CN109048035B - Explosion composite structure of broad titanium steel composite board and preparation method of broad titanium steel composite board - Google Patents
Explosion composite structure of broad titanium steel composite board and preparation method of broad titanium steel composite board Download PDFInfo
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- CN109048035B CN109048035B CN201811085480.0A CN201811085480A CN109048035B CN 109048035 B CN109048035 B CN 109048035B CN 201811085480 A CN201811085480 A CN 201811085480A CN 109048035 B CN109048035 B CN 109048035B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/06—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
- B23K20/08—Explosive welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/24—Preliminary treatment
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- Pressure Welding/Diffusion-Bonding (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses an explosion composite structure of a wide titanium steel composite plate and a preparation method of the wide titanium steel composite plate, wherein the composite structure comprises a base plate and a titanium composite plate, the titanium composite plate is a plurality of titanium plates spliced by argon arc welding or plasma welding, and welding seams which are polished to be flush with a base material are arranged between every two titanium plates through a polishing machine; the titanium cladding plate is positioned above the base plate, a supporting sheet is arranged between the titanium cladding plate and the base plate to separate the titanium cladding plate from the base plate, explosive is arranged above the titanium cladding plate, and an electric detonator is arranged above the explosive; and a buffer strip is arranged above the welding line, separates the welding line from the explosive, and the width of the buffer strip is 2-3 times of the width of the welding line. The invention provides a broad titanium steel composite board explosion composite structure for protecting the position of a welding line and overcoming the problems of cracks and breakage at the welding line and a preparation method of the broad titanium steel composite board, and overcomes the defects that the welding line is always cracked or broken in the explosion welding process of the conventional broad titanium steel composite board, the welding line is not attached to the welding line of the welded titanium board after the explosion and the like.
Description
Technical Field
The invention belongs to the field of manufacturing of explosion welding metal composite plates, and particularly relates to an explosion composite structure of a wide titanium steel composite plate and a preparation method of the wide titanium steel composite plate.
Background
The titanium/steel composite plate has good corrosion resistance and cost performance, and has wide application market in the industries of chemical industry, petroleum, steam turbine condensers, electric power and the like. With the rapid development of the chemical industry, the very obvious trend is the enlargement, the complexity and the diversification of chemical equipment, so that the requirement on the size of the titanium steel composite material is also increasing. For the titanium steel composite board with the width of more than 1.5m, due to the limitation of the current market supply size, the titanium steel composite board is spliced before explosion welding so as to meet the requirements of different specifications and sizes. However, since the metal of the spliced weld joint is cast, the mechanical property of the metal is weaker than that of the base titanium material, and cracks or breaks are often generated under the action of explosion load, and analysis, demonstration and experiment are carried out on the phenomenon document, namely explosion welding and explosion composite material, P157. In order to avoid the effect of detonation wave load on the titanium welding seam, the document "explosion welding and explosion composite material, P167" describes a method, wherein two titanium plates to be splice welded are respectively or simultaneously explosion-composited on the same substrate, and the two titanium plates are welded after explosion compositing, so that cracks generated by the titanium plate welding seam under the effect of detonation wave load are avoided, but the problem is that the explosion welding mode can form the non-lamination defect under the titanium plate welding seam, and the defect is not allowed for tube plates and seal plates although the titanium plate welding seam is allowed for common equipment such as low-pressure containers. In the process, although the titanium steel composite board with the explosion welding width being smaller than 1.5m and without the welding seam is mature, the titanium steel composite board with the explosion welding width being larger than 1.5m and with the welding seam has a plurality of problems to be solved in the technology.
Disclosure of Invention
The invention aims to provide a broad titanium steel plate explosion composite structure capable of protecting the position of a welding line and overcoming the problems of cracks and breakage at the welding line and a preparation method of a broad titanium steel composite plate, and overcomes the defects that the welding line is often cracked or broken in the explosion welding process of the conventional broad titanium steel composite plate, the welding line is not attached to the welding line of the welded titanium plate after the explosion and the like.
