METHOD FOR MANUFACTURING HIGH-NITROGEN AUSTENITIC STAINLESS STEEL PROPELLER CASTING FOR SHIP

WIPO Patent Application WO/2018/103087

A1

A method for manufacturing a high-nitrogen austenitic stainless steel propeller casting for a ship, comprising the following steps: S1, selecting molten steel for austenitic stainless steel preparation under a refined and to-be-cast state as a basic molten steel raw material; S2, melting an additive in a melting furnace; S3, adding the additive molten steel prepared in step S2 and the basic molten steel into a vacuum induction furnace in convection fashion; S4, manufacturing molds for propeller blades and components thereof; S5, taking out the original casting in step S4; S6, performing flame heating on the surfaces of the heat-treated propeller blades and components thereof in step S5; and S7, repeating step S6 for 2-4 times. Compared with conventional modes, the method has a better function, can effectively improve the use of high-nitrogen austenitic stainless steel on a ship, and can achieve greatly improved wear resistance, mechanical property and corrosion resistance.

SUN RUITAO (CN)
LI YONGDONG (CN)

PCT/CN2016/109268

June 14, 2018

December 09, 2016

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SUN RUITAO (CN)
LI YONGDONG (CN)

C22C33/04; B22C9/22; B22D27/08; C21D9/00

WO2015196032A1

2015-12-23

CN106636860A	2017-05-10
CN105562644A	2016-05-11
CN101285148A	2008-10-15
JPS6057500B2	1985-12-16
US5000801A	1991-03-19
JPH08209311A	1996-08-13

QINGDAO ZHIJIA INTELLECTUAL PROPERTY AGENCY FIRM (GENERAL PARTNERSHIP ) (CN)

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