JB/T 6066-1992 Standard test block for magnetic particle inspection JB/T6066-1992 standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
Standard test blocks for magnetic particle testing
Subject content and scope of application
JB/T 6066--92
This standard specifies magnetic particle testing Technical requirements, inspection methods, inspection procedures, marking, packaging and use of two types of B and E standard test blocks.
This standard is applicable to the product quality assessment of two types of ring standard test blocks, B and E, for magnetic particle flaw detection. 2 Reference standards
GB230
Metal Grignard hardness test method
Technical conditions for high-quality carbon structural steel
GB 699
GB1031
Surface roughness parameters and their numerical values
GB1299
Technical conditions for alloy tool steel
Determination method of average grain size of metal
GB63943
3 Technical requirements| |tt||3.1 Shape and size
The shape and size of type B test block are shown in Figure 1, and the shape and size of type E test block are shown in Figure 2. ±0. 05
0.05B
hole number
2
F12t,
3
5.347.11
1.783.56
4
5
11 — 20°±0. 5
12 — Rainbow 7.5 through hole
22±0.5||tt ||3.2/
G
?
10
8.8910.6712.4514.2216.0017.7819.5621.34 Figure 1
Type B standard test block|| tt||Ministry of Mechanical and Electronic Industry of the People's Republic of China 7992-05-05 approved the implementation of 1993-07-01
393
2.5±0.3
Materials for 3.2B type test block|| tt||150±0.4
25±0.5
A
B
I
1.
JB/T 6066-- 92
net±0. 05℃
0. 05B
a
1.5
2006 class
@0. 05A|| tt||2
2.0
Figure 2E standard test block
3
2.5
1938
±0.05||tt| |50±0. 025
3*1 hole
[ 0. 054
@
The material of type B test block should comply with the requirements of GB1299 and be annealed The hardness of the processed 9CrWMn steel forgings is 90~95HRB, and the grain size is not less than level 4.
Material of 3.3E type test blockwww.bzxz.net
3.3.1 The outer ring material should comply with the annealed 10 steel forgings specified in GB699, and the grain size should not be less than level 4. 3.3.2 The inner ring material is a non-metallic material with certain heat resistance, oil resistance, deformation resistance and easy cutting properties. Such as: organic glass, hard polyoxyethylene, etc.
3.3.3 The mandrel material is aluminum alloy or aluminum alloy.
4 Inspection rules and methods
4.1 Inspection of raw materials
4.1.1 The inspection items of raw materials are limited to the outer rings of type B test blocks and type E test blocks. 4.1.2 Chemical analysis of raw materials
4.1.2.1 At least one sample should be taken out of the raw materials with the same furnace number (or batch number) for chemical analysis. The analysis results of raw materials used for type B test blocks should comply with the regulations of GB1299, and the analysis results of the raw materials used for the outer ring of type E test blocks should comply with the regulations of GB699.
4.1.2.2 If the analysis results of any of the above samples do not meet the specified requirements, three or more supplementary samples are allowed to be taken out for chemical analysis. As long as the analysis result of one sample among the supplementary samples does not meet the requirements, If the specified requirements are met, the raw materials of this heat number (or batch number) are not allowed to be used to manufacture test blocks.
4.7.3 Determination of grain size and hardness of raw materials 4.1.3.1 Determination of grain size and hardness are carried out after the raw materials have been forged and annealed. 4.1.3.2 The determination of hardness is only applicable to the raw materials of type B test blocks. 4.1.3.3 At least one sample from batches of annealed raw materials should be taken to measure its grain size and hardness. Grain size evaluation is carried out in accordance with the provisions of GB6394. The hardness is measured in accordance with the regulations of GB230. 394
JB/T 6066-92
4.1.3.4 If the result of the second measurement is unqualified, resampling is allowed for a second measurement, but at least three samples should be taken out, and as long as there is one sample If the measurement result is unqualified, the relevant process must be re-processed to make it qualified. 4.1.3.5 In order to make the grain size and hardness meet the technical requirements, the process is only allowed to be repeated once at most. 4.2 Factory inspection of type B test block
4.2.1 See Table 1 for the inspection items, inspection methods and inspection requirements. Table
Inspection items
Test inner and outer diameters
Test block friction thickness
1.78 through hole diameter
$1.78 through hole position||tt| |1.78 through hole verticality
Surface roughness
Inspection method
Use vernier calipers or special snap gauges and plug gauges for inspection of minute ruler or dial indicator||tt| |Use standard plug gauge to inspect
Use a projector or insert a plug gauge with a length of not less than 44mm into the through hole, use the outer circle of the plug gauge as a benchmark for inspection, and sow a plug gauge with a length of not less than 44mm into the through hole. hole, use the outer circle of the plug gauge as a benchmark for inspection
Use a standard roughness sample that meets the requirements of GB1031 for comparative inspection
Note: The use of other effective methods for inspection is not excluded|| tt||Zhang
Should comply with the provisions of Figure 1
4.2.2 Test blocks that fail the inspection are not allowed to enter the finished product warehouse, nor are they allowed to flow into the commodity market without photographic flaw detection through any channels. 4.3 Factory inspection of type E test block
4.3.1 Inspection of outer ring
4.3.1.1 Inspection items, inspection methods and inspection requirements of outer ring Inspect unqualified outer ring according to Table 24.3.1.2 They are not allowed to enter the finished product warehouse, nor are they allowed to enter the non-destructive testing commodity market through any channels. 4.3.2 Inspection of the inner ring and conductive core rod
The inspection items of the inner ring are the inner diameter, outer diameter and length, and the inspection items of the conductive core rod are the diameter and length. 4.3.2.1
4.3.2.2 The inner diameter of the inner ring shall be inspected with a special plug gauge, the outer diameter shall be inspected with a micrometer or a special caliper, and the length shall be inspected with an ordinary ruler or a special caliper.
