SJ 3267-1989 Nickel-plated iron strip for electric vacuum devices SJ3267-1989 Standard download decompression password: www.bzxz.net

Ministry of Machinery and Electronics Industry of the People's Republic of China Standard SJ3267-89
Nickel-plated iron strip for electric vacuum devices
Published on March 20, 1989
Implemented on March 25, 1989
Published by Ministry of Machinery and Electronics Industry of the People's Republic of China 1
Ministry of Machinery and Electronics Industry of the People's Republic of China Standard Nickel-plated iron strip for electric vacuum devices
This standard applies to nickel-plated iron strip for manufacturing electric vacuum devices. The brand,
grade and use shall comply with the provisions of Table 1.
Ni-Fe-Ni
Thickness of single-sided nickel layer, mm
Note: The grade should be specified in the contract when ordering, otherwise the supply shall be grade II. 2 Technical requirements
2.1 Chemical composition
SJ3267-89
Manufacturing internal parts of electron tubes
Manufacturing internal or external parts of electron tubes
2.1.1 The chemical composition of iron shall comply with the provisions of grade DT3 in YB200-75 "Pure iron for electrical use". 2.1.2 The chemical composition of nickel shall comply with the provisions of grade NY or NY in YB144-71 "Chemical composition of nickel and nickel alloys".
2.2 The strip shall be free of low-melting-point metal evaporation. 2.3 Surface quality
The surface of the strip shall be clean and smooth, without cracks, bubbles, peeling, delamination and severe scratches. Local slight roller marks and washable marks are allowed.
2.4 The dimensions and their deviations shall comply with the provisions of Table 2. Table 2
Original thickness mm
0.10~0.15
0.16~0.39
0.40~0.60
0.61~0.75
0.76~0.99
Thickness deviation mm
Width mm
60~100
63~100
60~100| |tt||60~100
60~100
60~100
Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on 1989-03-20Width deviation mm
Implemented on 1989-03-25
2.5 Straightness requirements
SJ3267-89
2.5.1 The camber of the belt shall not exceed 2mm per meter. 2.5.2 The flatness shall not exceed 5mm per meter. 2.6 The bond between the iron layer and the nickel layer shall be firm without blistering or delamination. 2.7 For materials without trimming, slight cracks and burrs within 3mm of the edge are allowed. 2.8 The thickness of the nickel layer shall comply with the requirements of Table 3.
Single-sided nickel layer
8 Test method
3.1 According to the requirements of 2.1.1, the chemical composition of iron shall be carried out in accordance with GB223.1~223.7-81, GB223.8~
223.24-82 "Chemical analysis method for steel and alloys". 3.2 According to the requirements of 2.1.2, the chemical composition of nickel shall be carried out in accordance with SJ154287 "Chemical analysis method for nickel and nickel alloys".
3.3 According to the requirements of Article 2.2, the following low-melting-point metal evaporation test is carried out: roll the 25×40mm sample into a cylinder, clean it with gasoline, place it in a hydrogen furnace at 850~900℃, keep it warm for 10 minutes, take it out after cooling, and then put it into the glass bulb to exhaust and seal it. The vacuum degree is 6.666×10-\Pa (5×10\mmHg), and bake it at 900℃ for 5 minutes with high frequency heating, and check whether there is metal evaporation on the inner wall of the glass bulb. 3.4 According to the requirements of Article 2.3, the surface quality is checked with the naked eye. 3.5 According to the requirements of Article 2.4, the thickness is detected with a first-level micrometer, the width is detected with a steel ruler, and the length is detected with a tape measure. wwW.bzxz.Net
3.6 Straightness test
According to the requirements of 2.5.1, take any 1m long strip, stand it on the platform, and measure the distance between its edge and the platform. 3.6.1
According to the requirements of 2.5.2, take any 1m long strip, place it flat on the platform, and measure the distance between its edge and the platform. 3.7 Test of the bonding firmness between the iron layer and the nickel layer According to the requirements of 2.6, take any 60~100×200~250mm sample and put it in a hydrogen furnace to heat to 850~900℃, keep it warm for 15min, and take it out for testing after cooling.
3.8 According to the requirements of 2.7, use the naked eye and steel ruler to detect edge cracks and burrs. 3.9 According to the requirements of 2.8, carry out according to the provisions of GB11250.2-89 "Composite Metal Coating Thickness Determination Method-X Fluorescence Method". In case of objection, metallographic method shall be used as arbitration method. 4 Inspection rules
4.1 The quality inspection department of the supplier shall inspect the strip according to the provisions of this standard and fill in the quality certificate. 2-
SJ3267-89
4.2 The buyer shall inspect the product according to this standard within three months from the date of receipt. If the inspection result does not meet this standard and is still unqualified after identification by both parties, it shall be unqualified. 4.3 Each submitted batch is allowed to be composed of different production batches, and the buyer shall accept the submitted batches. 4.4 According to the requirements of 3.1 and 3.2, take one sample from each submitted batch and determine the chemical composition. 4.5 According to the requirements of 3.3, take five samples from each submitted batch to test the evaporated low-melting-point metal. 4.6 According to the requirements of 3.4, 3.5 and 3.8, 100% of the surface quality and size shall be inspected. 4.7 According to the requirements of 3.6, 3.7 and 3.9, three samples are randomly selected from each batch for straightness inspection. 4.8 If one of the tests fails, double sampling is conducted from the batch, and the unqualified items are retested. If there is still one unqualified test result, the batch is unqualified. 5 Marking, packaging, transportation and storage
5.1 The packaging of the coil should be sufficient to prevent the product from being damaged and contaminated during transportation and storage, and the outer packaging should be firm and unbreakable.
5.2 The weight of the coil should not exceed 15kg, and the weight of each box should not exceed 30kg. The words "moisture-proof" and "handle with care" should be marked on the box.
5.3 The packaging box should indicate
a. Material name,
b. Specifications and weight,
c. Production batch number,
d. Inspection date,
e. Seal of the inspection department and inspectors,
f. Manufacturer's name.
5.4 Do not bump or throw the product during transportation. 5.5 The product should be stored in a ventilated, dry environment without acid or alkali atmosphere. The storage period should not exceed half a year. Additional remarks:
This standard was drafted by the State-owned No. 745 Factory.
This standard was first issued on October 13, 1973. 3
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