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New Hybrid Molybdenum Powder Used For TZM Alloy Manufacturing

In industry, manufacturers usually add alloy elements and carbon for TZM alloy manufacturing. However, this method has its shortcomings, which is prone to melting and segregation during melting, to form grain boundary segregation, so alloy‘s fragility and recrystallization temperature will increase. Especially in the case of Ti presence in the alloy, due to Ti high vapor pressure, making it difficult to control the final content in the alloy, so the producer usually only by virtue of the adjustment smelting parameters and alloying elements doped quantity.

The new hybrid molybdenum powder is conductive to produce powder mixture in metallurgy technique or it can adjust alloy’s structure during production, so it is possible to reduce the brittleness of the alloy. Using impregnation and carbon nitride, with the corresponding method of sintering and smelting process, and can be produced TZM alloy having a low N2 content.

Using new hybrid molybdenum powder for TZM alloy manicuring:
1. A certain percentage of TiC, TiN and ZrN is added to TZM powder mixture, and using the mill to grind them into powder particles less than 5um.
2. In the mixer, 31% TiC, 48% TiN, 14% ZrN and 7% of fine carbon black is prepared a premix. Then 15% premix and 85% MoMP is slowly added to the mixer, mixed for one hour to prepare a mixture. The mixture is used as the parent group for the final 1:20 of TZM powder mixture production.
3. 5% mixture and 95% MoMP was placed in a mixer and mixed for 15 minutes, then after -150um sieved to obtain new hybrid molybdenum powder for TZM alloy manufaturing.
4. Using powder metallurgy method produce sintered blank, then after subsequent processing to produce TZM alloy.

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