4.3.2.3 The diameter of the conductive core rod is inspected with a ruler or a special caliper, and the length is inspected with an ordinary ruler or a special caliper. 4.3.2.4 Inspection according to Articles 4.3.2.2 and 4.3.2.3 The results should comply with the requirements of Figure 2. The inner ring and core rod that fail the inspection are allowed to be recycled in accordance with the provisions of Article 4.4.2. 4.4 Inspection after assembly of type B test block
4.4.1 Main inspection items
a.
Whether the inner and outer rings are located in the middle of the conductive core rod. Whether the tight fit between the outer ring and the inner ring and between the inner ring and the mandrel meets the requirements. b.
4.4.2 If only one fit between the outer ring and the inner ring or between the inner ring and the mandrel is not tight, and the gap is not greater than 0.05nm, it is allowed to use padded purple steel foil or use bonding agent method to achieve a tight fit. 4.5 Type inspection
4.5.1 In the following situations, type inspection should be carried out; a. | |tt | , the initial stage of each production cycle (such as type inspection every six months); when the product resumes production after a long-term suspension; 395
JB/T 6066-92
e. When the national quality supervision agency proposes type inspection requirements. 4.5.2 The type inspection items of type B test block include all the items listed in Table 1 and the raw material inspection items specified in Article 4.1. 4.5.3 The type inspection items of type E test block include all the items listed in Table 2 and the raw material inspection items specified in Article 4.1. 4.5.4 The samples for type inspection are product test blocks that have passed the factory inspection. Choose any three test blocks, and the inspection items specified in Article 4.5.2 or 4.5.3 must be completed on each test block.
4.5.5. The inspection items of the original raw materials (such as chemical composition, grain size, hardness) are changed to the test block to be inspected during type inspection. 4.5.6 When the type inspection fails, necessary adjustments should be made to the production of the test block. 4.6 The user who purchased the test block has the right to re-inspect the technical requirements of the test block. If sufficient evidence can be produced after the re-inspection to prove that the test block does not meet the technical requirements, within 3 months after purchasing the test block, , or within the validity period of the contract, the manufacturing unit shall accept the user's request for replacement or return.
Table 2
Test items
Test block inner diameter
Test block outer diameter
Outer circle center of charge
Test block length| |tt||1 Through hole diameter
Through breast angle
Through hole position
Perpendicularity of rainbow hole
Surface roughness
Inspection Method
Use special plug gauge to test
Use ruler or special snap gauge to test
Use dial indicator to test on standard platform
Use vernier caliper or special Caliper inspection
Inspection with plug gauge
Inspection with angle meter
Use a projector or insert a plug gauge with a length of not less than 25 mm into the through hole. Use the outer circumference of the plug gauge as a benchmark for inspection. Pick a plug gauge with a length of not less than 25 mm into the through hole, and use the outer circle of the plug gauge as a benchmark for inspection
Use a roughness sample block that meets the requirements of GB1031 for comparative inspection Note: The use of other effective methods for inspection is not excluded. 5 Marking and packaging
5.1 Marking
5.1.1 The test block shall have the following permanent marks: a. The name or trademark of the manufacturing unit;
b. The factory number of the test block.
Inspection requirements
Should comply with the provisions of Figure 2
5.1.2 The permanent mark on the type B test block is located on the end plane of the test block and can be concentrated on one end plane. It can also be dispersed on the two end planes, but it must not hinder the 178 through holes. 5.1.3 The permanent mark on the E-type test block is located on the cylindrical surface or end plane of the inner ring that is not covered by the outer ring. It can be concentrated at one end or dispersed at both ends.
5.1.4 The name of the manufacturing unit can be the full name, abbreviation or abbreviation. 5.2 Packaging
5.2.1 Boxes or other packaging boxes can be used for packaging. 5.2.2 The entire surface of type B test blocks should be coated with anti-rust oil before packaging. Type E test blocks should at least have the outer surface coated with anti-rust oil before packaging. 3. The product certificate and product instructions should be included in the packaging basin. The product name, date of manufacture and inspection personnel code 5.2.3
should be marked on the certificate.
396
Usage Precautions
6
JB/T 6066--92
6.1 Before use, the test block should be used without kerosene and other solvents. Wipe off the anti-rust oil with a cotton ball. 6.2B type test block is suitable for flaw detection with magnetizing current of direct current and rectifier. It should be demagnetized before use. When using, a steel or aluminum alloy rod with a diameter of 29mm ± 1mm ??and a length of not less than 400mm should be inserted into the test block. The inner hole acts as a conductive core rod. The 6.3E type test block is suitable for flaw detection where the magnetizing current is alternating current and is allowed to be used without demagnetization. 6.4 After use, the test block should be coated with anti-rust oil according to the provisions of Article 5.2.2 and placed in a packaging box for storage. Type B test blocks should also be demagnetized before being coated with anti-rust oil.
When rust spots appear on the surface of the test block, they should be removed in time with anti-rust agent or fine sandpaper. 6.5
Additional notes:
This standard is proposed by the National Technical Committee for Nondestructive Testing Standardization. This standard is under the jurisdiction of the Shanghai Materials Research Institute of the Ministry of Mechanical and Electronic Industry. This standard is drafted by the 621 Institute of the Ministry of Aeronautics and Astronautics and the Shanghai Materials Research Institute of the Ministry of Mechanical and Electronic Industry. The main drafters of this standard are Fu Yang and Xu Lixian. 397
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