鋼管及び鋳造品用耐熱鋼

Japanese Patent JP7428822

B2

A heat-resistant steel for a steel pipe and a casting, consisting of elements: 0.08-0.14wt% of C, 0.20-0.40wt% of Si, 0.30-0.60wt% of Mn, 9.00-10.00wt% of Cr, 2.80-3.30wt% of Co, 1.65-1.90wt% of W, 0.55-0.80wt% of Mo, 0.15-0.25wt% of V, 0.03-0.08wt% of Nb, 0.006-0.015wt% of N, 0.009-0.015wt% of B, ≤0.20wt% of Ni, and the balance being Fe and inevitable impurities. A preparation method for the steel pipe comprises: for the heat-resistant steel, taking raw materials according to an element ratio, mixing, and then smelting; firstly, making a pipe blank by using any one of continuous casting, die casting, hot rolling, or hot forging; then making the pipe blank into a steel pipe by using any one of hot rolling, hot extrusion, hot expansion, cold drawing, cold rolling, or forging boring; and then normalizing or quenching the steel pipe and then tempering same to obtain a finished steel pipe. A preparation method for the casting comprises: for the heat-resistant steel, taking raw materials according to an element ratio, mixing, and then smelting; casting then to obtain a casting; and then normalizing or quenching the casting and then tempering same to obtain a finished casting.

May, Limbo
Sung, Lingen
Ahn, Chun Shan
One, You

JP2022557133A

February 06, 2024

January 20, 2021

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Shanghai Electric Power Generation Equipment Company Limited

C22C38/00; C21D9/00; C21D9/08; C22C38/60

JP11036038A
JP2013039602A
JP2016216815A
JP4371551A

CN111139409A
CN104726779A

IBC Ichibancho Patent Attorney Corporation

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