GOST 23046-78

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  ГОСТ 23046-78

GOST 23046−78 Connections soldered. Test method for impact (Change No. 1)

GOST 23046−78

Group B09

STATE STANDARD OF THE USSR

CONNECTION BRAZED

Test method for impact

Brazing and soldering joints.
Method of impact tests

AXTU 0072*
______________
* Introduced advanced Edit. N 1.

Valid from 01.07.1979
prior to 01.07.1984*
_______________________________
* Expiration removed
by the decree of Gosstandart of the USSR
from 13.12.88 N 4051 (IUS N 3, 1989). -
Note the manufacturer’s database.

DEVELOPED by the State standards Committee of the USSR Council of Ministers*

The Ministry of higher and secondary special education of the USSR*

PERFORMERS*

Dr. Techn. Sciences, Professor S. V. Lasko, PhD. tech. Sciences N. Sirchenko, d-R tekhn. Sciences, Professor V. A. Vinokurov (leader), N. Lebedev, V. P. Il’in*

SUBMITTED by the State standards Committee of the USSR Council of Ministers*

Member Of The State Committee For Standardization N.P.Frost*

APPROVED AND promulgated by the Decree of the State Committee of standards of the USSR Council of Ministers dated March 31, 1978 N 913*
________________
* Information given from the official publication, Moscow: Publishing house of standards, 1978. — Note the manufacturer’s database.

REPRINTING. June 1979

The Change N 1, approved and put into effect by the Decree of the USSR State Committee for standards from 17.12.83 N 6195 from 01.01.85

Change No. 1 made by the manufacturer of the database in the text IUS N 3, 1984


This standard applies to solder joints of metals and alloys that are subjected to shock loads, and establishes a test method to determine the relative work of destruction.

The test is performed to determine the quality of solder joints, suitability, methods, modes and materials used in soldering.

1. SAMPLE REQUIREMENTS*

____________
* The name of the section. Changed the wording, Rev. N 1.

1.1. For testing the impact strength used samples of types I-III, drop cut — type IV.

1.2. The shape and dimensions of samples for testing shall be as specified in the hell.1−4.

Type I

________________
* Size for reference.

1 — strip. The thickness of the brazed material 3−6 mm. overlap Width . .

Damn.1

Type II

Note. The choice of the type of hub — according to GOST 9454−78.

Damn.2


Type III

and

8−10 mm.

b

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Type IV

________________
* Size for reference.

Sample thickness of 8−10 mm.

where  — thickness of the solder joint.

Damn.4

(Changed edition, Rev. N 1).

2. PREPARATION FOR TESTING

2.1. Samples for testing must be made from welded for this purpose, blanks or controlled connection.

2.2. It is recommended to take the length of the workpiece that allows cut at least five samples of type I-III.

2.3. The cutting blanks for the samples are required to produce in a mechanical way. Permitted to use other cutting methods, this should be provided allowance for removal of HAZ or peening.

2.4. When soldering of workpieces grade brazed material, surface preparation, solder, or flux environment, the gap between the brazed workpieces, the method and mode of soldering needs to be the same as in the developed technological process.

2.5. The size of the gap during soldering is recommended to ensure by means of appropriate devices. Allowed to provide clearance using shims.

Strip recommended manufacturing of brazed material. Plot of the solder joint with pads should be removed in the process of making samples.

2.6. Edit and straightening brazed blanks are not allowed.

2.7. A cut on the solder samples shall be performed in accordance with the requirements of GOST 9454−78 (ST SEV 472−77, ST SEV 473−77).

2.8. Samples from the brazed workpieces or the monitored connection must be manufactured on machine tools or with anode-mechanical cutting. Burrs on the edges of the samples should be removed easy zapilovku with a radius of curvature less than 1 mm.

2.9. In the manufacture of samples of types I and IV should ensure that the radius of the fillets is not more than 0.3 mm. allowed machining of the throat.

2.10. Before testing should be measured with an accuracy of 0.1 mm length and width of the weld samples, soldered lap joint and a butt joint and a seam length of specimens soldered SCOs. The width of the bead samples, the solder SCOs, should be calculated by measuring the linear dimensions of samples, rounding the values to 0.1 mm.

According to the obtained results calculate the area of the solder joint, rounding value to 0.5 mm.

When calculating the area of the solder joint cross-section of the throat is not considered.

2.9, 2.10. (Changed edition, Rev. N 1).

2.11. Each sample should be marked where indicated on the devil.1−4.

3. REQUIREMENTS FOR EQUIPMENT AND APPARATUS FOR TESTING

3.1. Test brazed samples should be conducted on a pendulum coprah according to GOST 10708−82.

3.2. For testing brazed specimens of the type IV shock slicer knife pendulum replace the shock load, which is attached to the sample, and on the frame of copra establish special emphasis.

