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Title:
METHOD FOR PREPARING HIGH-PERFORMANCE AND DIFFICULT-TO-DEFORM METAL PRECISION SEAMLESS TUBE
Document Type and Number:
WIPO Patent Application WO/2022/095272
Kind Code:
A1
Abstract:
A method for preparing a high-performance and difficult-to-deform metal precision seamless tube, comprising the following steps: heating treatment, perforation treatment, external grinding of a raw tube, internal grinding of the raw tube, straightening treatment, four-roller warm rolling, warm drawing and diameter reducing, warm drawing, wall reducing and diameter expanding, precision cold rolling, degreasing treatment, polishing treatment, surface grinding treatment, dust sweeping, flaw detection, metal structure performance detection, and sizing and packaging treatment. By means of multiple cycles of steps of warm drawing and diameter reducing, warm drawing, wall reducing and diameter expanding, and precision cold rolling, the cooperative control of key indexes, such as product size precision, surface quality, material performance and grain size, can be achieved, and products with higher precision, better performance and more outstanding limit specifications can be obtained, satisfying the requirements of products of different difficult-to-deform metal materials and different final product specifications, and flexibly dealing with the preparation of metal tube products with different material characteristics; moreover, the production efficiency is increased, and the production cost is effectively reduced.

Inventors:
CHU ZHIBING (CN)
YANG QIANHUA (CN)
WEI DONG (CN)
ZHANG DUO (CN)
XUE CHUN (CN)
ZHAO XIAODONG (CN)
LI YUGUI (CN)
Application Number:
PCT/CN2021/070206
Publication Date:
May 12, 2022
Filing Date:
January 05, 2021
Export Citation:
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Assignee:
UNIV TAIYUAN SCIENCE & TECH (CN)
International Classes:
B21C37/06
Foreign References:
CN1919530A2007-02-28
CN110899335A2020-03-24
CN101708511A2010-05-19
CN110560505A2019-12-13
CN107931331A2018-04-20
CN111112373A2020-05-08
CN110280592A2019-09-27
CN106345814A2017-01-25
CN102873512A2013-01-16
EP2925904A12015-10-07
Attorney, Agent or Firm:
TAIYUAN SHENLIDE INTELLECTUAL PROPERTY AGENCY(SPECIAL ORDINARY PARTNERSHIP) (CN)
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