Method for preparing Mo-Si-Al-K cold-rolling thin molybdenum plate band

Abstract

The invention relates to a Mo-Si-Al-K cold rolling thin molybdenum strip and a preparation method thereof. The invention is characterized in that the preparation process is: sintering the Mo-Si-Al-K into high temperature molybdenum billet; pre-annealing before the rolling at the temperature of 1300-1400 DEG C; implementing the hot rolling cogging processing on the high temperature molybdenum billet with the first pass deformation of 20 to 30 percent; implementing the intermediate annealing, the alkali washing and the warm rolling at the temperature of 900-1100 DEG C when the rolling deformation reaches to 70 to 75 percent to obtain a middle thick molybdenum strip; cold cooling the middle thick molybdenum strip into the specification of a finally finished product; implementing the vacuum stress relief annealing on the finished product at the temperature of 800-850 DEG C. And then the high temperature cold rolling thin molybdenum strip required by the invention is obtained. The product obtained through the invention is provided with strong high temperature strength and high recrystallization temperature. The cold rolling thin molybdenum strip product has the good properties of surface quality, high size precision, strong high temperature strength, good plasticity, long service life, etc. and can be widely used to produce molybdenum crucibles, boats, anodes of transmitting tubes with large power (U type), gate molybdenum tubes, heating unit, heat shields and other structural parts.

Description

technical field [0001] The invention relates to a Mo-Si-Al-K cold-rolled thin molybdenum plate strip and a preparation method thereof. Background technique [0002] Because refractory metal molybdenum has high high temperature strength, good electrical and thermal conductivity, low expansion coefficient and easy processing, it is used in special bulbs and electric light source devices such as automotive tungsten halogen lamps, high-pressure sodium lamps, lighting tungsten halogen lamps, etc. Molybdenum wire is widely used to manufacture parts such as bulb hooks, core wires for winding filaments, guide rods, lead-out wires and plastic brackets. It is widely used as wire-cut molybdenum wire in the metal processing industry, and in the kiln industry. Used as a heating element for hydrogen furnaces. [0003] Cold-rolled thin molybdenum plates and strips are mainly used in electric vacuum and electric light source industries. Thin molybdenum plates and strips are processed into ...

AI Technical Summary

Problems solved by technology

If used in the above industries, thin molybdenum plates and strips are required to have good low-temperature plasticity and good high-temperature performance. The recrystallization temperature of pure molybdenum plates is only 1000-1200 ° C, so brittleness and fracture often occur, and its high-temperature strength It is also low and easy to deform, which is far from meeting the requirements of these industries

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