GOST 4872-75
GOST 4872−75 Products for cutting tools made of hard sintered alloys. Specifications (with Amendments No. 1, 2, 3)
GOST 4872−75
Group 56
INTERSTATE STANDARD
PRODUCTS FOR CUTTING TOOLS MADE OF HARD SINTERED ALLOYS
Specifications
Sintered hard alloys products for cutting tool. Specifications
ISS 77.160
OKP 19 6000
Date of introduction 1976−01−01
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the Ministry of nonferrous metallurgy of the USSR
DEVELOPERS
N.Kudrya, A. A. Zaluzhny
2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from
3. REPLACE GOST 4872−75
4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS
| The designation of the reference document referenced |
The number of the paragraph, subparagraph |
| GOST 2209−90 |
1.4, 2.2 |
| GOST 2991−85 |
4.1.4 |
| GOST 3882−74 |
1.2 |
| GOST 5679−91 |
4.1.1 |
| GOST 7438−73 |
4.1.2 |
| GOST 7933−89 |
4.1.2 |
| GOST 8273−75 |
4.1.2 |
| GOST 9391−80 |
3.7 |
| GOST 13833−77 |
1.3, 1.4 |
| GOST 13834−77 |
1.3, 1.4 |
| GOST 14192−96 |
4.1.5 |
| GOST 15846−2002 |
4.1.8 |
| GOST 17163−90 |
1.3, 1.4 |
| GOST 19043−80 |
1.3 |
| 19044−80 GOST — GOST 19053−80 |
1.3, 1.5, 1.8, 2.3 |
| GOST 19056−80 |
The same |
| GOST 19057−80 |
« |
| GOST 19059−80 |
« |
| 19061−80 GOST — GOST 19065−80 |
« |
| 19067−80 GOST — GOST 19081−80 |
« |
| 19083−80 GOST — GOST 19085−80 |
« |
| GOST 19086−80 |
2.3, 4.2.1 |
| GOST 20017−74 |
3.1 |
| GOST 20018−74 |
3.2 |
| GOST 20019−74 |
3.3 |
| GOST 20312−90 |
1.3, 1.4, 1.8, 2.2 |
| GOST 20559−75 |
2.2, 2.5 |
| GOST 20771−82 |
1.3, 1.4, 1.8, 2.2 |
| 24247−80 GOST — GOST 24257−80 |
1.3, 1.5, 1.8, 2.3 |
| 25394−90 GOST — GOST 25402−90 |
1.3, 1.4, 1.8, 2.2 |
| GOST 25403−82 |
The same |
| 25404−90 GOST — GOST 25409−90 |
« |
| GOST 25410−82 |
« |
| GOST 25411−90 |
« |
| GOST 25412−90 |
« |
| GOST 25413−82 |
« |
| 25414−90 GOST — GOST 25416−90 |
« |
| GOST 25417−82 |
« |
| GOST 25418−82 |
« |
| 25419−90 GOST — GOST 25426−90 |
1.3, 1.8 |
| GOST 25599.1−83 — GOST 25599.4−83 |
3.10 |
5. Limitation of actions taken by Protocol No. 5−94 of the Interstate Council for standardization, Metrology and certification (ICS 11−12−94)
6. EDITION with Amendments No. 1, 2, 3 approved in December 1984, June 1987, July 1990 (IUS 3−85, 12−87, 10−90)
This standard covers brazed and replaceable products made of hard sintered alloys, designed for cutting tools in machining of metals and non-metallic materials.
1. TECHNICAL REQUIREMENTS
1.1. Products made of hard alloys grades GOST 3882 and normative-technical documentation.
1.2. Physico-mechanical properties of hard alloys (density, tensile strength in bending, hardness) should correspond to GOST 3882 and normative-technical documentation.
1.3. Design and dimensions should correspond to GOST 13833, 13834 GOST, GOST 17163, GOST 25394 — 25426 GOST, GOST 20771, 20312 GOST, GOST 19043 — 19053 GOST, GOST 19056, 19057 GOST, GOST 19059, 19061 GOST — GOST 19065, 19067 GOST — GOST 19081, 19083 GOST — GOST 19085, 24247 GOST — GOST 24257.
