Method for preparing multilayer metal composite pipe

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United States of America Patent

PATENT NO 11850645
APP PUB NO 20220040745A1
SERIAL NO

17509043

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Abstract

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A method for preparing a multilayer metal composite pipe includes steps of: internally and externally grinding blank pipes; cleaning oil stains; assembling a multilayer metal pipe; drawing to reduce a diameter; performing high-speed friction welding at the pipe ends; performing heat treatment; performing four-roller cross-rolling; straightening; performing two-roller cold-rolling; performing cold-drawing to reduce the diameter; performing cold-expansion to reduce the diameter; performing precise cold-rolling; degreasing; brightening; performing surface grinding; cleaning dust; detecting multilayer metal interface bonding; detecting flaws; testing metal structure performance; and sizing and packaging. By cycling the cold-drawing, the cold-expansion, and the precision cold-rolling, key indicators such as product dimensional accuracy, surface quality, material properties, and crystal grain size can be collaboratively controlled, so as to achieve higher accuracy, better performance, and more outstanding extreme specifications. The present invention solves the problem of inconsistent extension due to differences in metal properties.

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Patent Owner(s)

Patent OwnerAddress
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGYNO 66 WALIU ROAD WANBAILIN DISTRICT TAIYUAN CITY SHANXI PROVINCE TAIYUAN CITY SHANXI PROVINCE 030000

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chu, Zhibing Shanxi, CN 5 3
Li, Yugui Shanxi, CN 6 8
Liu, Cuirong Shanxi, CN 1 1
Wei, Dong Shanxi, CN 168 1236
Xue, Chun Shanxi, CN 6 18
Yang, Qianhua Shanxi, CN 2 1
Zhang, Duo Shanxi, CN 52 233

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