JB/T 9762-1999 This standard is a revision of ZB J92 003-87 "Inspection Standard for Aluminum Pistons with Wear-Resistant Rings for Internal Combustion Engines". During the revision, editorial changes were made in accordance with relevant regulations, and the technical indicators of the bonding strength between the wear-resistant ring and the aluminum piston body were modified to be consistent with GB/T 1148-1993 "Technical Conditions for Aluminum Pistons for Internal Combustion Engines". This standard specifies the names, technical requirements and inspection methods of various parts of aluminum pistons with wear-resistant rings for internal combustion engines. This standard is applicable to aluminum pistons with wear-resistant rings for reciprocating piston internal combustion engines with a cylinder diameter of less than or equal to 200mm. This standard was first issued in 1987. JB/T 9762-1999 Technical Conditions for Aluminum Pistons with Wear-Resistant Rings for Internal Combustion Engines JB/T9762-1999 Standard download decompression password: www.bzxz.net

1C.S 27. 020
Machinery Industry Standard of the People's Republic of China
JB/T 9762-1999
Internal combustion engines
Aluminum pistons with wear-resistant rings
Technical conditions
Internal combustion engies-Pistons with carrier insertSpecifications
Published on September 17, 1999
National Machinery Industry
Implemented on January 1, 2000
JB/T9762-1999
This standard is a revision of 2B192003-87 "Inspection Standard for Aluminum Pistons for Internal Combustion Engines". The original standard has been edited and revised according to the technical indicators of the bonding strength between the wear ring and the piston body to make it consistent with GB/T148-1992 or Technical Conditions for Aluminum Pistons for Internal Combustion Engines". This standard replaces 2B392003-87 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Internal Combustion Engines. The drafting unit of this standard is Shanghai Internal Combustion Engine Research Institute, and the main author of this standard is Li Guoxi.
This standard was first issued in 1987.
Standard of the Machinery Industry of the People's Republic of China
Internal combustion engine
Caged aluminum wear-resistant pistons
Technical conditions
Internal eombusliun caginles-Pistonswith earrierinsert-Snecifications
This standard specifies the names of various parts, technical requirements and inspection methods of aluminum wear-resistant pistons for internal combustion engines. This standard is applicable to radial type internal combustion aluminum wear-resistant pistons with a diameter of less than 200mm. 2 Reference standards
JBrT9762-1949
H 92 1K13-9?
The texts contained in the following standards become the provisions of this standard through reference in this standard. This standard is published and the editions shown are all in numbers. All standards will be revised. The parties who use this standard should explore the possibility of using the latest version of the following standards. GB.T 1173—1995 Cast aluminum alloy GB1148-1993 Technical conditions for aluminum plugs in internal combustion engines JB/16289—[992] JE,T8892—[999] Metallographic inspection of internal combustion engine components Metallographic inspection of rare earth alloy pistons in internal combustion engines Part names See table and figure for part names. Table!
Along the body of the pistonwww.bzxz.net
The inner grinding and plating ring is passed through the upper and lower planes
Inlaid to the lower part
Approved by the State Administration of Machinery Industry on September 17, 1999
The second ring regret
Paowanggan
2000-01-1 Implementation
4 Technical requirements
4.1 Aluminum piston body material
JB/T 9762-1999
4.1.1 Material: ZT.109 in GB/T1173-1995; 66-1 rare earth alloy or other aluminum alloy with equivalent performance a) The chemical composition of z1.109 is shown in Table 2.