1.4. Limit deviations of linear and angular dimensions, surface condition, deviations of form and position of surfaces of products, manufactured according to GOST 13833, 13834 GOST, GOST 17163, GOST 25394 — 25426 GOST, GOST 20771, GOST 20312, must meet the requirements of GOST 2209.
1.5. Limit deviations of linear and angular dimensions, surface condition, deviations of form and position of surfaces of products, manufactured according to GOST 19043 — 19085 GOST, GOST 24247 — GOST 24257, must meet the requirements of GOST 19086.
1.1−1.5. (Changed edition, Rev. N 1).
1.6. The surface must be clean, free of cracks, rosslea, blisters.
1.7. The macrostructure of the product should be homogeneous, without foreign inclusions and rosslea.
1.8. The microstructure of the products, manufactured according to GOST 13833, 13834 GOST, GOST 17163, GOST 25394 — 25426 GOST, GOST 20771, 20312 GOST, GOST 19043 — 19053 GOST, GOST 19056, 19057 GOST, GOST 19059, 19061 GOST — GOST 19081, 19083 GOST — GOST 19085, 24247 GOST — GOST 24257 must conform to the standards specified in the table.
| Mark |
Volumetric content of pores, %, no more |
Bulk content of free carbon, %, no more |
Phase |
Phase | ||
| Grain size, µm |
The amount of grains, %, not less |
Value grain, mkm |
The amount of grains, %, not less | |||
| Vkz |
0,2 |
0,2 |
1−2 |
50 |
- |
- |
| VKSM |
0,2 |
0,2 |
To 1 |
50 |
- |
- |
| VK6 |
0,2 |
0,2 |
1−2 |
50 |
- |
- |
| ВК6М |
0,2 |
0,2 |
To 1 |
50 |
- |
- |
| VK6-OM |
0,2 |
0,2 |
To 1 |
60 |
- |
- |
| VK8 |
0,2 |
0,2 |
1−2 |
50 |
- |
- |
| ВК10 HOM |
0,2 |
0,2 |
To 1 |
60 |
- |
- |
| ВК15 |
0,2 |
0,5 |
1−2 |
50 |
- |
- |
| Т30К4 |
0,2 |
0,3 |
- |
- |
1−2 |
50 |
| T15K6 |
0,2 |
0,4 |
1−2 |
50 |
2−5 |
50 |
| Т14К8 |
0,2 |
0,3 |
1−2 |
50 |
2−5 |
50 |
| Т5К10 |
0,2 |
0,3 |
2−3 |
50 |
- |
- |
| Т8К7 |
0,2 |
0,2 |
1−2 |
75 |
- |
- |
| ТТ7К12 |
0,2 |
0,3 |
2−5 |
50 |
- |
- |
| ТТ8К6 |
0,2 |
0,4 |
To 1 |
50 |
- |
- |
| ТТ10К8-B |
0,2 |
0,3 |
1−2 |
50 |
- |
- |
| ТТ20К9 |
0,2 |
0,1 |
1−2 |
75 |
1−2 |
75 |
Notes:
1. In determining the number of grains at 100% to take the number of grains of each carbide phase.
2. The presence in the structure of the inclusions of phase (double tungsten carbide and cobalt lace and ozerkovy forms) is not allowed.
3. Having a separate coarse grains of the phase, the size of which is 10 times greater than the maximum specified in the table is not allowed.
(Changed edition, Rev. N 1, 3).
1.8.1. Not allowed pore of over 50 µm in products with thickness up to 2 mm, inclusive, more than 75 µm in products with a thickness of 2 to 4 mm inclusive and greater than 100m in products of thickness greater than 4 mm.
1.8.2. For polished products, mechanically attached in the working zone (at a distance of 1.5 mm from the cutting edge on the front and rear surfaces), not allowed to have more then 50 microns.
The other surfaces allowed the presence of some large pores up to 100 µm.
1.9. Products from hard alloys to withstand the test of cutting. Norm resistance of cemented carbide products when tested and cut are set according to normative-technical documentation approved in the established order.
1.10. Products made of hard alloys can be supplied with wear-resistant coatings. Technical requirements for products with wear-resistant coatings are set according to normative-technical documentation approved in the established order.