In order to achieve the above object, the technical scheme of the present invention is as follows: the composite structure comprises a base layer plate and a titanium composite plate which are arranged on a foundation, wherein the titanium composite plate is a plurality of titanium plates spliced by argon arc welding or plasma welding, and welding seams which are polished to be flush with a base metal are arranged between every two titanium plates through a polishing machine; the titanium cladding plate is positioned above the base plate, a supporting sheet is arranged between the titanium cladding plate and the base plate to separate the titanium cladding plate from the base plate, explosive is arranged above the titanium cladding plate, and an electric detonator is arranged above the explosive; and a buffer strip is arranged above the welding line, separates the welding line from the explosive, and the width of the buffer strip is 2-3 times of the width of the welding line.
The buffer strip is made of a titanium plate or a stainless steel plate, the width of the buffer strip covers a welding line and a heat affected zone of the titanium plate, the thickness of the buffer strip is 20-40 mm, the thickness of the buffer strip is 1-2 mm, the length of the buffer strip is equal to the length of the welding line, and the center line of the buffer strip is aligned with the center line of the welding line.
The supporting sheet is made of V-shaped titanium strips, the thickness is 0.2-0.3 mm, the gap height is 6-10 mm, the arrangement interval is 200-300 mm, and the supporting sheet is far away from the welding seam and the heat affected zone of the titanium plate.
The base plate is made of Q245R or Q345R and is arranged on the sandy soil foundation.
The explosive is a powdery emulsion explosive, perlite is added to adjust the explosion speed of the explosive to 2000-2500 m/s, the explosive is distributed on the titanium clad plate and the welding seam buffer strip, and the thickness of the distributed explosive is 30-40 mm.
A method for preparing a broad titanium steel composite plate by using a broad titanium steel composite plate explosive composite structure comprises the following steps:
step 01) welding the single titanium plate into a titanium clad plate by argon arc welding or plasma welding, polishing both sides of the welding seam to be level with a titanium plate parent metal by using a polishing machine, polishing the surface to be combined of the titanium clad plate by using a kiloimpeller, and exposing a fresh metal layer; adhering the buffer strip to a welding seam on one side contacting with the explosive by using an adhesive;
step 02) assembling a wide titanium steel plate explosion composite structure on a sandy soil foundation, wherein a base plate, a titanium composite plate and explosives are sequentially arranged from bottom to top, a supporting sheet is arranged between the base plate and the titanium composite plate, and a detonation detonator is arranged at the upper end of the explosives;
step 03) detonating the detonator to detonate the explosive, pushing the titanium cladding plate to the base plate to obtain the wide-breadth titanium steel composite plate, transmitting high-pressure impact load generated by detonation of the explosive to the titanium welding seam through the buffer strip, absorbing the instant impact load by the buffer strip, and enabling the titanium welding seam not to directly bear high-temperature and high-pressure load generated by detonation load, wherein residual impact energy acting on the welding seam plays a role in accelerating the welding seam.
And performing heat treatment on the welding seams formed by splicing the titanium plates and then performing explosion welding.
The technical scheme of the invention has the following positive effects: the invention adopts the buffer strip to cover the position of the titanium plate spliced weld joint, so as to solve the problems that when explosive is exploded in the conventional production process, the high-temperature high-pressure shock wave load generated by the buffer strip directly acts on the position of the weld joint, the formed weld joint is forced to be deformed instantly and collide with a base plate at a high speed, the spliced weld joint is cast and has lower tensile strength and extension strength than the base metal, so that the tensile strength and the deformation cannot be borne so strongly, cracks or fractures are generated, particularly the spliced titanium plate weld joint is transverse to detonation wave, the probability of cracks or fractures of the weld joint is higher because the impact load borne by the weld joint is transverse, even if the welding joint of the titanium plate is subjected to overheating treatment after being spliced, the crack defect of the weld joint always occurs, and the area of cracks or fractures of the titanium weld joint always occurs, so that the quality of the wide-width titanium steel composite plate is reduced or scrapped, and huge economic loss is generated. According to the invention, the buffer strips are paved on the titanium plate welding seam, so that the detonation load is effectively prevented from directly acting on the titanium plate welding seam, and the possibility of cracking or breaking of the titanium plate welding seam is reduced or eliminated.
