CB/T 3953-2002 Technical requirements for welding of aluminum-titanium-steel transition joints
Some standard content:
[CS 47, 020, t15
Record number: 11148-2003
People's Republic of China Shipbuilding Industry Standard
CB/T3953-2002
Specificatinn for welding of aluninum-titaniurm-steel cladding transition joim2002—11—20 Issued
National Defense Science, Technology and Industry Commission Issued
200302—01 Implementation
This standard is proposed by the China Shipbuilding Industry Corporation. Foreword
This standard is the responsibility of the China Shipbuilding Industry Corporation. The originating units of this standard: Jie 17th Institute E2 Research Institute, 4th Ship Industry Institute, 49th Factory participated. Drafting person of this standard: Wu Hu, Yao Songgen, Time: CB/T8953-2002
1 Scope
Technical conditions for welding of aluminum-titanium-steel transition joints CB/T 8953-2002
This standard defines the welding of a titanium-steel transition joint (hereinafter referred to as transition joint), materials, welding process, quality inspection, welding, etc. This standard is used for the transition joint of aluminum structure and steel structure as the composite layer, and is used as the transition joint of aluminum structure and steel structure as the composite layer. 2 Normative reference documents
The clauses in the following documents become the clauses of this standard through the use of the major standards. For all undated referenced documents, all revised editions (excluding errors notified) are not applicable to this document. However, please refer to the section of this standard to check whether the latest version of this document is used. For all undated referenced documents, the latest or appropriate standards are as follows: G712 Aviation structural steel B/T3190 Variable series aluminum and alloy chemical composition Aluminum and aluminum alloy rolled plates SP/T3880 G3/T 4842 Pure carbon potassium welding rod GR/TS117 Low alloy steel welding rod G3/T5118 GB/T 6052 Industrial carbon monoxide GB/T 811O
Performance specification of acid steel, gold-containing welding wire and alloy for gas-proof electric drive welding
GT1138A
C1:34:5 Specification for aluminum-steel filter joints
B4730 Damage detection of mechanical penetration
a Materials
3.1 The aluminum, steel and selected materials for transition joints and their connections shall have quality certificates and shall be re-tested according to relevant standards when necessary:
3.2 The material composition, specifications and quality requirements of transition joints shall comply with B1343 or the agreement between the supply and demand parties. 3.3 The aluminum and steel materials shall comply with uB/3190, GD/ 2EE0, GB712 or other relevant standards. 3.4 The welding rod and the welding end shall comply with the provisions of GB/5137, B511S, /T811, T11 or other relevant standards. 3.5 The welding rod and the welding end shall comply with GB/6/442, GB/6C52. 3.6 When welding with non-melting arc, the welding screen shall correct the calcium salient electrode: 3. The adhesive used for sealing the welding head shall meet the requirements of strength, separation and separation of the joint. 4 Welders 4.1 The welders who are engaged in the construction of transition joints shall have the alloy steel welding qualification certificate recognized by China Shipbuilding Industry Corporation or relevant institutions. 4.2 The welders shall be in accordance with the welding material, welding method, welding position and short joint type and the welding qualification certificate.
4.3 During product welding, welders shall comply with the welding process specifications in-
CB/T 39532002
5 Preparation for welding
5.1 Cutting and processing
Cutting and processing of the liquid joint shall adopt the method of cutting or other effective methods that do not affect the bonding performance of the joint. 5.2 Joint types
5.2.1 The welding joint types of the filter joint are divided into the lossy joint between the liquid joint and the welding joint between the ship and the structural parts.
5.2.2 The welding joints between the transition joints are divided into butt joints and angle joints. There are two types of butt joints: free joints that can be turned over when the butt joint is connected, and the other is a restrained joint that cannot be turned over. , joint type and size see 1
5.2.3 The welding joint between the filter head and the structural parts should be angle according to the technical secretion, and its type and size are shown in Table 2: Weld leg size, specification and implementation:
5.3 Pre-welding treatment
5.3.1 The groove and groove edge of the parts within 30mm should be free of contaminants such as soft potassium, water, oil, etc. The oxidation of the lead surface should be removed by the primary method (additional method, stainless steel brush) or other effective methods. 5.32 The wire surface treated by chemical treatment does not need to be cleaned: The welding wire should be cleaned with acetone liquid to remove the dirt, and then washed with chemical detergent, rinsed and dried: If there is an oxide film on the surface, it can be removed by mechanical methods such as scraper! 5.33 The weldment and bottom wire after cleaning should be kept clean and fresh, and always use pressure 5.4 Assembly and positioning welding
5.4.1 Let the splashing be forced to assemble: The assembly can be done by necessary work, pay attention to protecting the aluminum surface, and the assembly size should be accurate. When assembling between transition joints, take the titanium layer as the reference, and the misalignment should be less than 5. 5.4.2 The welded material should be consistent with the lower production standard, and the fixed welding point between the inner end of the liquid joint and the main structure can be set on one side or both sides of the structure. The minimum length of the positioning welding chain is generally 10m~20m, and the spacing is 5 blood, which can also be determined according to the working conditions. If cracks or defects are found in the positioning weld, they should be removed: the new position weld should be used, 6 welding
6.1 General requirements
6.1.1 When welding between transition joints, the principle of welding lead and pin, and welding with inlay separately, and the principle of not welding the silver layer. 6.1.2 When welding, the welding process and process efficiency should be carried out with low energy. 6.1.3 The temperature of the welding side should not exceed 350℃. 6.1.4 When welding, the temperature of the transition should not exceed 60℃. 6.1.5 When welding, the pin side should be welded first, and then the steel side. If the welding procedure cannot be carried out, the pin should also be welded first: but the aluminum side should be effectively kept clean when the joint area is maintained. 8.2 Welding process assessment
2:1 It is necessary to conduct a timely inspection of the production process and conduct the punching and pulling process assessment. 6.2.2 The welding process assessment shall be based on the provisions of the standard, including the product structure characteristics and technical requirements, and the assessment method shall be completed and approved by the relevant quality supervision department.
