Molybdenum-base alloy and its preparing method

Abstract

This invention relates to a Mo-base alloy and its preparation method, and the components of the Mo-base alloy are: 0.1-0.8% hydrozirconium, 0.1-0.8% carbon, 0.4-2.2% titanium carbon with its grain size less than 0.6 micron, and 0.5-2.5% rare earth oxide with grain size less than 40 nm, and the rest is Mo. The above materials pass through homogeneity, pressing and agglomeration to form the Mo-base alloy. The Mo-base alloy can strength the solid solution and make it become dispersed carbonizing phase to improve the sticking strength of crystal lattices.

Description

Technical field: [0001] The invention relates to a molybdenum-based alloy composition and a method for preparing the composition, in particular to a molybdenum-based alloy composition suitable for the mandrel plug of a steel pipe rolling mill and a crucible in the rare earth smelting industry and the preparation thereof Methods. Background technique: [0002] The detection data of pure molybdenum shows that the intensity δ of pure polonium at 20°C B =40kg / mm 2 About, the strength at 1000°C is 7kg / mm 2 , while the strength at 2000°C is only 1.2kg / mm 2 , Therefore, pure molybdenum does not have unique physical properties such as high temperature strength and oxidation resistance. But molybdenum is a metal that can maintain the high temperature strength and corrosion resistance of its alloys, that is, molybdenum can have unique physical properties in the form of alloys, for example, mandrel plugs and crucibles used in steel pipe rolling mills are made of molybdenum alloys ...

AI Technical Summary

Problems solved by technology

If the particle size of the active component is too large, the concentration of impurities on the unit crystal interface will increase, and the segregation of elements such as atomic oxygen and carbon in the impurities on the grain boundary will increase the tendency of intergranular fracture, resulting in The strength and other properties of the alloy are reduced; at the same time, the large particle size can also affect the diffusion between molecules, so that it cannot be fully alloyed during the sintering process, and there are large pores in the alloy matrix, which is prone to cracks and serious affect its service life