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GOST 20559-75

STATE 12339-2016 GOST P 55433-2013 GOST P 55432-2013 GOST 4960-2009 GOST 9722-97 GOST 5494-95 GOST 19106-73 GOST 9453-75 GOST 20559-75 GOST 14086-68 GOST 9723-73 GOST 21125-75 GOST 5426-76 GOST 22025-76 GOST 13834-77 GOST 13833-77 GOST 9721-79 GOST 10285-81 GOST 12342-81 GOST 26719-85 GOST 13084-88 GOST 10096-76 GOST 2330-76 GOST 12343-79 GOST 4411-79 GOST 12338-81 GOST 26252-84 GOST 10284-84 GOST 26802-86 GOST 9849-86 GOST 3882-74 GOST 880-75 GOST 11378-75 GOST 4960-75 GOST 12601-76 GOST 12339-79 GOST 31290-2005 GOST 26630-85 GOST 26530-85 GOST 29278-92 GOST 25405-90 GOST 19046-80 GOST 25406-90 GOST 19078-80 GOST 24257-80 GOST 19065-80 GOST 24247-80 GOST 25412-90 GOST 25396-90 GOST 25400-90 GOST 25425-90 GOST 25410-82 GOST 25420-90 GOST 19074-80 GOST 19083-80 GOST 19048-80 GOST 25414-90 GOST 19062-80 GOST 25415-90 GOST 24253-80 GOST 24251-80 GOST 24249-80 GOST 24254-80 GOST 27302-87 GOST 25393-90 GOST 19067-80 GOST 25411-90 GOST 19068-80 GOST 25397-90 GOST 19059-80 GOST 19049-80 GOST 25398-90 GOST 19075-80 GOST 19061-80 GOST 20312-90 GOST 19051-80 GOST 25402-90 GOST 24252-80 GOST 25417-82 GOST 19043-80 GOST 20771-82 GOST 19081-80 GOST 19086-80 GOST 19056-80 GOST 19047-80 GOST 25421-90 GOST 25413-82 GOST 25418-82 GOST 27301-87 GOST 4872-75 GOST 19084-80 GOST 24255-80 GOST 19050-80 GOST 25401-90 GOST 19052-80 GOST 25426-90 GOST 25423-90 GOST 25399-90 GOST 19073-80 GOST 19057-80 GOST 2209-90 GOST 25403-82 GOST 19044-80 GOST 25408-90 GOST 25395-90 GOST 25409-90 GOST 25407-90 GOST 19071-80 GOST 28378-89 GOST 25419-90 GOST 19045-80 GOST 25003-81 GOST 25394-90 GOST 19077-80 GOST 19072-80 GOST 19080-80 GOST 17163-90 GOST 24250-80 GOST 25424-90 GOST 19063-80 GOST 19070-80 GOST 19076-80 GOST 24256-80 GOST 25422-90 GOST 25404-90 GOST 19064-80 GOST 24248-80 GOST 19069-80 GOST 19079-80 GOST 25416-90 GOST 19053-80 GOST 19042-80 GOST 19085-80

GOST 20559−75 (ISO 4884−78, ISO 4489−78) hard Alloys, ceramic tool materials. Acceptance rules and sampling methods (with Changes 1, 2, 3, 4)


GOST 20559−75
(ISO 4884−78,
ISO 4489−78)

Group 56

STATE STANDARD OF THE USSR

ALLOYS HARD MATERIALS CERAMIC TOOL

Rules of acceptance and sampling methods

Hard metals, ceramic tool materials.
Regulations of acceptance and methods of sampling

AXTU 1909

Valid from 01.01.76
before 01.01.96*
_______________________________
* Expiration removed by Protocol No. 5−94
The interstate Council for standardization,
Metrology and certification (I & C N 11/12, 1994). -
Note the manufacturer’s database.

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of nonferrous metallurgy of the USSR

DEVELOPERS:

Kudrya N. A. Tumanov V. I., Nechaev N. P.