6.2.3 Based on the approved welding process, the joint points and support requirements of the product, the welding process regulations shall be formulated. 6.3 Welding process test
6.3.1 When using transition joints, welding process tests shall be carried out. 63.2 The dimensions of the welding test specimen are shown in Figures 1 and 3. The upper and lower aluminum welding joints of the steel welding joint should be the same as those of the battery welding joints. The welding seams of the steel welding joints should be the same as those of the battery welding joints. The steps of the welding test are as follows: Select the standard, and carry out the welding process on the upper and lower aluminum joints respectively: During the welding process, measure the temperature of the aluminum joints: Take two specimens at the test position, and test them with a size of 2. The requirements of these tests are as follows: bzxz.net
The test stress should not be lower than the smaller tensile force specified in the table of this structural part and the calculated minimum tensile strength b)
The aluminum-titanium interface temperature of the joint should not exceed 350℃. Unit: meter
Test plate size and assembly
Test length
Figure 2 Sample size
6.4 Welding process parameters
The product welding process is effective. The construction unit shall be based on the welding process assessment or transmission. "Technical test addition: 6.5 Welding methods and equipment
6.5.1 Steel wire structure welding should be carried out by manual welding with olefinic gas protection. The corresponding material connection equipment unit is meter
6.5.2 The front structure connection should adopt methane gas welding (MTG) or non-penetrating gas welding (T[G!), and the corresponding source connection equipment should be used. 6.5.3 It is allowed to use the short-circuit method that can ensure the connection quality! 7
CE/T3953—2002
8.9 Welding materials
The selection of welding materials should be matched with the machine for ship components such as shipbuilding and other structural parts. When the wave head or layer is 3/21, the selection of aluminum alloy welding materials can refer to Table 3.
Table 3 Aluminum alloy welding for materials
Use armored plate
flat or grained materials
Welding procedure
Preparation before returning to the provisions of Chapter 5,
8.7.2 When welding between single joints, the requirements shall be followed such as, 5A0
filter joints, the carbon layer, the pure layer and the intermittent layer: the arc starting plate and the arc plate shall be used, and the deformation reduction method shall be adopted:
The weld after welding, the production machine method is too much and the two Xie Da are adjusted: SA
When not required, the joint is asked to form a small hole in the original place, and then inject high-efficiency bonding, or adopt other effective methods to seal. 6.3 The welding requirements of the joint and the parts are as follows: a) When welding, flat welding should be used as much as possible: single-sided long welding, graded jump welding, step-back short welding or symmetrical welding, and the continuous seam should be controlled! , and the drop should not exceed 500mm
6.7.4 When the external olefin (I9) is touched, the welding should be stopped and the welding part should be removed. 6.7.5 After the evaluation, the surface of the parts should be cleaned of dirt such as rate, pain and flying objects. The welding chain should be cleaned up as soon as possible. The quality inspection personnel should be trained in technology, can correctly grasp the welding quality rating standards, and obtain the relevant department's approval! 7.2 Process Inspection
After each process of welding is completed, it should be found that the inspection is qualified. 7.3 Appearance Inspection
7.3.1 The appearance of the weld and the selected joint can be inspected with the naked eye or a 5~10 times magnifying glass. The standard inspection is 100%.
.3.2 The size of the weld should meet the requirements of the design drawing: 7.3.3 The finished product should be uniform and consistent with the mother village. There should be no cracks, pores, slag, resistance and other defects on the surface.
3.4 The composite interface of the joint should not have defects such as other defects: 7.4 Penetration test
When the design drawings or technical documents have requirements, the composite interface of the filter joint core should be tested. The inspection method shall be in accordance with the provisions of JI4730:
7.5 Tightness test
The tightness test of the welded joint shall be in accordance with the provisions of the design drawings or technical documents. 8
Welding defect repair
CB/T 3953 —2002
日.1 When a weld is found to have irregularities, it shall be repaired after mechanical repair. The same part shall not be repaired more than twice:
日.2 If a weld is still unqualified after two repairs, it shall be approved by the chief technical officer. The number of repairs and the repair status shall be recorded in the quality file
8.3 When the weld is out of specification, the weld shall be re-welded. The minimum length of the weld is 1(10m:
9. 1. The transition connection should be carried out indoors. If it is carried out outdoors, it should be equipped with wind and rain protection facilities. 9.2 The connection environment should be clean and high temperature. When there are people, dry measures should be taken. 9.3 When the ambient temperature is lower than the center, preheating should be carried out indoors at the beginning of welding: the preheating temperature should not be lower than ET10. Safety protection
10.1 The connection room should be properly equipped, and the connection should be completed in time. The electric wire should be better than the end. 10.2 The connection workshop should have good ventilation equipment and a small air conditioner. 10.3 The problem personnel should report the problem as soon as possible.
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