SU701751A1 - Electrodes for welding b-4 cast iron - Google Patents

Description

(54) ELECTRODE FOR WELDING IRON

one

The invention relates to the field of welding technology and can be used for manual arc welding of bleached (white) cast iron with low carbon steel in engineering, agriculture in the manufacture and repair of cast iron products.

A known electrode for welding cast iron with a coating containing cellulose, marble, ferroalloys, metal powder, water glass 1.

After welding with such an electrode, the weld metal may have cracks, pores.

The proposed electrode differs from that in order to improve the quality of the weld metal, 16-20% talcum, 7-1 I / o potassium nitrate, and the remaining components of the electrode coating are taken in the following percentage to the weight of the charge: cellulose or starch 0.2-1.0; marble 42-46; ferromanganese 13-17, iron powder 10-14, liquid glass 40-50.

Talc makes plastering of the electrode coating plastic.

Kaliyev saltpeter prevents the formation of tepl1in in the weld metal when welding cast iron. Pokryggye applied to the steel rod brand SV-08. CB-08A.

Seam metal, B:; o. The proposed electrode is plastic (bending angle 104) and does not have a thrash.

Welding was carried out, the feathers of which were made of pig iron, and the pipe was made of mild steel.

Welding was carried out with a continuous seam on both sides of the pen with an electric electrode (05mm. Current strength 250A). The length of the weld on one side of the feather was about 3000 mm, no cracks were found anywhere.

The chemical composition of the weld metal, weight. %: carbon 0.04; silicon 0.038, manganese 0.3. phosphorus 0.01, sulfur 0.011, nitrogen 0.04.

When welding bleached cast iron with steel, the following structure is obtained;

Transition zone;

a) from the side of mild steel perlite and ferrig; the inclusion of cementite (point), as the depth of the ferrite decreases in the weld metal, -. / ", .FW751

from, according to N.shets, needle cementite and sorbitol-like perlite;

61 on the side of bleached cast iron I14) latchat cementite and sorbitol-like nerlite.

11ap.; | Avlenny metal:

perlite and cementite on the grain boundary.

After welding with the proposed electrodes, gray cast iron is treated with cutting tools and tools.

Claims (1)

Invention Formula Electrode for welding cast iron, miiii of steel rod and electrode coating containing cellulose, marble, ferroalloys, metal and powder, water glass, characterized in that four improving the quality of the weld metal; talc was introduced into the composition of the electrode coating in the amount of 16-20%: potassium nitrate in the amount of 7-11%; the remaining components are taken in the following percentage of the weight of the charge: Cellulose or starch 0.2-1 Marble42-46 Ferromanganese (in as a ferroalloy) 13-17 Iron powder (metal powder) 10-14 Liquid glass 40-50 Sources of information taken into account during the examination 1. USSR Author's Certificate No. 248866, cl. 23 K 35/36, 1963.