2. APPROVED AND promulgated by the Decree of the State Committee of standards of Ministerial Council of the USSR from 04.03.75 N 574

3. INTRODUCED FOR THE FIRST TIME

4. Annexes 1 and 2 prepared by the direct application of international standards ISO 4884−78, ISO 4489−78

5. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

   
The designation of the reference document referenced
Paragraph number section
GOST 7933−89
2.2.2, 2.3.3
GOST 18242−72*
1.2.6

______________
* On the territory of the Russian Federation GOST R ISO 2859−1-2007, here and hereafter. — Note the manufacturer’s database.

6. Validity extended until 01.01.96 by the Resolution of Gosstandart of the USSR from 30.10.90 N 2733

7. REPRINT (September 1992) with Amendments No. 1, 2, 3, 4, approved in October 1983, July 1985, July 1987, October 1990 (IUS 2−84, 11−85, 12−87, 1−91)


This standard establishes the rules of acceptance and methods of sampling mixtures of powders of carbide and binder metal for the carbide; powders of oxide, carbide and ceramic tool materials and products from them.

It is allowed to conduct sampling according to international standards ISO 4884−78, ISO 4489−78 given in appendices 1 and 2.

(Changed edition, Rev. N 4).

1. ACCEPTANCE RULES

1.1. Mixture of powders of carbide and binder metal for the carbide and a mixture of powders of oxide, carbide and ceramic tool materials

1.1.1. For the party taking the powder composed of the averaged mixture of powders of the same brand of carbide and binder metal, are made on one technology, designed a document about quality that contains:

trademark or the name and trademark of manufacturer;

the name and brand of powder;

batch number;

the weight of the batch;

the results of the analysis;

the date of manufacture;

the designation of normative-technical document on the powder;

stamp of technical control.

The weight of the batch shall be not less than 200 kg for hard metals and not less than 50 kg for ceramic tool materials.

1.1.2. Coercivity, density, hardness, macrostructure, microstructure, porosity, elemental carbon, tensile strength in bending, cutting properties, the chemical composition of the carbide grade and density, cutting properties and tensile strength under bending for ceramic tool materials is determined by the results of testing the average of the sample, for which the party selected sample under the table.1.

Table 1

   
Number of packing units in the batch
Number of packing units in the sample,
not less than
1−5
All
6−15
5
16−35
7
36−60
8
61−100
10


Note. Every subsequent 100 packing units in the batch are selected one packaging unit.

1.1−1.1.2. (Changed edition, Rev. N 2).

1.1.3. If unsatisfactory test results of at least one indicator thereon, a second test, which is taken new average sample from the doubled sample taken from the same batch.

The results of repeated tests are final and apply to the entire party.

1.2. Sintered products made of hard alloys and products made of hot-pressed ceramic tool materials

1.2.1. Products adopt batches. The party should consist of products of one brand are made of an averaged mixture of powders according to one technology, and issued a document about quality that contains:

trademark or the name and trademark of manufacturer;

product name and grade;

batch number;

the weight of the batch;

the results of the tests;

the date of manufacture;

the designation of normative-technical document on the products;

stamp of technical control.

1.2.2. To check the coercive force, density, hardness, macrostructure, microstructure, porosity, free carbon, cutting and drilling properties of products of solid sintered alloys and to check the density, hardness and cutting properties of hot-pressed products of ceramic tool materials of the party selected sample in accordance with table.2.

Table 2

PCs

     
The number of items in a batch
The number of items in the sample, not less
  sintered hard alloys
ceramic tool materials
Up to 5000
40
6
SV. 5000 to 10000
60
10
SV. 10000
80
20



(Changed edition, Rev. N 2).

1.2.3, 1.2.4. (Deleted, Rev. N 3).

1.2.5. If unsatisfactory validation results at least one indicator thereon, a second test at twice the sample taken from the same batch.

The results of repeated tests are final and apply to the entire party.

1.2.6. Control of geometrical parameters, the level of control the levels of acceptance of defects for the parameters, the type of plan monitoring and classification of defects into critical, significant, minor are set by GOST 18242−72 in the normative-technical documentation for the products.

(Added, Rev. N 3).

2. METHODS OF SAMPLING AND SAMPLE PREPARATION

2.1. Mixture of powders of carbide and binder metal for the carbide and a mixture of powders of oxide, carbide and ceramic tool materials.

