Method of manufacturing corrosion resistant tubing from welded stock of titanium or titanium base alloy

Patent · Tue Jul 13 04:00:00 EDT 1993

OSTI ID:6137802

Meredith, S E; Benjamin, J F

A method is described of manufacturing corrosion resistant tubing from seam welded stock of a titanium or titanium based alloy, comprising: cold pilgering a seam welded tube hollow of titanium or titanium based alloy in a single pass to a final sized tubing, the tube hollow comprising a strip which has been bent and welded along opposed edges thereof to form the tube hollow, the tube hollow optionally being heat treated prior to the cold pilgering step provided the tube hollow is not heated to a temperature which would transform the titanium or titanium alloy into the beta phase, the cold pilgering effecting a reduction in cross sectional area of the tube hollow of at least 50% and a reduction of wall thickness of at least 50%, in order to achieve a radially oriented crystal structure; and annealing the final sized tubing at a temperature and time sufficient to effect complete recrystallization and reform grains in a weld area along the seam into smaller, homogeneous grains.

• Assignee: Sandvik Special Metals, Corp, Kennewick, WA (United States)
• Patent Number(s): A; US 5226981
• Application Number: PPN: US 7-826876
• OSTI ID: 6137802
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ANNEALING
CORROSION RESISTANCE
CRYSTAL STRUCTURE
DIMENSIONS
FABRICATION
GRAIN SIZE
HEAT TREATMENTS
JOINTS
MICROSTRUCTURE
RECRYSTALLIZATION
SIZE
THICKNESS
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
TUBES
WELDED JOINTS