Some standard content:
ICS 47.020.50
National Standard of the People's Republic of ChinabZxz.net
GB/T548—1996
Technical requirements
Technical requirements for anchorsPublished on 1996-03-28
Implemented on 1996-11-01
Published by National Technical Bureau
National Standard of the People's Republic of China
Technical requirements
Technical requirements1 Subject content and applicable scope
This standard specifies the technical requirements, test methods, inspection rules and markings for anchors. This standard applies to oxygen storage, sequence army, Speck end, 2Y.6 sieve and end know. 2 Technical requirements for tension
2-1 The cast steel parts of the anchor shall be made of carefully matched steel or copper-smelting parts. Table 1 Chemical composition of the steel parts: The content of steel shall not be less than the actual content of steel. 0.04%
2.2 The tensile test results of the steel shall conform to the requirements of Table 2, Table 2 Skin strength.
Tensile strength 0
.0. 04
Elongation
f.= 5. 65 A
GB/T5481996
Generation GB548--83
Current length
Excess charge capacity does not exceed
Section end rate
2.3Lithium steel character connection adopts dyeing solution, chemical composition according to Table 3,
Chemical composition.%
Average connection mode
Non-olefin
0.32~.1.79
39-1. 50
select, 1) the carbon content of the sample taken from the work shall not exceed .25%, 21 but the Technical Supervision Bureau approved S on March 28, 1996, the remaining fee is 300.15
0.30120.4
1996-1T-D1 implementation
GA/T548-.1996
2. The test results of the plated steel work shall comply with the current provisions of the previous 4. Table 4
Detailed service strength measurement 5,
2.5 positive anchor, S! Standard leakage, ZY also the nominal weight class is expressed by the total weight of the wrong Yao, the actual weight of the real wrong head (including the small shaft and wholesale) shall not be less than the actual total weight of the cat. 2.6 The straight line under the lithium should not exceed 3tnm in 1m length. For the curved parts, correction can be made. After straightening, light overheat treatment should be performed.
2.7 The steel parts with concave or flat furnace defects should be heat treated in the following ways: full tempering once to the upper critical point, and then slowly cooled after solidification.
b Normalizing:
E Tempering can be tempered, and the tempering temperature should not be higher than 550 (2. The parts with light acne and pores should not have cracks, pores, fat, cold sink, cancer and other defects that can affect the shaping of the surface strength. The surface strength should not be affected. However, it must meet the requirements of the current specifications of the aviation grade. 29 For the pin joint: a detailed welding procedure should be formulated before production. , and obtain the approval of the stock level, 3 test method
3.1 Transfer sample and test
3.1. The same batch of molten steel, the same specification, one hot treatment, and the total unit quantity does not exceed 31000 tons, take 10000 tons of tensile test specimens for walking tensile test, the test position can be accompanied by the general body of the good parts or connected to the body of the cross-parts, but its length shall not be less than 36:nm
31-2 Hot test scale d=14am\7mn,
3.1.3 The tensile test results must meet the requirements of Table 2, 3.1.4 If the total weight of several batches can exceed 31 or special When the quantity of a single piece exceeds 101, a tensile test specimen shall be added. 32 Forging Parts Test Specimens and Tests
3.2.1 Forgings can be certified by the material. 3-2.2 The surface size of the light-steel test block shall be the same as that of the part represented by the piece. The test block shall be subjected to the opposite heat treatment as the parent piece.
3-2.3 The same piece shall be processed with a small short piece of similar size. One of the forging test blocks can be replaced for batch testing.
3.2.4 Tensile test blocks can be selected with the size f..1: nmf=7Cmm3.2.5 The time for the tensile test is relative to the general dimension of the part, and the following provisions are made: the longitudinal direction of the test line is in the direction of extension of the non-flexible fiber: the axis of the specimen is perpendicular to the direction of extension of the industrial fiber or the scientific dimension. 3.2.6 The tensile test results must meet the requirements of Table 4. 3.3 Tensile test 3-3.1 Nominal vertical tensile test (including the live model lamp) W75ke heat stress reverse tensile test, the tensile application point, the disease is at the wrong shackle, and the other is at the broken pin tip L3, as shown in Figure 1, the test should be correct and the end of the rod and the end of each real end, each part mark, for the test of the appropriate separation.
e/r548-1996
3.3.? Box read error, the cat should be 2-5 cats to start the error, can be pulled twice to test. Then put the pins in another place and perform the same test:
the effectiveness of the pins is tested according to the regulations.
Tension is the basis of the test load
Monitor for the test load
T 1:5c:
115℃
2 26:3
Stop force test year
LBT548—19S6
Continued Table 5
j0 5ckl
1: 500
12 0o0
Tension test acid load
: 110
Method: When the test time is required, the tension is the method for the cavity position and the compensation decision is made by the internal tow through the reconstruction of the agricultural shop. The following regulations are mainly adopted:
Do the shop, the Baker wrong, the 2Y-G wrong, the total weight of the pin:! a.
For full rate description, for the wrong weight of the sample rod,
17 0V2
21:000
28 005
25 000
35 0C3
38 00-
Tensile test is negative and
180
.3.4 When conducting position test on standard Becker, Baker and 7Y-s cats, the pressing force should be applied to 10% of the test load first. Stay for 5 minutes, measure the distance between the two sides, and if the pulling force reaches the test load value, wait for: min, reduce the pulling force to the test load value, and then measure the controllable distance
3.5 Duer, Spey, ZY-5 after the tensile test. The residual deformation (the distance between the two marks increases with the height) shall not exceed 300 mH. Check the flexibility of the food storage melon to measure the angular velocity. If the rotation is not flexible or cannot be turned to a large degree, the defects should be eliminated and the working tensile test should be carried out. If it is still unqualified, it cannot be accepted. After the tensile test, the deformation of the pin exceeds 20mm and cannot be accepted. 3.6 Each end shall be subjected to a tensile test in turn. Before the test, the distance between the two marks shall be kept at the base. During the test, the tensile force shall be gradually increased until the test mark is maintained for 5 seconds. After the mark is removed, the distance between the two marks shall be measured again. If there is any deformation, the pin shall be regarded as a qualified product. 4 Inspection rules
4.1 The ends shall be inspected by the internal technical inspection department and the ship classification department, and a certificate of qualification shall be issued. 2 Each end shall be inspected for appearance weight and dimensions before the test. 4 3 The actual weight of the pin is allowed to deviate from the nominal weight by ± 3%, but the total actual weight of each end shall not be less than the total nominal weight.
4.4 When the allowable deviation of the weight of the anchor is met, the allowable deviation of the size of each part is ±4%, but the maximum value shall not exceed 2cm1m4.5 Vertical anchor, Spike anchor, ZY-6 anchor claw, the allowable deviation of the corner is ±1\5 mark
5.1 The anchor that has been inspected shall be marked or punched with the following marks: a.
The nominal weight and standard mark of the anchor:
The stamp of the same manufacturer;
The stamp approved by the ship inspection department and the inspection certificate number! d
The year and month of the test.
5.2 The nominal weight of the anchor shall be marked at the key mark of the Spike anchor, Spike anchor, 2Y-6 anchor. 5.3 The nominal weight of the auxiliary and the weight of the crossbar itself shall be marked at the connecting rod mark of the military anchor, 5.4 Anchor shackles shall be marked with model, standard number and inspection pass rate. Additional remarks: This standard is proposed by China Rongshi Shangyi Corporation. This standard is owned by Hongnan Shipyard and is drafted by the Seventh Institute of the Seventh Research Institute of China Jieyi Industry Corporation. The main drafter of this standard is Chen Ding.
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