2.1.1. From each selected according to claim 1.1.2 of the packaging unit probe selected point of the sample, lowering it at the center of each container to the full depth.

2.1.2. Selected spot samples are combined in the combined sample, thoroughly mix and reduce to an average sample weight of not less than 200 g.

2.1−2.1.2. (Changed edition, Rev. N 2).

2.2. For physical-mechanical tests determination of macro — and microstructure from the average sample, obtained according to claim 2.1.2, prepare the samples in accordance with table.3.

Table 3

   
Name of the indicator
The number of samples is not less than
The coercive force of
12 PCs
Density
4 PCs
Hardness
4 PCs
Macrostructure
4 PCs
The microstructure, porosity, free carbon
4 PCs
Tensile strength in bending (polished samples)
12 PCs
Chemical composition
The total mass of the sample is less than 10 g



The total mass of the sample for chemical analysis shall be not less than 10 g.

For hard alloys definition of coercive force, density, cutting properties, hardness is performed on specially made plates of any tool shape that is convenient for subsequent testing; determination of tensile strength in bending is performed on shtapikah. Definition of macrostructure, microstructure, porosity and free carbon is carried out on two samples: one cutting plate and one stabile. For ceramic tool materials determination of density and hardness is carried out on the samples made to determine the cutting properties.

Fabrication of samples for testing carried out in the equipment and technological modes adopted to the products of the respective brand. The final operation in the manufacture of samples for all types of tests carried out simultaneously in one and the same container (the boat), form.

(Changed edition, Rev. N 2, 3).

2.2.1. Made from a medium sample, the samples are divided into two parts, one of which subjected to testing and the other stored in for three months in case of differences in the assessment of quality.

2.2.2. Samples should be wrapped in heavy paper and Packed in cardboard boxes according to GOST 7933−89 or in boxes and pencil cases from any organic plastic masses.

On the box label that contains:

a) mark of a hard alloy or ceramic tool material;

b) the batch number;

C) designation of the products;

g) date of sampling;

d) the number of items in a batch;

e) the stamp of technical control.

2.3. The sintered product of carbide and hot-pressed and products made of ceramic tool materials.

2.2.2, 2.3. (Changed edition, Rev. N 2).

2.3.1. For testing of products taken according to claim 1.2.2, conduct sampling in accordance with table.4.

Table 4

   
Name of the indicator
The number of samples, PCs, not less
Density
4
Hardness
4
Macrostructure
10
Microstructure, porosity and free carbon

Cutting properties:
4
turning
4
milling
6
drilling properties
6
The coercive force of
40



For products made of hard alloys definition of coercive force, density, hardness, macrostructure, microstructure, porosity, free carbon, cutting and drilling properties is carried out on the samples selected to determine the coercive force. The definition of density and hardness performed on the same samples. Definition of cutting, drilling properties, microstructure, porosity and free carbon is carried out on the samples with the smallest and largest value of the coercive force.

For the production of ceramic tool materials determine the density, hardness and cutting properties (turning). Determination of density, hardness and cutting properties is carried out on the same samples.

(Changed edition, Rev. N 1, 2, 3).

2.3.2. The selected sample is divided into two parts, one of which subjected to testing and the other stored in for three months in case of differences in the assessment of quality.

2.3.3. Samples should be wrapped in heavy paper and Packed in cardboard boxes according to GOST 7933−89 or in boxes and pencil cases from any organic plastic masses.

On carton and label containing:

a) mark of a hard alloy or ceramic tool material;

b) the batch number;

C) date of sampling;

g) the designation of the goods;

d) the number of items in a batch;

e) the stamp of technical control.

(Changed edition, Rev. N 2).

ANNEX 1 (recommended). Alloys, solid. Sampling and testing of powders for sintered samples (ISO 4884−78)

ANNEX 1
Recommended

ALLOYS, SOLID

Sampling and testing of powders for sintered samples (ISO 4884−78)

1. Purpose and scope

This standard establishes the methods of sampling, preparation of samples and testing of powder mixtures for the production of hard alloys.

2. Links

ISO 3326−75 Hard alloys. The method of determining the coercive force (magnetization).

ISO 3327−82 Hard alloys. Determination of ultimate strength in lateral bending.

