A microcrystalline high-strength corrosion-resistant titanium alloy pipe and its preparation method

A titanium alloy and pipe technology, which is applied in the field of microcrystalline high-strength and corrosion-resistant titanium alloy pipe and its preparation field, can solve the problems of complicated preparation methods, low strength, coarse structure, etc. Small size effect
CN108611529BInactive Publication Date: 2020-04-21YANSHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YANSHAN UNIV
Publication Date
2020-04-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a microcrystalline and high corrosion resistance type titanium alloy pipe and a preparation method thereof, and belongs to the technical field of titanium alloy pipes. According to the technical scheme, the preparation method is characterized by comprising the steps of preparing titanium sponge as a raw material; controlling the following chemical components in percentage by mass: 5.0-7.0% of Al, 2.0-3.0% of Nb, 0.5-2.0% of Zr, 0.7-1.2% of Mo, 0.02-0.05% of Fe, 0.01-0.03% of Si, and the balance Ti; smelting and forging to obtain a pipe blank; maintaining the temperatureof 990-1040 DEG C for 60-120min; performing cross piercing rolling; cooling; maintaining the temperature of 700-900 DEG C for 20-40min; rolling to obtain a pre-fabricated pipe; annealing for 30min to2h under the temperature of 350-550 DEG C; and cooling to obtain the pipe. The pipe structure contains an alpha phase and a beta phase; the grain size of the alpha phase is 0.5-1 micron; the grain size of the beta phase is 0.1-0.3 microns; and the intensity, the toughness and the corrosion resistance are greatly improved.
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Description

technical field

[0001] The invention belongs to the technical field of titanium alloy pipes, and in particular relates to a microcrystalline high-strength corrosion-resistant titanium alloy pipe and a preparation method thereof. Background technique

[0002] Titanium alloy has high yield strength, low density, and high specific strength. The quality of pipes of the same specification is only about 60% of that of nickel-based alloy pipes. Further, through plastic deformation and heat treatment, high strength and high strength can be obtained. Comprehensive mechanical properties of good plasticity and toughness. Titanium alloy pipes also have good corrosion resistance, H 2 S, CO 2 , HCl corrosion performance is better than that of nickel-based alloys, and it has a broader application prospect in fields such as oil well pipes. At present, the preparation methods of titanium alloy pipes mainly include hot extrusion and cross-rolling perforation, etc. The Chinese invention pat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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