COATING TYPE - Basic
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Э – 30Г2ХМ НР-70 Плазма – Ø – НД Е 350/39-1 – Б 40 |
ГОСТ 9466-75, ГОСТ 10051-75 |
- metal deposited by electrodes has good wear resistance and satisfactory impact resistance;
- the stability of the properties is achieved by observing constant surfacing conditions;
- surfacing coefficient: 0.15...0.16 g/A·min;
- consumption of electrodes per 1 kg of deposited metal: 1.5...1.6 kg.
PURPOSE AND FIELD OF APPLICATION
Electrodes НР-70 Plasma are designed for welding of parts operating under conditions of intense impact load and metal-to-metal friction (wear of railway crossings, ends of rails, auto couplings, axles, shafts).
APPLICATION CONDITIONS
- before surfacing, it is necessary to clean the welded part from dirt, rust, oil;
- it is not recommended (in order to avoid cracking) to weld steel parts in more than two layers, cast iron parts - in one layer;
- in case of heavy wear of the part, the lower layers should be welded with other electrodes, the choice of which depends on the composition of the base metal;
- for carbon low-alloyed steels, the previous layer can be welded with Monolith RC, АНО-36 electrodes, for manganese-alloyed steels, with UONY 13/55 Plasma electrodes.
REDRYING BEFORE WELDING
- permissible moisture content in the coating before use is no more than 0.4%;
- in case of wetting of the electrode coating above the norm - dry for 60 minutes at 250±20°C.
CHEMICAL COMPOSITION OF DEPOSITED METAL, %
| Mn | Si | C | P |
| 1,5…2,0 | ≤ 0,15 | 0,22…0,38 | ≤ 0,040 |
| Cr | S | Mo |
| 0,5…1,0 | ≤ 0,030 | 0,3…0,7 |
MECHANICAL PROPERTIES OF WELD METAL
| Hardness of the welded seam metal, HRC |
| 32,5…42,5 |
Welding should be carried out with a direct current of reverse polarity, "+" on the electrode with an arc voltage of 23...27 V.
PACKAGING DATA
| Diameter, mm | Length, mm | Welding current, A | Units per package, pcs | Weight of packing, kg |
| 3,0 | 350 | 100…140 | 33…35 | 1,0 |
| 4,0 | 450 | 130…180 | 15…17 | 1,0 |
WELDING POSITIONS
ISO 6947
