JB/T 9860.2-1999 This standard is a revision of NJ 385-85 "Technical Conditions for Tungsten Rods for Breaker Contacts". During the revision, only editorial changes were made according to relevant regulations, and the main content remained unchanged. This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of tungsten rods for breaker contacts for magneto motors. This standard is applicable to the quality spot check, supervision inspection, new product identification and entrusted inspection of tungsten rods for breaker contacts for magneto motors. This standard was first issued in 1985. JB/T 9860.2-1999 Technical Conditions for Tungsten Rods for Breaker Contacts JB/T9860.2-1999 Standard download decompression password: www.bzxz.net

[C527.020
Machinery Industry Standard of the People's Republic of China
JB/T9860.2—1999
Technical specifications for tungsten arm of breaker contact
1999-08-06 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/:86011www.bzxz.net
This standard is a revision of N138585 for breaker contacts, and the main technical contents have been changed. This standard will replace N38585 from the date of implementation. This standard is proposed and attributed to the Tianjin Internal Combustion Engine Research Institute: The responsible unit for this standard: Tianjin Internal Combustion Engine Research Institute: The responsible persons for this standard: Ma Wen, Shen Qi, and Zhou Jia. This standard was first issued in 1985.
Technical conditions. Revision, expansion of the original standard.
Machinery Industry Standard of the People's Republic of China
Technical conditions for tungsten arm of breaker contact
Technical specificarinnsFor tungsten arm of breaker contact
JBT9860.2-1999
385-85
This standard specifies the technical requirements, acid test methods, inspection rules and markings, packaging, transportation, storage and other aspects of tungsten arm of breaker contact for magnetic motors.
This standard is applicable to the quality inspection, quality testing, new product identification and magnetic testing of electric motors. 1 Referenced Standards
The following provisions are usually cited in this standard and constitute the main text of this standard. When this standard is published, the smaller version is valid. All standards are publicly marked. The parties using this standard shall discuss the possibility of using the latest version of the following standards. GB/F 230.-[99]
GB/T3458-1982
GR/T4196J984
GR/T-1197
GR/T 4324 1-4374.1984
GA/[ 4340—1984
Specifications, grades
Enterprise medical hardness test method
Pigeon powder technical parts
Hongming bar density determination method
Pigeon, sintered bars of alloys, controlled material grain measurement or chemical analysis method
Jinzhan Vickers hardness test method
3.1 cup effect B/T makes the FW specified in 58 "will be extremely, through scientific Final smelting method: The diameter of the pure code rod after spinning is:
4.0, 1.2.4.5, 4.7.5.0mm
3.3 The rod brand is CW-1.
Technical requirements
41 Chemistry, physics, elementary properties
4.1.1 Chemical composition meets the requirements of clothing 1. Tungsten purity machine impurity content
e=0.005: 0.003
Approved by the State Bureau of Machinery Industry on September 6, 1999
Implemented on January 1, 2000
1.2 Hardness: less than 191xcm
4.1.3 Hardness: not less than 7UHKA: J1B/9860.2—1999
4, 1. Microtexture: grains are uniform, vertical and horizontal should be perpendicular to the mother plane, the average value of the fiber thickness is less than 250 mm, and the number of broken grains is 75-250 mm.
4. Size and appearance||t 4.2.1 The diameter of the pigeon: The micro-difference and the shortened length should meet the requirements of clothing 2: 2
Diameter deviation
Finger length
4.2.2 The straightness of the rod is required to be within 2.00mm of the straightness, and the maximum deviation of the straightness shall not exceed 1rmm.4.2.3 The inside of the pigeon rod shall be free of patterns and defects, and the surface shall not have cracks, delamination, hair, obvious design marks, scratches and other defects. 5 Test methods
5.1 Chemical composition analysis shall be carried out in accordance with GB/T4324.1-4324.30. 5.2 Density determination method shall be carried out in accordance with G B door 4196. nim
5.3 Hardness determination shall be carried out according to GB/T210: 4.904N load, and the measured value shall be converted according to GB/434. The corresponding chain value shall comply with the HRA value. 5.4 The cross-section particle number determination shall be carried out according to G month 1197. The fiber length and electrical limit of the above method shall be tested, 5.5 In accordance with the requirements of 1.2.1, a two-point ruler and a meter ruler shall be used to check, 5.6 According to the requirements of 1.2.2, the following determination shall be carried out. 5.? According to the requirements of 4.2.3, each non-destructive probe in the tungsten rod shall be used. The external surface is inspected by the following inspection rules: 6 Inspection rules
6, 1 The product must be inspected by the supplier's quality inspection department to ensure that the product meets the standard requirements and fill in the price certificate 56.2 The buyer can inspect the received products. If the inspection results do not match the brand number and technical indicators indicated by the mark, the buyer shall submit a report to the buyer within one month after receiving the product. Both parties shall sign a joint agreement. If all the results do not match, it shall be considered unqualified. 63 Sampling shall be carried out according to the following regulations
6.3.1 Chemical or fractional inspection shall be carried out by randomly selecting from the same batch of products, taking samples at one quarter, and breaking them according to the requirements. 6.3.? Density, hardness and variety etc. are predicted and determined. Sampling can be carried out according to 53.1 requirements, and appropriate samples can be cut and tested. 4.1.1~4.1-1 can be noted. If the test results are unqualified, double sampling is required. If one of the results is unqualified, the batch of products is unqualified.
In the inspection of diameter deviation, shortness, self-regulation, surface quality and internal defects, each pigeon rod must be 4.2!, 4.222
18/7860.2-1999
and 1.2.! The inspection department shall record the inspection results of the door. If the inspection results do not meet the requirements, the inspection department shall check and accept the inspection results. 7.1 Each bundle shall be marked with a mark and note: a) material name, number and marking number; b) production number; 7.2 The bundle shall have the same order number, pallet number and specifications: 5 meters of tungsten rods shall be packed with paper and tied tightly with rope. 7.3 The tungsten packaging shall not be padded with paper in the box. The box shall be marked with "foaming agent" and "anti-moisture" and other labels. 7.4 The transportation shall prevent the package from turning over and snowing. The 75 pins shall be stored in a room that is not covered with quilts and has a gas atmosphere.
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