A. TZM and TZC molybdenum alloy
TZM alloy containing 05% Ti, 0.08% Zr and 0.01% ~ 0.04% C of the molybdenum-based alloy, since the small amount of fine particles dispersed molybdenum additive to prevent grain growth at high temperature conditions, so that significantly improves the high temperature strength and anti-recrystallization temperature. TZC alloy is an alloying element content than high molybdenum alloy TZM alloy TZM Molybdenum target alloy is an improved varieties, it has good aging heat treatment hardening effect. However, due to the high cost of TZC alloy, processing difficulties, it is also not replace TZM alloy.
Compared with pure molybdenum, TZM (or TZC) alloy has a high recrystallization temperature and high temperature strength, it is often selected as TZM molybdenum alloy furnace molding tools and devices, such as supports, boat and tray. In the glass industry, TZM molybdenum alloy instead of pure carbon material, as in the manufacture of glass, the temperature> 1400 ℃, the active metal carbide does not decompose, thereby preventing bubble formation, improved glass quality, prolong the molybdenum electrode life. Furthermore, TZM alloy can be done and Ag-Cd alloy aluminum extrusion die, hot upsetting the anvil with the guide electrode, forging die and the nozzle and other materials.
Two. MHC and ZHM alloys
Is added instead of Ti, Hf tissue with the formation of two-phase approach to strengthen molybdenum alloy. ZHM has better performance than the MHC. Alloys and processing degree of deformation and heat treatment conditions have a great relationship. If MHC lines, Mo-1Hf-0.05C alloy powder made of a spindle, wrought reached 60% deformation, the temperature of 950 ~ 1250 ℃ TZM tensile strength ratio to be higher than 20%. the direction of the elongation rate of 1% to 10%.
ZHM lines have ZHM4 (Mo-1.2Hf-0.4Zr-0.15C); ZHM6 (Mo-1.5Hf-0.5Zr-0.19C); ZHM7 (Mo-1.8Hf-0.6Zr-0.23C); ZHM8 (M-2.1Hf-0.7Zr-0.27C) four ingredients alloys. These alloys have excellent processing properties, good high temperature strength and low temperature ductility.
A. TZM and TZC molybdenum alloy
TZM alloy containing 05% Ti, 0.08% Zr and 0.01% ~ 0.04% C of the molybdenum-based alloy, since the small amount of fine particles dispersed molybdenum additive to prevent grain growth at high temperature conditions, so that significantly improves the high temperature strength and anti-recrystallization temperature. TZC alloy is an alloying element content than high molybdenum alloy TZM alloy TZM molybdenum alloy is an improved varieties, it has good aging heat treatment hardening effect. However, due to the high cost of TZC alloy, processing difficulties, it is also not replace TZM alloy.
Compared with pure molybdenum, TZM (or TZC) alloy has a high recrystallization temperature and high temperature strength, it is often selected as TZM molybdenum alloy furnace molding tools and devices, such as supports, boat and tray. In the glass industry, TZM molybdenum alloy instead of pure carbon material, as in the manufacture of glass, the temperature> 1400 ℃, the active metal carbide does not decompose, thereby preventing bubble formation, improved glass quality, prolong the molybdenum electrode life. Furthermore, TZM alloy can be done and Ag-Cd alloy aluminum extrusion die, hot upsetting the anvil with the guide electrode, forging die and the nozzle and other materials.
Two. MHC and ZHM alloys
Is added instead of Ti, Hf tissue with the formation of two-phase approach to strengthen molybdenum alloy. ZHM has better performance than the MHC. Alloys and processing degree of deformation and heat treatment conditions have a great relationship. If MHC lines, Mo-1Hf-0.05C alloy powder made of a spindle, wrought reached 60% deformation, the temperature of 950 ~ 1250 ℃ TZM tensile strength ratio to be higher than 20%. the direction of the elongation rate of 1% to 10%.
ZHM lines have ZHM4 (Mo-1.2Hf-0.4Zr-0.15C); ZHM6 (Mo-1.5Hf-0.5Zr-0.19C); ZHM7 (Mo-1.8Hf-0.6Zr-0.23C); ZHM8 (M-2.1Hf-0.7Zr-0.27C) four ingredients alloys. These alloys have excellent processing properties, good high temperature strength and low temperature ductility.
Molybdenum carbide has a high melting point and hardness, good thermal stability and mechanical stability, and excellent corrosion resistance and other characteristics. Molybdenum is a silvery white refractory metal, a melting point of 2615 ℃, density of 10.2 g / cm 3, the expansion coefficient is small, a special tube is almost the same coefficient of expansion of the glass. Molybdenum stable at room temperature is higher than 600 ℃, rapidly oxidized.
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