TZM (Ti-Zr-Mo) Alloy Oxidation Resistance
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- Category: Molybdenum knowledge
- Published on 28 September 2014
- Written by jwy
- Hits: 607
TZM (Ti-Zr-Mo) alloy is a kind of high temperature molybdenum alloy with high melting point, corrosion resistance, mechanical properties, which are widely used in military-industrial complex, aerospace and high temperature structure, etc.
Due to the high temperature performance, TZM alloy widely used as high-temperature structural parts, but its oxidation resistance is not very good, can not be generated to protect their anti-oxidation layer, greatly reducing the life and scope of the alloy. With the improvement of oxidation resistance, most foreign TZM alloy as heat panels use high oxidation resistance of the alloy requirements. There are two kinds of methods to improve the antioxidant properties of the alloy, one is alloying, adding trace elements in the alloy to improve the oxidation resistance of the alloy.
Second, surface coating technology, the surface is a protective layer on the surface of alloy plating, but the oxidation resistance of alloying method under the high temperature is not strong, so most of them are used in protection coating, the coating process of vegetation, the embedding method has low cost, and easy to control, as well as is widely used the characteristics of the substrate and coating binding force strong and attention, and worked in a foreign country in TZM alloy (Mo Ti - 0.5-0. 08 zr - 0.02 C) as coating material for the Al powder, NH4CI as catalyst, Al2O3 as filler, prepared by pack cementation coatings. Determine the optimum coating parameters: m (Al2O3): m (Al): m (NH4CI) = 7: 2: 1,1 000 ℃, 12 h.
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