Drawings
FIG. 1 is a schematic structural view of an explosive composite structure of a wide titanium steel composite plate according to the invention.
FIG. 2 is a schematic layout of a support sheet on a base plate of the present invention.
Fig. 3 is a schematic perspective view of a support sheet according to the present invention.
The drawing is marked as follows: 1. a detonator; 2. an explosive; 3. a buffer strip; 4. welding seams; 5. titanium clad plate; 6. a support sheet; 7. a base plate; 8. sand foundation.
Detailed Description
The technical scheme of the invention is further described and illustrated below with reference to the accompanying drawings and the detailed description.
Example 1
As shown in fig. 1, 2 and 3, the composite structure comprises a base layer plate 7 and a titanium composite plate 5 which are arranged on a sand foundation 8, wherein the base layer plate is made of Q245R and has the specification of 28 multiplied by 3000 multiplied by 5000mm; the titanium multi-layer plate is formed by welding two titanium plates with the thickness of 3 multiplied by 1500 multiplied by 5000mm, a welding line 4 is welded by adopting plasma, the welding line width is 6-10 mm, the welding line and a heat affected zone width are 15mm, the welding line width refers to the maximum width of the welding line, for example, in fig. 1, the welding line is a trapezoid with a large upper bottom edge and a small lower bottom edge, and the welding line width refers to the width of the upper bottom edge of the trapezoid; the width of the weld in the present invention refers to the maximum width of the weld, whether the weld is V-shaped, X-shaped or U-shaped. The two sides of the welding seam (namely the upper end face and the lower end face of the welding seam) are polished to be flush with the base metal by using a hand-held sand belt welding seam polishing machine; the titanium composite plate is positioned above the base plate, a supporting sheet 6 is arranged between the titanium composite plate and the base plate and is separated from the base plate, the supporting sheet is of a titanium V shape, the thickness is 0.2mm, the height of the supporting sheet is 6mm, the length of the supporting sheet is 10mm, the supporting sheet is arranged on the polished base plate in a diamond shape, the arranging distance is 200-250 mm, and the arrangement range in a titanium layer spliced welding seam and a welding seam heat affected zone is avoided; a buffer strip 3 is stuck above the welding line through a 502 adhesive, the buffer strip is a titanium strip with the size of 1.5 multiplied by 20 multiplied by 5000mm, and the longitudinal center line of the buffer strip is level with the longitudinal center line of the welding line; arranging an explosive 2 on the titanium clad plate, adding perlite to adjust the explosion speed of the explosive to 2200-2500 m/s by using a powdery emulsion explosive, arranging the explosive on the titanium clad plate and the welding seam buffer strip, wherein the thickness of the arranged explosive is 32mm; a detonator 1 for detonating the explosive is arranged in the central position of the explosive.
The method for preparing the wide titanium steel composite board by using the explosive composite structure of the wide titanium steel composite board comprises the following steps:
step 01) welding two titanium plates into a titanium clad plate by plasma welding, polishing the double-sided positions of welding lines (namely the upper end face and the lower end face of the welding lines) to be flush with a titanium plate base metal by using a polishing machine, and polishing the surfaces to be combined (the upper end face and the lower end face of the titanium clad plate) of the titanium clad plate by using a kiloimpeller to expose fresh metal layers; adhering the buffer strip to the welding line by using 502 adhesive, wherein the longitudinal center line of the buffer strip is level with the longitudinal center line of the welding line;
step 02) assembling a wide titanium steel plate explosion composite structure on a sandy soil foundation, wherein a base plate, a titanium composite plate and explosives are sequentially arranged from bottom to top, a supporting sheet is arranged between the base plate and the titanium composite plate, and an explosion detonator is arranged at the central position of the upper end of the explosives;
step 03) detonating the detonator to detonate the explosive, namely completing the explosion welding of the wide titanium steel composite board, wherein the mechanical property of the wide titanium steel composite board after the explosion welding reaches or exceeds various standards specified by national standard NB/T47002.3, and the welding seam spliced by the multi-layer titanium board is detected by PT to not find crack generation; the titanium composite plate is pushed to the base plate after explosion welding to obtain a wide-breadth titanium steel composite plate, high-pressure impact load generated by explosive detonation is transmitted to the titanium welding line through the buffer strip, the instant impact load is mostly absorbed by the buffer strip, the titanium welding line does not directly bear high-temperature and high-pressure load generated by the detonation load, and the residual impact energy acted on the welding line plays a role in promoting the welding line to accelerate.
