JB/T 7154-1993 Specifications for steel sections for wheeled engineering machinery

This standard specifies the type and size, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of steel for wheeled engineering machinery. This standard applies to steel for wheeled engineering machinery. JB/T 7154-1993 Technical conditions for steel for wheeled engineering machinery JB/T7154-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T7154-93
Steel for Wheels of Wheeled Engineering Machinery
Technical Conditions
Published on November 21, 1993
Ministry of Machinery Industry of the People's Republic of China
Implemented on March 1, 1994
Mechanical Industry Standard of the People's Republic of Chinabzxz.net
Steel for Wheels of Wheeled Engineering Machinery
Technical Conditions
Subject Content and Scope of Application
JB/T 715493
This standard specifies the type and size, technical requirements, test methods, inspection rules and markings, packaging, transportation and storage of steel for wheels of wheeled engineering machinery.
This standard applies to steel for wheels of wheeled engineering machinery. 2 Referenced Standards
GB 228
GB 699
GB 1814
GB2101
Sampling method for chemical analysis of steel and allowable deviation of chemical composition of finished productsChemical analysis methods for steel and alloys
Metal tensile test method
High-quality carbon structural steel
Carbon structural steel
Fractometry test method for copper materials
Technical parts
Acceptance and packaging of steel: General provisions for marking and quality certificateMicroscopic evaluation method for non-metallic inclusions in steelGB10561
3 Types and dimensions
The cross-sectional type and dimensions of the locking ring shall comply with the provisions of Figures 1 and 2. 3.1
Approved by the Ministry of Machinery Industry on November 21, 1993
Implemented on March 1, 1994
JB/T 7154 93
3.2 The cross-sectional type and size of the clamping ring shall comply with the provisions of Figures 3 and 4. 12±0
F0 at 12
4 Technical requirements
4.1 Materials and mechanical properties
The materials and mechanical properties of the steel shall comply with the provisions of Table 1. Table 1
Steel name
Lock band
Material used
Note: 50 steel is the mechanical property index after heat treatment. Exhibition point 6
≥375
Anti-lift strength.
375~460
Length ratio,
4.2 The chemical composition of the lock pattern and the lock groove pattern shall comply with the provisions of GB699 and GB700 respectively. The surface of the profile shall not be allowed to have cracks, scars, folds and inclusions. 4.3
Delivery status
The steel should be straight and no bending is allowed. The straightness (arch> error) on the cross section of the lock groove pattern shall not be greater than 1m1m. 4.4
4.5 The bending deformation or error of the profile shall not be greater than 0.8% of the total length. 4.6
The torsional deformation or error of the plastic steel shall not be greater than 2\/5m. The profile shall not have obvious rotation with the parts. 1.7
JB/T 7154—93
After the two ends of the steel are cut off, serious local deformation is not allowed. 4.8 On the surface of the steel, there shall be no shrinkage residues, delamination, cracks and similar debris visible to the naked eye. 4.9
The level of oxides and sulfonates contained in the lock ring steel shall not be lower than level 3.0. The intersection of the arc and the straight line of the steel profile shall be smooth. The roughness R. value of the steel surface is 50μm.
The delivery length of the steel profile shall comply with the following provisions. 4.12.1
The total length L of the steel profile is calculated as follows:
Lnl+100
Where: - multiple base, should be 1.23, 41-by the user Determine. mm.
4.12.2 The limit deviation of the total length of the steel section is + 50mm. 5 Test method
The weight shall not exceed 30t as a batch, and the test shall be carried out batch by batch. The test items, sampling locations and test methods of each batch of steel sections shall comply with the provisions of Table 2. Table 2
Inspection rules
Tensile test
Chemical composition
Non-metallic impurities
Type, size, bending error
Diameter
Surface roughness
Surface quality
Sample size
Sampling part
Steel sections of different roots||tt ||According to the provisions of GB222
Different root type pins
Different root type pins
Before leaving the factory, the steel section should be inspected by the quality inspection department of the rolling mill in accordance with this standard. Steel sections should be inspected and accepted in batches.
The sampling quantity for steel section inspection shall comply with the provisions of Table 2. The judgment rules for steel sections shall comply with the provisions of GB2101. When there are special requirements for acceptance, the user and the manufacturer shall agree. Marking, packaging, transportation and storage
The marking and packaging of steel sections shall comply with the provisions of GB2101. It is strictly forbidden to bend steel sections during transportation and storage, and rain and moisture-proof measures shall be taken. Test method
According to the provisions of GB228 According to the provisions of GB223, according to the provisions of GB10561, according to the provisions of GB1814, according to the provisions of GB1814, and with universal measuring tools or special sample plates on the platform, and with surface stability comparison sample blocks. Additional remarks: JB/F7154-:93. This standard was proposed and managed by Tianjin Engineering Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Tianjin Engineering Machinery Research Institute, Changcheng Daishu Steel Company Electromechanical Steel Rolling Plant, and Pidu Engineering Machinery Manufacturing Plant. The main drafters of this standard are Xu Xiangshan, Zhu Xuepin, and Xiao Taixing.
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