METHOD FOR PRODUCING TUBING PRODUCTS BASED ON ZIRCON ALLOYS

摘要

The present invention relates to a method for producing tubing products from binary and multicomponent zircon alloys, consisting in obtaining from an ingot previously submitted to a beta distortion process a source preparation, hot forming said source preparation at the subsistence temperature of zirconium alpha + beta to get a tubular blank hardenning the latter at a temperature higher by 30 to 60 DEG to the temperature at which the alloy passes from an intermediary state zirconium alpha + beta to the beta state of zirconium, mechanically processing, following by a tempering process at the subsistence temperature of alpha zirconium until the finished product is obtained, the cold distortion of the tubular product being effected with the following global stretching: mu SIGMA > 100 for the finished products and mu SIGMA <50 for the TREX or SUPER TREX-type semi-finished tubular products, whereby at the first stage of the cold distortion the stretching mu <2.0, mu =Sprod/Stub (where Sprod is the cross-sectional surface of the product before the milling process and Stub is the cross-sectional surface of the laminated tube) and mu =Ssource material/Sfinished tube (where Ssource material is the cross-sectional surface of the blank before the first milling process and Sfinished tube is the cross-sectional surface of the finished tube after the last milling process). <IMAGE>