Carbon percentage continues to increase, the base of markov restructuring into high carbon martensite, at the same time, in the majority with chromium molybdenum M7C3 type combination of cementite in twin fishbone shaped, so, high flexibility, low carbon martensite plus herringbone M7C3 type combination of cementite on the substrate distortion effect, falling oil casing manufacturers that high vanadium alloy steel flexibility, Cooccurrence is easy to occur at M7C3 binding cementite. In other words, the occurrence of M7C3 binding cementation, which is dominated by chromium key, is bad for the impact damage characteristics of high vanadium alloy steel.
In conclusion, in order to obtain high vanadium alloy steel with good wear resistance, the carbon proportion must be controlled in an appropriate range.