2. ACCEPTANCE RULES
2.1. The sintered product to the acceptance of the present parties. For the party taking any number of products, hard alloy formulator one, same brand, made from the averaged mixture of powders of carbide and binder metal in one technological process, simultaneously, the requirements for acceptance furnished by a single document about quality that contains:
is the trademark or name and trademark of manufacturer;
— grade and form of the product;
— the batch number;
— test results;
— the weight of the batch;
— date of issue;
stamp of technical control;
— the designation of this standard.
2.2. Rules of acceptance of products, manufactured according to GOST 13833, 13834 GOST, GOST 17163, GOST 25394 — 25426 GOST, GOST 20771, GOST 20312, must meet the requirements of GOST 20559.
2.1, 2.2. (Changed edition, Rev. N 2).
2.3. Rules of acceptance of products, manufactured according to GOST 19043 — 19053 GOST, GOST 19056, 19057 GOST, GOST 19059, 19061 GOST — GOST 19081, 19083−19085 GOST, GOST 24247 — GOST 24257, must meet the requirements of GOST 19086.
(Changed edition, Rev. N 1).
2.4. Allowed the manufacturer to determine the micro — and macrostructure, physical and mechanical and cutting properties of the products of one brand are made of an averaged mixture of powders of carbide and binder metal on one technology, on a sample selected according to GOST 20559.
2.5. Check the chemical composition of the products of the manufacturer is carried out on the mixtures according to GOST 20559.
2.4, 2.5. (Added, Rev. N 2).
2.6. (Deleted, Rev. N 3).
3. TEST METHODS
3.1. Determination of the density of the products is done according to GOST 20018.
3.2. Determination of the Rockwell hardness is carried out according to GOST 20017.
3.3. Determination of ultimate strength in lateral bending is carried out according to GOST 20019.
3.4. Size, concavity and convexity of the goods to check a measuring instrument or device, ensuring the necessary measurement accuracy.
3.5. The depth of pitting, and fillet determine size of the optical device with a scale interval of 0.1 mm.
3.6. The macrostructure of the products in the bend test at 20−30 x magnification.
3.7. The microstructure of the products is checked according to GOST 9391.
3.8. The inspection of the surface is carried out without the use of magnifying devices.
3.9. Cutting properties of the products test according to normative-technical documentation.
(Changed edition, Rev. N 1).
3.10. Determination of the chemical composition of products of hard alloys is carried out on the mixtures according to GOST 25599.1 — GOST 25599.4.
(Added, Rev. N 2).
4. MARKING, PACKAGING, TRANSPORTATION AND STORAGE
4.1. Brazed products
4.1.1. On one of the wide planes (except the reference) each product shall be marked with paint grade hard alloy.
Articles having a plane area less than 1.0 cmor complex surface, not mark.
4.1,
4.1.2. The same shape, size and carbide grade should be wrapped in thick paper according to GOST 8273 or GOST 7438 or sealed in plastic wrap in an individual cell for each product. Allowed when Packed in thick paper apply cotton wool GOST 5679. Then, the product must be Packed in boxes made of cardboard according to GOST 7933 or boxes and pencil cases from any organic plastic masses (each no more than 2 kg) according to normative-technical documentation.
(Changed edition, Rev. N 2).
4.1.3. On every box or pencil case and label where you indicate:
is the trademark or name and trademark of manufacturer;
form of the product;
— brand alloy;
— the batch number;
— the number of items and their weight;
— date of issue;
stamp of technical control;
— the designation of this standard.
(Changed edition, Rev. N 1, 3).
4.1.4. The box with the products to be tightly Packed in wooden boxes (type II-1) according to GOST 2991. The gross weight of the box should not be more than 50 kg.
4.1.5. Transport marking under GOST 14192 with the application of manipulation signs «Fragile. Care», «Protect from moisture».
4.1.6. Transportation of products is done in covered vehicles of all types in accordance with the rules of cargo transportation applicable to transportation of this species.
4.1.7. The products are stored in the manufacturer’s packaging indoor. The joint storage with chemically active substances is not allowed.
4.1.8. In the far North regions and equated areas packaging, transportation and storage — by GOST 15846.
4.2. Interchangeable product
4.2.1. Marking, packaging, transportation and storage — by GOST 19086.
4.1.4−4.2.1. (Changed edition, Rev. N 1).
