ＮＰＲ非磁性ロックボルト鋼材料及びその生産方法

Japanese Patent JP7029544

B2

An NPR non-magnetic steel material for rock bolt and a production method thereof are disclosed. The NPR non-magnetic steel material for rock bolt has a composition, in weight percent, consisting of: C: 0.4-0.7%, Mn: 15-20%, Cr: 1-18%, Si: 0.3-3%, Ca: 0.05-0.15%, Cu: ≤0.03%, Ni: ≤0.02%, S: ≤0.001%, P: ≤0.001%, and the rest being Fe and unavoidable impurity elements. The NPR non-magnetic steel material for rock bolt and the production method thereof effectively solve the problems of steel materials for rock bolt in the prior art such as strong magnetism, low tensile strength and low effective elongation . The NPR non-magnetic steel material for rock bolt has a fully-austenitized structure and is non-magnetic, its yield strength is adjustable in the range of 600-1000MPa, and its elongation is adjustable in the range of 20-60%.

JPH03111583	INORGANIC MATTER-COATED STAINLESS STEEL
JP3373983	[Title of the Invention] A method for producing a ferritic stainless steel strip having excellent press moldability, rigging resistance and surface properties.
JPH06279928	HIGH STRENGTH RAIL EXCELLENT IN TOUGHNESS AND DUCTILITY AND ITS PRODUCTION

HE,Manchao
XIA,Min
Guo, Hongyang
One, Jiupin

JP2020545411A

March 03, 2022

May 23, 2018

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HE,Manchao
XIA,Min

C22C38/00; B22D11/00; B22D11/16; C21C7/00; C21C7/06; C21C7/064; C21D8/06; C22C38/58

JP59028561A
JP58197256A
JP2009007596A
JP2011006776A
JP2000160233A
JP2016191124A

US20120156085

Okuyama Shoichi
Ogawa Mitsuaki
Nishiyama Haruyuki
Sekiya Mitsuji

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