GOST 26719-85
GOST 26719−85 antifriction powder Materials based on copper. Stamps (Change No. 1)
GOST 26719−85
Group 56
STATE STANDARD СОЮ3А SSR
ANTIFRICTION POWDER MATERIALS BASED ON COPPER
Brand
Copper-based powder antifriction materials. Types
AXTU 1790
Valid from 01.01.87
before 01.01.92*
_______________________________
* Expiration removed
by the decree of Gosstandart of the USSR
from
Note the manufacturer’s database.
DEVELOPED by the Institute of materials science problems, Ukrainian Academy of Sciences
PERFORMERS
V. N. Klimenko, I. M. Fedorchenko, L. I. Pugina, A. E. Kushchevsky, M. Simonovic, A. T. Pekarík, L. D. Bernatsky
INTRODUCED by the Academy of Sciences of the Ukrainian SSR
Vice-President of the Academy of Sciences of Ukraine I. K. pokhodnya
APPROVED AND put INTO EFFECT by Decision of the USSR State Committee on standards of 19 December 1985, N 4235
The Change N 1, approved and put into effect by the Decree of Gosstandart of the USSR from
Change No. 1 made by the manufacturer of the database in the text IUS N 3, 1990
1. This standard applies to antifriction powder materials based on copper, designed for parts of friction units of machines and mechanisms.
The standard corresponds to the international standard ISO 5755/1 in part brands PA-Man, PA-Bragr, PA-БрОГр2.
2. Brand chemical composition and physico-mechanical properties of antifriction powder materials based on copper shall be as given in the table.
| Mark |
Mass fraction of elements, % | Physico-mechanical properties | Tensile strength in radial compression | |||||||
| Copper |
Tin |
Carbon |
Same- the Uragan |
Nickel |
Chrome |
Porosity, % |
Hardness HB, MPa, not less |
Microstructure | ||
| PA-Bro |
OS- Nova |
For 9.5−10.5 |
to 0.25 |
- |
- |
- |
18−27 |
350 |
Homogeneous |
140 180 (with porosity less than 22%) |
| PA-Progr |
« | For 9.5−10.5 |
0,5−1,0 |
- |
- |
- |
15−28 |
250 |
The same graphite | 120 160 (with a porosity of less than 22%) |
| PA-БрОГр2 |
« | 9,0−11,0 |
1,5−2,5 |
- |
- |
- |
15−25 |
250 |
« | 120 160 (with a porosity of less than 22%) |
| PA-БрОГр4 |
« | 9,0−11,0 |
3,0−4,5 |
- |
- |
- |
10−25 |
200 |
« | 110 |
| PA-Progr |
« | 7,5−8,5 |
0,5−1,0 |
19−21 |
- |
- |
18−28 |
200 |
Solid solutions of tin and iron in copper, the inclusion of phases based on iron, graphite, pores | 130 |
| PA. |
« | 4.5 to 5.5 |
- |
- |
- |
For 9.5−10.5 |
4−20 |
800 |
Homogeneous |
350 |
| PA-Brohn |
« | 4.5 to 5.5 |
- |
- |
6,5−7,5 |
For 9.5−10.5 |
4−20 |
900 |
A homogeneous solid solution of Cu, Ni and Cr in copper with inclusions chromadorida phases and compounds Ni |
400 |
| PA-ДГр10 |
« | - |
9,0−11,0 |
- |
- |
- |
2−9 |
200 |
Copper matrix with evenly distributed inclusions of graphite, the pores |
45 |
Notes:
1. The index of tensile strength in radial compression
2. The minimum acceptable hardness value of the material items (
where is the minimum value of the hardness according to the table, MPa;
— a correction factor characterizing the variation of hardness and porosity of the material. For materials brands PA-Man, PA-Bragr, PA-БрОГр2, PA-БрОГр4 and PA-Bloggr it should be 12.3; 8,3; 25,0; of 26.7 and 16.6, respectively;
— the maximum value of the porosity of the material according to the table, %;
the maximum porosity value for a prescribed interval porosity of the material in the normative-technical documentation for specific products, %.
1, 2. (Changed edition, Rev. N 1).
3. The limit of Flexural strength, the tensile strength tensile and toughness of the antifriction powder materials based on copper in the reference Appendix 1.
4. Conditions of work and the scope of the materials is given in recommended Appendix 2.
5. Compliance notation antifriction powder materials based on copper previously used in the normative-technical documentation in the reference enclosure 3.
6. The symbol marks consists of letters and numbers. The letters indicate: P — belonging to the powder material, And assign material — antifriction, after the dash — based material and alloying elements: Br — bronze, D — copper, tin, Gr — graphite, W — iron, X — chrome.
The figures after the letters indicate the content of a particular element in materials of similar compositions, different percentages of the same elements.
