This standard applies to nickel-based alloy working layer powder for oxy-acetylene flame spraying. GB/T 8548-1987 Nickel-based spray alloy powder GB/T8548-1987 Standard download decompression password: www.bzxz.net

UDC669.245-492.2:621.793.7
National Standard of the People's Republic of China
GB854887
Nickel-based alloy powder for spraying
Metallic powder material
Nickel-based alloy powder for sprayingPublished on 1987-12-30
Published by the National Bureau of Standards
Implementation on 1988-12-01
National Standard of the People's Republic of China
Nickel-based alloy powder for spraying
Metallic powder material
Nickel-based alloy powder for sprayingThis standard applies to nickel-based alloy working layer powder for oxy-acetylene flame spraying. 1Terms and Terms
UDC669.245-492.2
:621.793.7
GB8548—87
1.1Nickel-based spray alloy powder refers to an alloy powder based on nickel and containing appropriate amounts of carbon, chromium, iron, silicon, boron, aluminum and other elements, which forms a coating without remelting after spraying.
1.2Oxygen-acetylene flame powder spraying refers to a surface repair and strengthening technology that uses oxygen-acetylene flame as a heat source to spray the spray powder in a molten, semi-molten or softened state after passing through the flame zone on the surface of the workpiece to form a coating mainly based on mechanical bonding. 2Varieties
Nickel-based spray alloy powder is divided into three grades according to chemical composition and performance: FPTN-150, FPTN-200 and FPTN-250, see Table 1. Table 1
Grade and category
FPTN-150A
FPTN-150B
FPTN-200A
FPTN-200B
FPTN-250A
FPTN-250B
Melt temperature, ℃
Hardness of spray coating, HB
150~200
200~250
250~350
2.2 Each grade is divided into two categories, A and B, according to whether it does not contain aluminum or contains aluminum. 2.3Example of brand and category representation method
Approved by China National Nonferrous Metals Industry Corporation on December 21, 1987A or B
Characteristics of spray coating
Good processing performance, good toughness, good corrosion resistanceGood processing performance, moderate hardness, corrosion resistance and wear resistanceSuitable for turning with carbide tools. Wear resistance and corrosion resistance categories
Hardness of spray coating (HB)
Separating short line
Dart-based alloy
Spray powder
Implementation on December 1, 1988
3 Technical requirements
The chemical composition of the powder shall comply with the provisions of Table 2. Brand and category
FPTN-150A
FPTN-150BwwW.bzxz.Net
FPTN-200A
FPTN-200B
FPTN-250A
FPTN-250B
0.3~0.51.0~2.0
3.2 The particle size range of the powder shall comply with the following provisions: Particle size range: 104~38μm
GB8548--87
Composition, %
Of which the powder with a particle size less than 38um shall not exceed 5%; the powder with a particle size of 104~124um shall not exceed 3%: powder particles larger than 124um are not allowed to exist.
3.3 The hardness of the powder spray coating shall comply with the provisions of Table 1. 3.4 Powder fluidity:
The flow time of Class A powder is not more than 25s/50g; the flow time of Class B powder is not more than 50s/50g. 3.5 The melting temperature shall comply with the provisions of Table 1 and be inspected regularly. 3.6 There shall be no foreign inclusions visible to the naked eye in the powder. 4 Test methods
4.1 The chemical composition analysis of the powder shall be carried out in accordance with the following provisions: Carbon shall be carried out in accordance with GB223.1-81 "Determination of Carbon Content in Steel and Alloys". Oxygen, chromium, silicon, boron, iron and aluminum shall be carried out in accordance with GB8638-88 "Chemical Analysis Method for Nickel-Based Alloy Powder". 4.2 The hardness test method of powder spray coating shall be carried out in accordance with GB231-84 "Metal Brinell Hardness Test Method". Sample preparation shall comply with the provisions of Table 3.
Thickness of sprayed layer, mm
Spraying conditions
Oxygen-acetylene fast flame spraying, natural cooling
A3 or 45# carbon
Sample size, mm
30×20
Before processing
4.3 The test method for powder particle size range shall be carried out in accordance with GB1480-84 "Determination of particle size composition of metal powders
After processing
Dry screening method".
The test method for powder flow time shall be carried out in accordance with GB1482-84 "Standard funnel method for determination of metal powder fluidity (Hall flowmeter)" 4.4
.
GB8548-87
4.5 The test method for powder melting temperature shall be carried out in accordance with GB6526-86 "Determination method for solid-liquid phase temperature range of self-fluxing alloy powder".
5 Inspection rules
5.1 The product shall be inspected by the supplier's technical supervision department to ensure that the product quality meets the requirements of this standard and fill in the quality certificate. 5.2 The buyer shall inspect the product in time after receiving it. If the inspection result does not meet the requirements of this standard, it shall be reported to the supplier within three months from the date of receipt of the product, and the supplier and buyer shall negotiate to resolve it. If arbitration is required, the supplier and buyer shall jointly take samples at the buyer's side. 5.3 The products shall be submitted for inspection in batches, and each batch shall consist of powders of the same brand and category, with a batch size of no more than 400kg. 5.4 The sampling method for random inspection shall be carried out in accordance with GB5314-85 "Sampling method for powder metallurgy powder" 5.5 If the inspection result does not meet the requirements of this standard, double sampling shall be taken for the items that do not meet the requirements of this standard in the batch for re-inspection. If one of the results still does not meet the requirements of this standard, the batch of products shall be unqualified. 6
Packaging, storage, transportation, marking and quality certificate 6.1 The product must be dry before being packed into a hard container. The packaging should be tight to prevent moisture and leakage. 6.2 The product should be packaged in four specifications: 1kg, 2kg, 5kg and 10kg. 6.3
The name and trademark of the supplier, the name of the product, the brand and category, and the word "moisture-proof" or logo should be marked on the packaging container. Each batch of powder should be accompanied by a product quality certificate, which should indicate: 6.4
Supplier name and trademark;
Product name;
Brand and category;
Batch number;
Net weight;
All inspection results and the stamp of the technical supervision department; packaging date;
This label number.
6.5 Pay attention to moisture-proof when transporting the product.
The product should be stored in a dry, ventilated place without acid or alkali atmosphere to prevent oxidation. 6.6
Additional Notes:
This standard was drafted by Hunan Metallurgical Materials Research Institute. The main drafters of this standard are Zhang Ping, Wu Heyuan, Zhang Naiping and Liang Zhenya. National Standard of the People's Republic of China
Nickel-based spray alloy
GB8548--87
Published by China Standards Press
(Beijing Fuwai Sanlihe)
China Standards Press Beijing Printing Factory Printing Xinhua Bookstore Beijing Distribution Office Sold by Xinhua Bookstores in various places Copyright is exclusive and may not be reproduced
Format 880×12301/16 Printing sheet 1/2 Number of words 6000 First edition in March 1988 Second printing in March 1988 Number of copies 1-2500
Book number: 155066·1-5609
Heading 93-20
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