Title:
ROLLING PROCESS OF WELDING WIRE STEEL FOR WEATHER-RESISTANT BRIDGE
Document Type and Number:
WIPO Patent Application WO/2021/057197
Kind Code:
A1
Abstract:
A rolling process of welding wire steel for a weather-resistant bridge, comprising heating, hot rolling, and slow cooling processes. The heating temperature in the heating process is controlled to be 960-1000°C. The final rolling temperature in the hot rolling process is controlled to be 805-835°C. A cover at the entrance of an air-cooling line of the slow cooling process is opened, and all the other covers are closed. The rolling process can effectively control a hot-rolled structure. The hot-rolled structure is ferrite plus granular bainite, and martensite that does not affect drawing. The hot-rolled wire rod can be drawn directly into a 1.2 mm welding wire, during which no annealing is required. The process does not increase production costs, and can reduce raw material manufacturing costs, and has significant economic benefits.
Inventors:
XIAO BINGZHENG (CN)
WANG CANXIANG (CN)
WANG CANXIANG (CN)
Application Number:
PCT/CN2020/101764
Publication Date:
April 01, 2021
Filing Date:
July 14, 2020
Export Citation:
Assignee:
NANJING IRON & STEEL CO LTD (CN)
International Classes:
C21D8/06; C21D1/00
Foreign References:
| CN110760659A | 2020-02-07 | |||
| CN102513725A | 2012-06-27 | |||
| CN102978362A | 2013-03-20 | |||
| CN105562961A | 2016-05-11 | |||
| CN109352209A | 2019-02-19 | |||
| JPS5814848B2 | 1983-03-22 | |||
| JPS60184631A | 1985-09-20 |
Other References:
ZHU, YONGPING: "Analysis of Controlled Rolling and Controlled Cooling Technology for Φ5.5mmER50-6 Welding Wire Steel", LIUGANG SCIENCE AND TECHNOLOGY, PROCEEDINGS OF THE 5TH STEEL ROLLING ACADEMIC CONFERENCE IN SOUTH-CENTRAL/PAN-PEARL RIVER DELTA REGION, 2009, 31 December 2009 (2009-12-31), XP009527170, ISSN: 1810-4770
Attorney, Agent or Firm:
NANJING SUGAO PATENT AND TRADEMARK FIRM ( ORDINARY PARTNERSHIP ) (CN)
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