ISO 3369−75 Impermeable sintered metal materials and hardmetals. The definition of density.

ISO 3738−83 Alloys, solid. Measurement of hardness by Vickers.

ISO 3954−77 Powders used in powder metallurgy. Sampling.

ISO 4499−78 Alloys, solid. Method for metallographic determination of microstructure.

ISO 4505−78 Alloys, solid. Methods of metallographic determination of porosity and content of graphite.

3. Definition

Terms and definitions — ISO 3954−77.

4. Sampling

4.1. Sampling from the batch carried out in accordance with ISO 3954−77.

4.2. In the case that the serving of powder mixed in one load in one mixer immediately before the separation of the containers, as agreed between manufacturer and consumer from the mixer can be taken one or more samples for research.

5. Preparation of samples for testing

5.1. Test specimens shall be made of tested workpieces according to their brand and size. All samples for each type of test is sintered simultaneously in the same conditions and the same furnace.

5.2. Properties of the samples made from this batch of powder, are significant only in the case if in the process of their production apply appropriate production conditions.

5.3. The sizes of the samples must comply with the requirements of relevant international standards. To determine the porosity of thin sections prepared from one or more samples so that the total survey area was at least 1 cmГОСТ 20559-75 (ИСО 4884-78, ИСО 4489-78) Сплавы твердые, материалы керамические инструментальные. Правила приемки и методы отбора проб (с Изменениями N 1, 2, 3, 4).

6. Test

The test is usually conducted on the sintered samples obtained from a specific batch of powder, are given in the table.

   
Test method
International standard
The definition of coercive force
ISO 3326−75
Determination of ultimate strength in lateral bending
ISO 3327−82
Determination of density
ISO 3369−75
Hardness HRA
ISO 3738−82
Hardness HV
ISO 3878−83
The study of the microstructure
ISO 4499−78
Determination of porosity and unbound carbon
ISO 4505−78


Note. The definition of the properties specified in the table can be performed on the same samples, but the hardness, microstructure and porosity should be conducted to determine the tensile strength in transverse bending.

APPENDIX 2 (recommended). Sintered hard materials. Sampling and testing (ISO 4489−78)

ANNEX 2
Recommended

SINTERED HARD MATERIALS

Sampling and testing (ISO 4489−78)

1. Purpose and scope

This international standard specifies sampling and testing of sintered hard alloys to determine their physical and mechanical properties.

2. Links

ISO 3326−75 Hard alloys. The method of determining the coercive force.

ISO 3369−75 Impermeable sintered metal materials and hardmetals. The definition of density.

ISO 3738/1−82 sintered hard Alloys. Definition of Rockwell hardness (scale A).

ISO 3878−83 Alloys, solid. Measurement of hardness by Vickers.

ISO 4499−78 Alloys, solid. Methods of metallographic determination of microstructure.

ISO 4505−78 Alloys, solid. Methods of metallographic determination of porosity and content of graphite.

3. Definition

3.1. Party — a certain number of homogeneous sintered products of the same size and quality.

3.2. Sample for testing — one or more products taken from the party to define the properties.

4. Sampling

Carbide products are supplied in a large range of sizes and quantities for wide range of applications. In addition, the determination of physical and mechanical properties requires a significant investment and sometimes associated with destruction. It is therefore undesirable and impractical to apply this amount of samples, which is usually used to control dimensional characteristics. Thus, the degree of uniformity can be determined economically in the process of production control. To confirm this quality hard alloy is usually sufficient to take one sample (one item).

5. Test methods

5.1. Test methods which are carried out on the sample given in table.1.

Table 1

   
The type of test
International standard
The definition of coercive force
ISO 3326−75
Determination of density
ISO 3369−75
Hardness HRA
ISO 3738/1−82
Hardness HV
ISO 3878−83

5.2. Tests that can be conducted in special cases, are given in table.2.

Table 2

   
The type of test
International standard
The study of the microstructure
ISO 4499−78
Determination of porosity and unbound carbon
ISO 4505−78

6. The test report

Sintered products bought in small quantities or taken from reserves. Therefore, it is impossible to keep the identity of the party, and, therefore, you cannot rely on the fact that each order can be submitted the test report.