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Question:

What kind of etching solution should be used for metallographic observation of MIG and TIG welding of cobalt based carbide and medium low carbon steel? Ten

MIG and TIG welding of cobalt base carbide and medium low carbon steel, respectively, using copper wire and stainless steel wire. What kind of corrosive liquid should be used in the welding seam to be metallographic?MIG+ copper welding wire, MIG+ stainless steel wire, TIG+ stainless steel wire

Answer:

Cobalt based alloys are cobalt, which contains a considerable amount of nickel, chromium, tungsten, and a small amount of alloying elements such as molybdenum, niobium, tantalum, titanium and lanthanum, and occasionally contains an alloy of iron. According to the alloy composition is different, they can be made of wire for hardfacing powder, thermal spraying, spray welding process, can also be made of casting and forging and powder metallurgy.
According to the usage, the cobalt based alloy can be divided into cobalt base alloy wear, high temperature resistant cobalt and cobalt base alloy abrasion and corrosion of the alloy in aqueous solution. The general condition is both wear resistant or wear resistant and corrosion resistant performance, some conditions may also require high temperature wear resistance and corrosion resistance, and more in this complex condition, the more it can reflect the advantage of cobalt base alloy.
Cobalt based alloy is a cemented carbide that is capable of various types of wear and corrosion as well as high temperature oxidation. Commonly known as the cobalt chromium tungsten (molybdenum) alloy or Si Taili (Stellite) alloy (Si Taili alloy invented by the American Elwood Hayness in 1907).

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