Characteristics; has good resistance to abrasive wear, impact resistance, wear resistance, adhesion wear (metal abrasion), high temperature wear, corrosion resistance, abrasion resistance and anti-two types of composite wear performance. Welding Wireclassification; 1) according to their chemical composition classification can be divided into two categories; iron-based surfacing wear-resistant wire and non-ferrous base wear-resistant surfacing wire. Each category according to their characteristics of chemical composition or microstructure, is divided into several subclasses. Surfacing wear-resistant iron-based surfacing wear-resistant wire can be divided into surfacing wear-resistant high-chromium Nickel Alloy Welding Wire, tungsten carbide surfacing wear-resistant wire, non-ferrous wire can be divided into the cobalt-based hardfacing wear wire and nickel-based Wire Surfacing wear. 2) Press the wire structure can be divided into solid wires and cored (also known as tubular) wire. 3) according to the welding processes can be divided into gas shielded welding, submerged arc welding, flame surfacing, plasma welding and spraying (welding) wear-resistant surfacing wire.
Segregation in the welds of the following three: â‘´ microsegregation bath crystallization time, the central metal of the first crystallization of the crystallization of the most pure, the part after crystallization with other alloying elements and impurities slightly higher, part of the final crystallization, ie, crystallization of the outer end and the leading edge of the other alloying elements contained in impurities in the highest. A columnar grain interior and grain chemical composition of the uneven distribution of the phenomenon known as microsegregation. â‘µ regional segregation bath once crystallization, due to the columnar crystals continue to grow and goes on, will impurities "rush" to Types Of Welding Electrode, more than other parts of the impurity content of the bath centers, a phenomenon referred to as regional segregation. The weld cross-section shape of the distribution of regional segregation. Narrow and deep welds, the junction of columnar crystals in the center of the weld, the weld center gathered more impurities. This weld hot cracking in its central parts easily. Wide and shallow weld impurities gathered in the weld the upper part of Welding Material has a high resistance to thermal crack. â‘¶ layered segregation bath in a crystallization process, to continue to release latent heat of crystallization, when the latent heat of crystallization reaches a certain value, the crystallization of molten pool on a temporary pause. After the heat with the bath, crystallization again began to form a periodic crystalline, accompanied by periodic changes in the concentration of impurities in the crystalline forefront of liquid metal, resulting in periodic segregation known as layered segregation. Layered segregation concentration of some harmful elements, defects often appear in the layered segregation. Pores caused by the layered segregation.