Element name
or content
11.0-13.0
Note: Total impurities not listed are 1.2%, the balance is aluminum A1, b! The chemical composition of 66-1 rare earth eutectic pin silicon alloy is shown in Table 3. Table 3
Element name
Note: Residue AI
Mechanical properties
Content content
10.5-12.5
0.45 -5.50
0.35-0.55
Element name
Metallic name
Mixed soil RE
Compound content
JB/T 9762—1999
Strength greater than or equal to 200MPa: 95-130HBS4.1.3 Physical properties
Density greater than or equal to 2.71 gtcm; Thermal conductivity greater than or equal to 153 W/m·［175T ;The average linear tension coefficient is:
20-100, 19.9×10°/9;
20-200, 21.310/9
20-300, 22.3×10-/℃,
4.1.4 Metallurgical structure
Metallurgical structure shall comply with the provisions of JB6289 and IB/T8892. 4.2 Wear-resistant inlay materials
4.31 Material: high-strength austenite casting, chemical composition see Table 4, Table 4
Metallurgical name
Note: Fe
4.2.2 Mechanical properties
Composition
. .2-3
Element name
Elastic modulus E is greater than or equal to 96.5×F0°MPa; tensile strength is greater than or equal to 170MPa: tensile strength u is greater than or equal to +388MPa: hardness is 140-19HBS (79~91HR) 4.2.3 Physical properties
Complexity 2 is greater than or equal to 7.3/cm: thermal conductivity is greater than or equal to 44W/m: (175r): at 20-200℃, the half-mean expansion coefficient α is greater than or equal to 18×106/%
4.2.4 Residual phase structure
4.2.4.1 The body is austenitic and has 2%-5% evenly distributed, fine alloy carbides and compounds. 4.2.4.2 The main types of the stone are B and A, and a small amount of U and E. The total number of types D and E shall not exceed 40%; the length of the stone is 15-120m, and a small amount of 120-250m is allowed, but the number shall not exceed 20% (the length of the stone is calculated based on the straight-line distance between the two ends of the stone). 4.3 No part of the dense decay pattern shall have defects such as pores, shrinkage, cracks, and local cold surface. 4.4 Quality requirements for the bonding between the dense decay pattern and the lead body 4.4.1 The area bonding rate of the dense decay pattern and the lead body (single side): non-supercharged diesel engine greater than or equal to 85%: supercharged diesel engine greater than or equal to 3%. 4.1 The length of a single defect at the bonding between the dense decay ring and the aluminum body: non-supercharged diesel engine less than or equal to 10% of the circumference: supercharged diesel engine less than or equal to 5% of the circumference. JB/T9762-1999
4.4.3 The gap between the two defects at the junction of the zinc plate and the aluminum piston body must be greater than or equal to 9% of the circumference, 4.4 The gap between the wear-resistant insert and the aluminum piston body must be less than or equal to 9% of the circumference, 4.5 The microhardness of the bonding layer between the wear-resistant insert and the aluminum piston body is 550~6501IV4.6 The bonding tensile strength between the wear-resistant insert and the corresponding piston body is less than or equal to 10MPa4? The R value of the wear-resistant insert is less than or equal to 0.8m. 4. The warranty period of the plug is 6000h. Under normal use, the user shall ensure that the product is not damaged during the warranty period and replace it at the manufacturer.
4.9Except as specified in this standard, other technical requirements for tightness shall comply with the provisions of GB/T1148. 5 Inspection method
5. Each aluminum piston must be inspected by the manufacturer (only after passing the inspection can it be shipped out. Inspection items are: a) Appearance quality:
) Front chain measurement and lead penetration test, surface roughness;
d! 5.2 The wear-resistant insert, lead seal, chemical composition and mechanical properties shall be checked regularly. 5.3 Test method for the bond strength between the wear-resistant insert and the piston body 5.3.1 Test method for the wear-resistant insert and the piston body 5.3.1 Test method for the wear-resistant insert and the piston body 5.3.1 Test method for the wear-resistant insert and the piston body 5.3.2 Test method for the wear-resistant insert and the piston body 5.3 ... 9
The specimen is shown in Figure 4. The test is carried out on a universal scratch testing machine. Figure 4
5.3.3 Adhesion strength is calculated using formula (1): Formula: O.——Adhesion shrinkage strength, MPa;
K—Surface conversion coefficient, 0.99
Test fracture load, N:
S Sample cross-sectional area, m
Test specification
5.4 The Brinell diameter of the wear-resistant mesh is t97.5/2.5,30. The Brinell hardness of the piston is 62.5/2.5/30 standard, the microscopic accuracy of the bonding layer between the steel plate and the aluminum piston body is tested using a load of more than 50%. 5. 4
The inspection methods for the dimensional tolerance and position accuracy of the steel plated aluminum piston are in accordance with the provisions of BT1148.
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