1, redness issues and anti-redness electrode. AVESTA Bison Green P5φ3.2 × 350 and φ4.0 × 400 stainless steel electrode, respectively, in the 110-120A and 150-160A I head about 50mm the drug skin redness cracking. P5-HX electrode φ4 × 450 or even 160-170A I head is not red, which is the best level of similar electrodes.
2, stomatal issues and anti-the stomata performance improve, and is generally believed that the stainless steel the stomata case hydrogen prone visible stomata hole, in the last paragraph of the post-weld or weld the front or multilayer welding. Abroad as long as the electrode is not damp or use by over 250 â„ƒ complex bake will not appear on the vents. Now vacuum packaging with aluminum foil plastic composite film can be avoided as long as the packaging prior to use complex drying processes directly, to avoid off the skin not dried out pores or baked trunk injury. Stainless steel electrode stomata by the steel core, raw materials and drying process fluctuations and domestic use more the sacrifice process performance, to ensure that no stomata production principles, resulting in domestic stainless steel electrode level and physical level.
3, the question of efficiency and efficient Welding Rod. Ordinary stainless steel electrode deposition efficiency is generally less than 110%, about 85%. Efficient stainless steel electrode is more than 140% up to 180%, a significantly shortened welding electrode construction time, it has the following characteristics: without redness without using large current can be as low carbon steel to improve work efficiency stomatal; small spatter, weld appearance, the possibility of overheating of the electrode covering, easy to operate, Japan Kobelco HIMELT series, AVESTA HX Series and ESAB's OK6X.41 series welding of large chemical equipment often require efficient, domestic is still blank, worth noting is efficient only suitable for flat welding and fillet welding stainless steel electrode.
4, carburizing series of problems and ultra-low carbon electrode, ultra-low carbon electrode is the focus of the stainless steel electrode development at home and abroad, must require ultra-low carbon weld drug skin does not increase carbon and ultra-low carbon welding core. Marble and rutile increase carbon source, should seek other effective way.
5, special welding rod.
a, with the high temperature corrosion resistance of the special welding (resistance to creep rupture strength and high elongation)
b, resistance to intergranular corrosion excellent and -196 â„ƒ impact toughness of high urea grade stainless steel electrode.
c cavitation-resistant surfacing of stainless steel electrode.
d poor welding chromium stainless steel special electrodes.
e stainless steel electrode resistance to moisture absorption.
f, the directed at weld dedicated stainless steel electrode such as AVESTAVDX330 PHILIPSBM316-V.
6, the electrode the operating process performance. Little difference in the intrinsic properties of stainless steel electrode, stainless steel electrode Comparison of major process performance is the welding operation, following several determine the level or standard.
a slag removal. Requirements in the T-joint fillet weld, butt angle the weld and boat welding Ying position off the slag net and flat welding, fillet welding position slag from Alice the entire fall off the edge and weld surface no sticky residue.
b, the splashing size. (Verylittlespatter) and no spatter (nospatter), can be divided into three levels AVESTA samples say little splash (litterspatterorusuallyspatter), spatter. Domestic majority at the first level, a few manufacturers at the second level, third level No no splash stainless steel electrode.
c, re-ignition, to claim drug skin sleeve dark straight type, depth of 3mm or more, re-ignition is extremely easy, and under normal conditions, without time interval limit.
d, all-position welding, 4mm or more large-sized all-position welding electrode is better
e, weld shape and color requirements weld forming fine beauty bright, in most cases, the weld color is silvery white or golden yellow.
Stainless steel electrode can be divided into chromium stainless steel welding rod and chrome-nickel Stainless Steel Electrodes, who meet the national standard, according the provisions of GB GB/T983-1995 assessment of these two types of electrodes. Chromium stainless steel some corrosion (oxidizing acids, organic acids, cavitation) heat resistance and corrosion resistance. Usually selected as power plants, chemical, petroleum and other equipment and materials. The general case of chromium stainless steel weldability poor, should pay attention to the welding process, heat treatment conditions and the appropriate choice of welding electrodes. Chrome-nickel stainless steel electrode has good corrosion resistance and oxidation resistance, widely used in chemical, fertilizer, petroleum, medical machinery manufacturing. Welding current should not be too large, in order to prevent the generated eye intergranular corrosion due to the heating, about 20% less than the carbon steel electrode, an arc is not too long, the interlayer fast cooling, preferably with narrow weld.