two blocks of 0Cr13 plates are placed on the backing plate dirts such as the oil before the welding in cleaning groove district and the peripheral 20mm scope, water, rust; Use the wlding E309L after drying, two blocks of plates to be welded are widened welding, at first carry out the assembling and positioning weldering, the fit-up gap is 2.0～2.2mm, and tack weld length is 10～15mm, and spacing is 300～400mm; The front welding current is 92A, and weldingvoltage is 24V; Back root cleaning after positive welding is finished is through the Non-Destructive Testing zero defect; Carry out the reverse side welding after the Non-Destructive Testing, the reverse side welding current is 98A, and weldingvoltage is 24V; Carry out Non-Destructive Testing, smoothing after weld reinforcement polished; Carry out explosive welding after plate shape meets the demands, base material is 20R, is of a size of 28 * 2010 * 7110mm; After the explosive welding the multiple layer of 0Cr13 welding point carried out Non-Destructive Testing, the Non-Destructive Testing result satisfies the requirement of JB/T4730-2005II level; 800 ℃ of stress-removal heat treatments are carried out to composite plate in the qualified back of Non-Destructive Testing, and temperature retention time is 2 hours, come out of the stove and smooth after being cooled to 50 ℃; Non-Destructive Testing is carried out to multiple layer 0Cr13 joints in composite plate heat treatment smoothing back, and the Non-Destructive Testing result shows: the 0Cr13 joints crackle rate after explosive welding is 98.5%, defect area is dug mill repair; Mechanical property result all satisfies the relevant criterion requirement.The manufacturing of large tracts of land 0Cr13 composite is finished.
Embodiment 3
Large tracts of land 0Cr13 composite is made.Two 0Cr13 sizes to be spliced are respectively 3 * 1300 * 8450mm and 3 * 900 * 8450mm, two blocks of 0Cr13 plates are placed on the backing plate dirts such as the oil before the welding in cleaning groove district and the peripheral 20mm scope, water, rust; Use the wlding E309L after drying, two blocks of plates to be welded are widened welding, at first carry out the assembling and positioning weldering, the fit-up gap is 2.0～2.5mm, and tack weld length is 10～15mm, and spacing is 300～400mm; The front welding current is 95A, and weldingvoltage is 24V; Back root cleaning after positive welding is finished is through the Non-Destructive Testing zero defect; Carry out the reverse side welding after the Non-Destructive Testing, the reverse side welding current is 102A, and weldingvoltage is 24V; Carry out Non-Destructive Testing, smoothing after weld reinforcement polished; Carry out explosive welding after plate shape meets the demands, base material is 16MnR, is of a size of 16 * 2180 * 8430mm; After the explosive welding the multiple layer of 0Cr13 welding point carried out Non-Destructive Testing, the Non-Destructive Testing result satisfies the requirement of JB/T4730-2005II level; 800 ℃ of stress-removal heat treatments are carried out to composite plate in the qualified back of Non-Destructive Testing, and temperature retention time is 1.5 hours, come out of the stove and smooth after being cooled to 50 ℃; Non-Destructive Testing is carried out to multiple layer 0Cr13 joints in composite plate heat treatment smoothing back, and the Non-Destructive Testing result shows: the 0Cr13 joints crackle rate after explosive welding is 98.2%, defect area is dug mill repair; Mechanical property result all satisfies the relevant criterion requirement.The manufacturing of large tracts of land 0Cr13 composite is finished.
Embodiment 4
Large tracts of land 0Cr13 composite is made, and with embodiment 3, but the sheet material of splicing is 405 stainless steels.
Claims (9)
1. splicing 0 Cr 13 type ferritic stainless steel for explosive welding method is characterized in that comprising following operation:
-adopt the welding method of SMAW, carry out face bonding after using the ultra-low carbon austenitic wlding to the multiple layer of large tracts of land 0Cr13 type ferritic stainless steel tack welding and connect;
-carry out reverse side then to weld;
-carry out explosive welding then;
-the heat treatment of annealing.
2. according to the described splicing 0 Cr 13 type ferritic stainless steel for explosive welding method of claim 1, it is characterized in that: more than or equal to the 3mm material, need back root cleaning after the positive welding for mother metal thickness.
3. according to the described splicing 0 Cr 13 type ferritic stainless steel for explosive welding method of claim 1, it is characterized in that: need Non-Destructive Testing after the positive welding.
4. according to the described splicing 0 Cr 13 type ferritic stainless steel for explosive welding method of claim 2, it is characterized in that: need carry out Non-Destructive Testing after the back root cleaning.
5. according to the described splicing 0 Cr 13 type ferritic stainless steel for explosive welding method of claim 1, it is characterized in that: the reverse side welding is after just carry out explosive welding after the smoothing.
6. according to the described splicing 0 Cr 13 type ferritic stainless steel for explosive welding method of claim 1, it is characterized in that: composite need be smoothed operation behind the heat treatment step of annealing.
7. according to the described splicing 0 Cr 13 type ferritic stainless steel for explosive welding method of claim 1, it is characterized in that: carry out the Non-Destructive Testing operation behind the heat treatment step of annealing.
8. according to the described splicing 0 Cr 13 type ferritic stainless steel for explosive welding method of claim 1, it is characterized in that: described ultra-low carbon austenitic wlding is the E309L wlding.
9. according to the described splicing 0 Cr 13 type ferritic stainless steel for explosive welding method of claim 1, it is characterized in that: described annealing heat-treat condition is 800 ℃ of left and right sides stress-removal heat treatments, and temperature retention time is 2 hours.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810141254 CN101352784B (en) | 2008-08-25 | 2008-08-25 | Method for splicing 0Cr13 type ferritic stainless steel for explosive welding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810141254 CN101352784B (en) | 2008-08-25 | 2008-08-25 | Method for splicing 0Cr13 type ferritic stainless steel for explosive welding |
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| CN101352784A CN101352784A (en) | 2009-01-28 |
| CN101352784B true CN101352784B (en) | 2010-06-30 |
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| CN 200810141254 Expired - Fee Related CN101352784B (en) | 2008-08-25 | 2008-08-25 | Method for splicing 0Cr13 type ferritic stainless steel for explosive welding |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102049626A (en) * | 2010-11-26 | 2011-05-11 | 西安天力金属复合材料有限公司 | Preparation method of ultra-thick titanium/steel composite tube plate with large area and high properties |
| CN109332923B (en) * | 2018-09-26 | 2021-08-10 | 中国船舶重工集团公司第七二五研究所 | Automatic splicing method of ferritic stainless steel for explosive welding |
| CN109048110A (en) * | 2018-09-27 | 2018-12-21 | 舞钢神州重工金属复合材料有限公司 | Wide format ferritic stainless steel Explosive Welding production technology |
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