JB/T 7996-1999 JB/T 7996-1999 Common abrasive single crystal corundum JB/T7996-1999 Standard download decompression password: www.bzxz.net

JB/T79961999
This standard is a revision of the technical conditions of single crystal corundum in JB/T7996-95 (formerly GB10174-88). The technical content of this standard is consistent with that of JB/T7996-95, and only the relevant provisions have been re-edited. This standard replaces JB/T7996-95 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Abrasives and Tools. The drafting unit of this standard: Sisha Co., Ltd. The main drafters of this standard: Luo Shucai, Duan Xuebei, Wang Hongzheng. 224
Mechanical Industry Standard of the People's Republic of China
Ordinary Abrasives
Single Crystal Corundum
This standard specifies the technical requirements, test methods, inspection rules and packaging of single crystal corundum. This standard applies to single corundum by-products used in the manufacture of grinding and abrasive materials, etc. 2
Referenced Standards
JB/T 7996-1999
Replaces JB/T T996-95
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 2481.1—1998
Materials for consolidated densification
GB/T 8043—1989Www.bzxZ.net
GB/T 4676-1984
JB/T 6569-1993
JB/T 6570—1993
Inspection and marking of particle size composition Part 1: Chemical analysis method for wide-grained F4~F22C brown corundum
Sampling method for ordinary materials
Packaging of ordinary materials
Determination method of magnetic content
Ordinary abrasives
JB/T 7984. 3-—1995
Technical requirements
Ordinary abrasives
The chemical composition shall conform to the requirements of Table 1.
Grain health model
F24F90
F100~F220
Film particle density determination method
Topic Light density: F46 (representative number) not less than 3.95g/em. 3.2
3.3 Degree group or: should meet the requirements of GB/T2481.1. Al,o.
6,98-50
Content of ferroalloy particles: F24~F90 are measured with the ferroalloy particles of the bottom sieve number when the particle size inspection is not met; F100 and above are measured with the ferroalloy particles of the mixed particles of the lower sieve when the particle size inspection is not met. The content of magnetic matter shall comply with the provisions of Table 2.
Particle size range
F24~F60
F70~F120
F150-F220
Test method
Chemical composition shall be inspected in accordance with the provisions of GB/T3043, 4.1
National Machinery Industry Bureau 1999-05-20 Standard Table 2
Numerical content
60. 010 6
≤,0. 009 0
2000-01-01 Implementation
JB/T 7996-1999
The particle density shall be tested in accordance with the provisions of GB/T7984.3. 4.2
4.3 The particle composition shall be tested in accordance with the provisions of GB/T2481.1. 4.4 The content of fast alloy particles and toxic substances shall be tested in accordance with the provisions of JB/T6570. 5 Inspection rules
5.1 The extraction and reduction of test bars shall be carried out in accordance with the provisions of GB/T4676. 5.2 Each batch of products shall be inspected in accordance with the technical requirements. When all the inspected products meet the technical requirements, the batch of products shall be qualified. 6 Packaging
According to the provisions of JB/T6569,
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