Molybdenum alloy development history as follows:
Since 1778, molybdenum was discovered since been widely used in metallurgy, electric light, electronic industry, chemical industry, glass and glass fiber industry medical industry and so on. However, due to the performance of its own defects (such as plastic - brittle transition temperature lower than the hardness, strength and limited) people try to use it to promote a variety of ways to improve it embarked on the road of molybdenum alloying.
First, there is added to a small amount of molybdenum, titanium, zirconium and other trace elements form a molybdenum alloy, molybdenum alloy (such as Mo-0.5Ti, Z-6, etc.) in order to remove solid-solution strengthening by the trace grain boundary embrittlement phase which reactant (TiC, ZrC) as a dispersion, with the strengthening effect of Mo alloys play, to improve its performance objective.
While the molybdenum and tungsten rhenium metal is made by a certain percentage corresponding mating molybdenum alloy (such as Mo-5Re, Mo-25W, etc.) through a large number of solid solution Mo alloyed improve its heat intensity to form a molybdenum rhenium tungsten and molybdenum trace amounts of molybdenum in molybdenum alloy series alloyed molybdenum alloy, based on a certain amount of molybdenum alloying elements molybdenum alloy high temperature can improve the ductility at room temperature after use and the development of Mo-Ti-Zr-C Series molybdenum alloys in this series TZM, TZC molybdenum alloys have become the most used by people molybdenum alloy molybdenum alloys are a very important part of the family.
In recent years, it has been found to add elements hafnium substituting titanium as its reaction with TiC HfC stronger than strengthening effect can be further improved molybdenum alloys also established on the basis of a Mo-Hf-C system (MHC) and Mo-Hf-Zr-C system (ZHM) series molybdenum alloy. Meanwhile, someone is trying to trace the solid solution strengthening effect of dispersion of molybdenum and tungsten and molybdenum alloy solid solution strengthening effect of a large molybdenum alloying combined overall performance in order to molybdenum alloy fundamental breakthroughs, which in turn leads to the Mo-W-Zr-Hf -C system and the Mo-W-Hf-C series molybdenum alloy.
Is still in the development stage of wet adding potassium doped molybdenum, silicon, aluminum and other trace elements are formed by doping the reported high molybdenum best performance of a molybdenum alloy, the recrystallization temperature of up to 1800, even after recrystallization still has some strength, ductility and broad prospects for development. While adding the metal rhenium doped molybdenum alloy obtained a more favorable overall performance molybdenum alloy species present in pure molybdenum and molybdenum alloys of various types have been reported in rare-earth oxides have also become more mature several molybdenum alloy grades so far molybdenum alloy has formed a complex evolution chart.
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