Example 2
As shown in fig. 1 and 3, the composite structure comprises a base layer plate 7 and a titanium composite plate 5 which are arranged on a sand foundation, wherein the base layer plate is made of Q345R and has the specification of 34 multiplied by 2400 multiplied by 5000mm; the titanium clad plate is formed by welding two titanium plates with the thickness of 5 multiplied by 1200 multiplied by 5000mm, wherein the welding line 4 is welded by argon arc, the width of the welding line is 10-15 mm, and the widths of the welding line and a heat affected zone are 30mm; the two sides of the welding seam are polished to be flush with the base metal by using a portable sand belt welding seam polishing machine; the titanium composite plate is positioned above the base plate, a supporting sheet 6 is arranged between the titanium composite plate and the base plate and is separated from the base plate, the supporting sheet is of a titanium V shape, the thickness is 0.3mm, the height of the supporting sheet is 10mm, the length of the supporting sheet is 10mm, the supporting sheet is arranged on the polished base plate in a diamond shape, the arranging distance is 250-300 mm, and the arrangement is avoided in the range of a titanium layer spliced weld joint and a weld joint heat affected zone; a buffer strip 3 is stuck above the welding line through a 502 adhesive, the buffer strip is a titanium strip with the size of 2 multiplied by 40 multiplied by 5000mm, and the longitudinal center line of the buffer strip is level with the longitudinal center line of the welding line; arranging an explosive 2 on the titanium clad plate, adding perlite to adjust the explosion speed of the explosive to 2000-2300 m/s by using a powdery emulsion explosive, arranging the explosive on the titanium clad plate and the welding seam buffer strip, wherein the thickness of the arranged explosive is 38mm; a detonator 1 for detonating the explosive is arranged in the central position of the explosive.
The method for preparing the wide titanium steel composite board by using the explosive composite structure of the wide titanium steel composite board comprises the following steps:
step 01) welding two titanium plates into a titanium clad plate by plasma welding, polishing the double-sided positions of the welding lines to be level with a titanium plate base metal by using a polishing machine, and polishing the surface to be bonded of the titanium clad plate by using a kiloimpeller to expose a fresh metal layer; adhering the buffer strip to the welding line by using 502 adhesive, wherein the longitudinal center line of the buffer strip is level with the longitudinal center line of the welding line;
step 02) assembling a wide titanium steel plate explosion composite structure on a sandy soil foundation, wherein a base plate, a titanium composite plate and explosives are sequentially arranged from bottom to top, a supporting sheet is arranged between the base plate and the titanium composite plate, and an explosion detonator is arranged at the central position of the upper end of the explosives;
step 03) detonating the detonator to detonate the explosive, namely completing the explosion welding of the wide titanium steel composite board, wherein the mechanical property of the wide titanium steel composite board after the explosion welding reaches or exceeds various standards specified by national standard NB/T47002.3, and the welding seam spliced by the multi-layer titanium board is detected by PT to not find crack generation; the titanium composite plate is pushed to the base plate after explosion welding to obtain a wide-breadth titanium steel composite plate, high-pressure impact load generated by explosive detonation is transmitted to the titanium welding line through the buffer strip, the instant impact load is mostly absorbed by the buffer strip, the titanium welding line does not directly bear high-temperature and high-pressure load generated by the detonation load, and the residual impact energy acted on the welding line plays a role in promoting the welding line to accelerate.