3.3. The shape and dimensions of supports shall be as specified in the hell.5.

3.4. Energy of a pendulum with a shock load must match the scale of copra at any value of the angle of rise of pendulum.

3.5. Attaching the solder specimen in the shock load should be established so that the shock pulse was directed along the tangent to the circle described by the center of percussion of the pendulum.

3.6. The distance from the axis of suspension of pendulum to centre of strike () are in millimeters calculated by the formula

,

where is the moment of inertia of the pendulum about the suspension axis, kg·mm;

 — the mass of pendulum, kg;

 — distance of center of mass of the pendulum from the axis of the suspension, mm, computed by the formula

,

where , …is the mass of the elements of the pendulum, kg;

, … — distance of the centers of masses of elements of the pendulum from the axis of the suspension, mm;

 — the number of elements of the pendulum

.

3.7. The shape and size of the shock load with a reserve of potential energy of 200 joules for copra МК30 and МК30А, 2010, KM-30, 2011 KM-30 reference is given in Annex 1.

3.8. Requirements for heating and cooling devices and equipment — according to GOST 9454−78.

Material — steel grade St 40.

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Section 3. (Changed edition, Rev. N 1).

4. TESTING

4.1. Testing brazed specimens for impact bending

4.1.1. Impact test bend should be performed on the samples of types I-III (see the devil.1−3) at a temperature of 20±5 °C or at temperatures from minus 100 to plus 1000 °C, in accordance with the requirements of technical documentation for the product.

4.1.2. The distance between the supports of pendulum during the test shall be 40±0,5 mm.

4.1.3. The procedure for testing the impact strength — according to GOST 9454−78.

(Changed edition, Rev. N 1).

4.1.4. The test specimens of type I is recommended with the pads, providing a brazed seam perpendicular to the plane of motion of the pendulum.

4.2. Testing brazed specimens for impact cut

4.2.1. Drop test cut should be performed on samples of type IV at a temperature of 20±5 °C or at temperatures from minus 100 to plus 20 °C, in accordance with the requirements of technical documentation for the product.

4.2.2. The distance between the supports of pendulum during the test shall be 45mm.

4.2.3. The sample should be introduced into the cavity of the shock load to align holes with a diameter of 18 mm in the sample and the walls of the shock load and secure it with the retainer. The firing pin must be entered in the outward opening of the sample and set on the tabs of the shock load. The shape and dimensions of the striker and the striker should match those in hell.6. Length of the striker — 40 mm, length of the firing pin is 90 mm.

Material — steel marks 35X, HRC 55−60.

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Note. Adjustment of the indicating mechanism copra should be carried out in accordance with the manual of copra prior to the installation of the striker.

4.2.4. When testing at low temperatures the samples before installation on the rig needs to be supercooled. The degree of hypothermia and the order of carrying out of tests according to GOST 9454−78.

Cooling of samples is necessary to conduct together with the latches and strikers.

(Changed edition, Rev. N 1).

4.2.5. Test brazed samples should be carried out with a single blow of the pendulum.

4.3. Tests should be not less than five samples. The volume of testing is recommended to determine GOST 25.503−80*.
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* On the territory of the Russian Federation GOST 25.503−97. Here and further. — Note the manufacturer’s database.

(Changed edition, Rev. N 1).

5. PROCESSING OF THE RESULTS

5.1. Relative work of fracture of a brazed sample () in j/mmis calculated by the formula

,

where  — operation impact expended in the destruction of the brazed sample, John.

 — the area of the solder joint before the test, mm.

The calculation is made with the error not more than 0.01 j/mm.

5.2. The operation of the blow expended in the destruction of the sample, measured on a scale graduated directly in joules.

The value is determined with error not more than 0.1 j.

5.3. The test result should be the arithmetic mean value in j/mm, calculated according to the formula

,

where , …is the relative work of fracture of each sample, j/mm;

 — arithmetic mean;

 — the number of samples tested.

5.4. If separate results are dramatically different from the calculated average value, it is recommended that the validation of the obtained results in accordance with Annex 1 to GOST 23047−78.

Statistical processing of results of tests recommended by GOST 25.503−80.

5.1−5.4. (Changed edition, Rev. N 1).

5.5. The number of samples for re-testing must match the number of samples, test results which are considered unreliable.

5.6. The test results of each sample should be recorded in the Protocol, the form of which is given in mandatory Appendix 2.

5.7. Not allowed to compare the test results of samples of different sizes.

ANNEX 1 (reference). Shock load with a reserve of potential energy of 200 j for the pendulum МК30А

ANNEX 1
Reference

Material — steel grade St 45.

The dimensions and clarifies the strap suspension of the pendulum.

(Changed edition, Rev. N 1).

ANNEX 2 (mandatory). Form of the test solder joints on impact

ANNEX 2
Mandatory

PROTOCOL N ___________

tests of the brazed specimens of the type __________________impact on the pendulum Koper___________

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* In «comments» indicate the character of fractures of samples, defects at the soldered seam and the heat affected zone, and so on.

(Changed edition, Rev. N 1).