JB/T 7986-2001 JB/T 7986-2001 Common Abrasive Chrome Corundum JB/T7986-2001 Standard download decompression password: www.bzxz.net

JB/T79862001
This standard is a revision of JB/T7986-1995 (source GB5996-86) Chrome Corundum Technical Conditions. This standard divides chrome corundum abrasives into 100PA, 45PA, and 20PA materials according to the different uses of Cr, O, and content, so as to facilitate the production and selection of enterprises and users.
This standard replaces JB/T7986-1995 from the date of implementation. This standard is proposed and managed by the National Abrasives and Grinding Tools Standardization Technical Committee. This standard is drafted by Sand Co., Ltd. The main drafters of this standard are Ma Chao and Guo E. 191
Mechanical Industry Standard of the People's Republic of ChinawwW.bzxz.Net
Conventional abrasive--Pink fused aluminaJB/T 7986~-2001
Replaces JB/T 7986-1995
This standard specifies the codes, technical requirements, test methods, inspection rules and packaging of various grades of pink fused alumina. This standard is applicable to pink fused alumina used in the manufacture of cementing tools, etc. 2
Cited Standards
The provisions contained in the following standards are 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 discuss the possibility of using the latest versions of the following standards. GB/T 2481.1—1998
Consolidated abrasives for civil use
Detection and marking of dimensional sensitivity
GB/T3044-1989Chemical analysis methods for white jade and broom jadeGB/T 4676—1984
JB/T 65691993
JB/T 6570~1993
Sampling method for ordinary abrasives
Packaging of ordinary dense materials
Determination method for magnetic content
Pudao abrasives
JB/T 7984.3—2001
Ordinary free-cut materials
Determination of density
The code regulations for each brand of chromium jade materials are shown in Table 1. Table 1
Code of Luonan jade abrasive grades
4 Technical requirements
Chemical composition
The chemical composition of each grade of products is given in Table 2. 4.2 Density
Code of Luonan jade abrasive grades
Part 1: F4~F220
Cr, O, content range, %
0. 20~0. 45
>0. 45~1. 00
>1. 00 ~2. 00
Taking F46 particle size as the representative number, not less than 3.90g/em2, 4.3 The particle size composition shall comply with the provisions of GB/T2481.1. 4.4 Lost alloy particles
F30 and related grades are all ferroalloy particles that do not pass the 355μm sieve; F36F90 grades are all ferroalloy particles that fail to pass the tensile test at the bottom layer; F100-F220 grades are all ferroalloy particles that fail to pass the mixed particle lower sieve during the tensile test. China Machinery Industry Federation 2001-03-29 Standard 192
2001-07-01 Buy practice
Ductility content
JB/T7986-2001
All brands The chemical salt content of the product
Particle size range
F12~-F80
F90~F150
F180~F280
F12~F80
F90F150
F180~F220
F12FB0
F90~F150
F180~F220
The magnetic content of each brand of product is given in Table 3, Al,o,
98, 00
Chemical composition, %
Magnetic content of each brand of products
Density content, %
Particle size range
F12~F30
F36F60
F70~F120
F150-F220
Test method
Chemical composition shall be tested in accordance with GB/T3044, 5.1
Density shall be tested in accordance with JB/T7984.3, and tensile composition shall be tested in accordance with GB/T2481.1. 5.3
Ferroalloy and magnetic materials shall be inspected according to the provisions of JB/T6570. 5.4
Inspection rules
Sample extraction
Sample extraction and reduction shall be carried out in accordance with the provisions of GB/T4676. 6.2 Inspection
Granularity composition, ferroalloy grains and magnetic castings shall be inspected according to the requirements of the chemical composition. The representative number is given in Table 4. Cr,o,
0. 20 ~0, 45
>0. 45 L. 00
>1. 00~ 2. 00
0, 004 0
Particle size range
F12~P80
P90~F150
F180~F220
JB/T 7986--2001
Table 4 Chemical classification New representative number
When all the inspected items meet the technical requirements, the batch of products is judged to be qualified, and the packaging
is carried out according to the provisions of JB/T6569.
Representative number
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