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Molybdenum zirconium lead carbon alloy

  • Mosten
  • 3 Aug

Molybdenum-zirconium lead-carbon alloy (ZHM alloy) An alloy consisting of molybdenum as the matrix element and the alloying elements zirconium, hafnium and carbon. A typical molybdenum alloy is ZHM molybdenum alloy containing 0.4%~0.7% zirconium (mass fraction), 1.2%~2.1% hafnium (mass fraction), and 0.15%~0.27% carbon (mass fraction). The ZHM alloy is strengthened by adding Hf instead of Ti by forming biphasic structure. ZHM alloy has better properties than MHC. The properties of alloys are closely related to the degree of deformation and heat treatment conditions.

Molybdenum-zirconium lead-carbon alloy A molybdenum alloy consisting of high amounts of zirconium, hafnium, and carbon and molybdenum. The mass percentage of each component is 0.4~0.7 zirconium, 1.2~2.1 hafnium, 0.15~0.27 carbon. A new molybdenum alloy, labeled as ZHM molybdenum alloy. Their room temperature tensile strength is about 40%~50% higher than TZM molybdenum alloy, which is the highest strength molybdenum alloy. Ingot sintered by powder metallurgy is forged at 1200℃, with a deformation of 50%~75% or higher, and annealed by hydrogen at 8H1200 ℃ in the middle. Different processing and heat treatment have great influence on the final properties of alloys. This alloy is still in the development stage, mainly processed from ingot into disc, as an isothermal forging die for powder superalloy.

The ZHM alloy is strengthened by adding Hf instead of Ti by forming biphasic structure. ZHM alloy has better properties than MHC. The properties of alloys are closely related to the degree of deformation and heat treatment conditions. For example, in MHC system, Mo-1Hf-0.05C alloy, made of powder metallurgy spindle, when the forging deformation reaches 60%, the tensile strength is 20% higher than TZM at 950~1250℃, and the elongation in all directions is 1%~10%.

ZHM4 (Mo-1.2Hf-0.4Zr-0.15C) was found in the ZHM system. ZHM6 (Mo-1.5Hf-0.5Zr-0.19C); ZHM7 (Mo-1.8Hf-0.6Zr-0.23C); ZHM8 (Mo-2.1Hf-0.7Zr-0.27C) alloy with four components. These alloys have excellent machining properties, good high temperature strength and low temperature ductility.

Molybdenum zirconium lead carbon alloy has excellent machining properties, good high temperature strength and low temperature ductility. The room temperature tensile strength of molybdenum zirconium hafnium alloy is about 40% ~ 50% higher than that of TZM molybdenum alloy, which is the highest strength molybdenum alloy. In general, ZHM alloy mainly has the characteristics of high density, high melting point, high boiling point, strong hardness, good thermal conductivity and large elongation. ZHM alloy is still in the research stage, mainly used in the construction of steel ingot and as a cold isostatic die, and may be used as a super alloy in the future.