Claims (5)
1. The utility model provides a broad width titanium steel sheet explosive composite structure, this composite structure includes basic unit's board and titanium clad plate of laying on the ground, its characterized in that: the titanium clad plates are a plurality of titanium plates spliced by argon arc welding or plasma welding, and welding seams which are polished to be flush with the base metal are arranged between every two titanium plates through a polishing machine; the titanium cladding plate is positioned above the base plate, a supporting sheet is arranged between the titanium cladding plate and the base plate to separate titanium, explosive is arranged above the cladding plate, and an electric detonator is arranged above the explosive; a buffer strip is arranged above the welding line, the buffer strip separates the welding line from the explosive, and the width of the buffer strip is 2-3 times of the width of the welding line; the buffer strip is made of a titanium plate or a stainless steel plate, the width of the buffer strip covers a welding line and a heat affected zone of the titanium plate, the thickness of the buffer strip is 20-40 mm, the thickness of the buffer strip is 1-2 mm, the length of the buffer strip is equal to the length of the welding line, and the center line of the buffer strip is aligned with the center line of the welding line; the explosive uses powdery emulsion explosive, perlite is added to adjust the explosion speed of the explosive to 2000-2500 m/s, the explosive is distributed on the titanium clad plate and the welding seam buffer strip, and the thickness of the distributed explosive is 30-40 mm.
2. The broad width titanium steel plate explosive composite structure according to claim 1, wherein: the supporting sheet is made of V-shaped titanium strips, the thickness is 0.2-0.3 mm, the gap height is 6-10 mm, the arrangement interval is 200-300 mm, and the supporting sheet is far away from the welding seam and the heat affected zone of the titanium plate.
3. The broad width titanium steel plate explosive composite structure according to claim 1, wherein: the base plate is made of Q245R or Q345R and is arranged on the sandy soil foundation.
4. A method for preparing a broad titanium steel composite plate by using the broad titanium steel plate explosion composite structure as claimed in claim 1, which is characterized in that: the method comprises the following steps: step 01) welding the single titanium plate into a titanium composite plate by argon arc welding or plasma welding, polishing both sides of a welding line by using a polishing machine until the welding line is flush with a parent metal of the titanium plate, polishing a surface to be combined of the titanium composite plate by using a kiloimpeller, and exposing a fresh metal layer; adhering the buffer strip to a welding seam on one side contacting with the explosive by using an adhesive; step 02) assembling a wide titanium steel plate explosion composite structure on a sandy soil foundation, wherein a base plate, a titanium composite plate and explosives are sequentially arranged from bottom to top, a supporting sheet is arranged between the base plate and the titanium composite plate, and a detonation detonator is arranged at the upper end of the explosives; step 03) detonating the detonator to detonate the explosive, pushing the titanium cladding plate to the base plate to obtain the wide-breadth titanium steel composite plate, transmitting high-pressure impact load generated by detonation of the explosive to the titanium welding seam through the buffer strip, absorbing the instant impact load by the buffer strip, and enabling the titanium welding seam not to directly bear high-temperature and high-pressure load generated by detonation load, wherein residual impact energy acting on the welding seam plays a role in accelerating the welding seam.
5. The method for preparing the broad titanium steel composite plate by using the broad titanium steel plate explosion composite structure according to claim 4, which is characterized by comprising the following steps: and performing heat treatment on the welding seams formed by splicing the titanium plates and then performing explosion welding.
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| CN111299801B (en) * | 2020-04-03 | 2021-12-14 | 安徽弘雷金属复合材料科技有限公司 | Preparation method of titanium-stainless steel half-surface explosive welding material for LNG storage tank |
| CN114043066A (en) * | 2021-12-01 | 2022-02-15 | 安徽宝泰特种材料有限公司 | Preparation method of strong corrosion-resistant titanium-steel explosion composite material |
| CN114147338A (en) * | 2021-12-11 | 2022-03-08 | 宝鸡市钛程金属复合材料有限公司 | Explosive welding preparation method of titanium steel 2205 duplex stainless steel three-layer composite plate |
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