Example of designation antifriction powder material based on copper, alloyed with tin and graphite GOST 26719−85
PA-БрОГр2 GOST 26719−85
7. Control methods
7.1. The porosity is determined according to GOST 18898−89.
7.2. The hardness is determined according to GOST 25698−83*.
_________________
* On the territory of the Russian Federation GOST 25698−98. — Note the manufacturer’s database.
7.3. Tensile strength in radial compression is determined according to GOST 26529−85.
7.4. The tensile bending strength is determined according to GOST 18228−85*.
_________________
* On the territory of the Russian Federation GOST 18228−94. — Note the manufacturer’s database.
7.5. Ultimate resistance in tension is determined according to GOST 18227−85*.
_________________
* On the territory of the Russian Federation GOST 18227−98. — Note the manufacturer’s database.
7.6. Impact strength is determined according to GOST 26528−85*".
_________________
* On the territory of the Russian Federation GOST 26528−98. — Note the manufacturer’s database.
6−7.6. (Added, Rev. N 1).
ANNEX 1
Reference
| Material grade |
Tensile strength at bending, MPa |
Yield strength tensile, MPa |
Impact strength, kJ/m |
| Not less than | |||
| PA-Bro |
100 |
60,0 |
13,0 |
| PA-Progr |
- |
78,5 |
- |
| PA-БрОГр2 |
- |
70,0 |
- |
| PA-БрОГр4 |
- |
60,0 |
- |
| PA-Progr |
- |
78,5 |
- |
| PA. |
390 |
176,0 |
2,0 |
| PA-Brohn |
430 |
215,0 |
2,0 |
| PA-ДГр10 |
50 |
- |
8,0 |
APPENDIX 2 (recommended)
ANNEX 2
Recommended
| Mark |
Working conditions |
Scope |
| PA-Bro |
Under oil lubrication the allowed pressure up to 5 MPa at a sliding speed of 2 m/s With oil lubrication and self-lubrication allowable pressure up to 1.9 MPa at a sliding speed of 1.5 m/s in the temperature range from minus 60 to +120 °C. Not require additional lubrication for 3−5 thousand hours, have a low and stable coefficient of friction (0,01−0,04), low noise |
The bearings are friction devices of magnetic recording and playback, compact gearboxes, motors, acoustic devices, machines for processing of food products, household appliances, textile machinery, etc. are Used to replace rolling bearings, cast alloys based on nonferrous metals (bronze, babbit, etc.) |
| PA-Bragr, PA-БрОГр2, PA-БрОГр4, PA-Progr |
Under oil lubrication the allowed pressure up to 6 MPa at a sliding speed of 2 m/s In the mode of self-lubrication the allowed pressure up to 3 MPa at a sliding speed of 1−2 m/s, have a coefficient of friction of 0.03−0.06, low wear, silent in operation |
Bearings friction units of sewing machines, equipment and appliances home appliances, juicers, hair dryers, tape recorders, electric motors of low power, pipelines, calculating and computing machines, boards small-size gearboxes, of cars, tractors, motorcycles, etc. Replace tin cast bronze, brass, bearings |
| PA-Broch, PA-Brohn |
Designed to work in the conditions of lubrication under medium to heavy loads (7−10 MPa), with a slight sliding velocities (about 1 m/s). Can be subjected to heat treatment (quenching, aging), increase their physical and mechanical properties. Coefficient of friction lubricant to 0.1, without lubrication up to 0.7 |
The friction components for engineering, automobile building, instrument-making, hydraulic pumps, shipbuilding, etc., replace the babbit, cast bronze type brands Бр05Ц5С5; Бр012; Бр030; Brazh9−4; Brazhmc10−3-1,5, etc. |
| PA-ДГр10 |
Designed for operation without lubrication at high sliding velocities (up to 50 m/s), in the presence of the active liquid and gaseous media |
The friction of the pumps, instrumentation and other mechanisms, the mechanical seal rotating shafts |
ANNEX 3 (informative)
APPENDIX 3
Reference
| Designation according to GOST 26719−85 |
The previously used notation in NTD |
| PA-Bro |
БрО10 |
| PA-Progr |
Бр90−010Гр0,5−66; Бр90−010Гр0,5−74 |
| PA-БрОГр2 |
БрОГр7−2, БрОГр10−2; Д010Гр2 |
| PA-БрОГр4 |
БГр4А; БГр4; AMK-1; БрОГр10−4; БрО10Гр3; БрОГр9−3; БрОГр10−3 |
| PA-Progr |
Бр72Ж2008Гр0,5−65; Бр72Ж2008Гр0,5−69 |
| PA. |
БрОХ5−10 |
| PA-Brohn |
БрОХН5−10−7 |
| PA-ДГр10 |
MG-10; DGR-10 |
