SU1569148A1 - Method of mechanical tests of corner welds - Google Patents

Abstract

The invention relates to welding, in particular to methods for comparative mechanical testing of frontal and flanking welded joints, and can be used in various fields of science and technology in the design, manufacture and strength tests of various welded structures. The purpose of the invention is to increase the reliability of the test results. Plate 1 is welded to the overlay 2 with an angle seam 3. The resulting welded structure is cut into individual identical elements from which the test pieces are made. Samples with frontal seams are obtained by connecting two elements along the free surfaces of the plates and, when tested, are loaded with transverse force. Samples with flanking seams are obtained by connecting two elements along the free surfaces of the plates and, when tested, are loaded with longitudinal force. 3 il. 1 tab.

Description

1

The invention relates to welding, in particular to methods for comparative mechanical testing of frontal and flanking welded joints, and can be used in various fields of science and technology in the design, manufacture and strength testing of various welded structures.

The purpose of the invention is to increase the validity of the test results.

 FIG. 1 shows an element cut from a welded joint; in fig. 2 is a test pattern of a sample with front seams; in fig. 3 - the same, with flanking seams.

The method is implemented as follows.

A plate 2 is installed on the plate 1 and they are welded with an angle seam 3, after which the resulting welded structure is cut into individual elements (Fig. 1) with a length of 1 Ш 5КШ, where is the leg of the seam

From the obtained elements, specimens were made for testing frontal (figs2) and flanking (fig.Z) welds.

Samples with frontal seams are made by joining two elements along free surfaces ABCD and A B C D plates 1 "The plates 2 are oriented in the same direction. The sample is loaded with a transverse force k.

Samples with flanged seams are made by connecting two elements along free surfaces KLMN and K L M N of the plates 2. The plates 1 are oriented in opposite directions. Samples are loaded with longitudinal force.

Example. Samples of steel 20 are fabricated, for which purpose a welded structure is used from a plate and a lining, the thickness of which is 12 mm, width 50 mm, length 800 mm. The plate and the lining are welded with a gap of 1 mm with an angle shaft with a leg Ksh 5 mm, mechanized welding in a medium CO., Filler wire SV08G2S, 012mm on modes I 180 A, UC6 28 V, 25 m / h. The resulting compound is cut across the seam into equal elements (FIG. 1).

Samples for testing the front seam are formed by a symmetrical connection of two equal elements by the bases of the plates (Fig. 2). Samples for testing the flank seam form pu

for the symmetric connection of two equal elements by the bases of the plates 2 with the rotation of one element relative to the other by 180 ° (FIG. 3).

Manufactured samples are tested by applying a compressive load 4 (FIGS. 2 and 3). The average arithmetic values of the strength and ductility of the joints obtained during the tests are given in Table. one.

Table 1

with about

five

0

The proposed method allows to completely eliminate one of the important ones. the order of occurrence of the error when comparing the mechanical characteristics of the frontal and flanking seams, namely the difference in thermal deformation cycles (TDC) when welding samples with frontal and flanking seams.

Thus, by cutting elements for forming samples with frontal and flanking seams from the same and the same seam, the proposed method eliminates differences in thermodeformational cycles of formation of the tested seams, as a result of which differences in the mechanical properties of the seam metal are reduced, reducing the reliability of strength and ductility of welded joints with fillet welds. In addition, the proposed method for the manufacture of samples makes it possible to significantly reduce the metal intensity of the samples by changing the design of the sample and the complexity of its production. It is also possible to manufacture samples from welded joints of real structures,

invention formula

The method of mechanical testing of welded fillet welds, in which the plate is assembled overlap with the overlay, is welded to each other with a fillet weld, make samples for mechanical testing of frontal and flange-1

Claims (1)

Claim A method of mechanical testing of welded fillet welds, in which the plate is lapped with a lining, welded together with a fillet weld, samples are made for mechanical testing of the frontal and flange55 t joints and carry out their mechanical tests by applying loads respectively across and along the joint. characterized in that, in order to increase the reliability of the test results, the welded joint is cut across into separate elements, samples for testing frontal joints are made by connecting two 1569148 6 plates with the orientation of the plates of both elements in one direction, and samples for testing flank joints - by connecting two elements on the free surfaces of the plates with the plates oriented in opposite directions, and for the manufacture of samples of both frontal and flank joints, their elements are cut from one of the same Fig.Z