Title:
ロックボルト用ＮＰＲ鋼材料及びその生産方法
Document Type and Number:
Japanese Patent JP6998468
Kind Code:
B2
Abstract:
An NPR steel material for rock bolt and a production method thereof are disclosed. The NPR steel material for rock bolt has a composition, in weight percent, consisting of: C: 0.4-0.7%, Mn: 15-20%, Si: <0.1%, Cu: <0.03%, Cr: ≤0.01%, Ni: ≤0.02%, S: ≤0.001%, P: ≤0.001%, and the rest being Fe and unavoidable impurity elements. The NPR steel material for rock bolt and the production method thereof effectively solve the problem that rock bolts in the prior art have low tensile strength and low effective elongation. The NPR steel material for rock bolt has a yield strength adjustable in the range of 500-1100MPa, and an elongation adjustable in the range of 10-80%.
Inventors:
HE,Manchao
XIA,Min
Guo, Hongyang
One, Jiupin
XIA,Min
Guo, Hongyang
One, Jiupin
Application Number:
JP2020545412A
Publication Date:
January 18, 2022
Filing Date:
May 23, 2018
Export Citation:
Assignee:
HE,Manchao
XIA,Min
XIA,Min
International Classes:
C22C38/00; B22D11/00; B22D11/16; C21C7/00; C21C7/06; C21C7/064; C21D8/06; C22C38/58
Domestic Patent References:
| JP59215464A | ||||
| JP55091956A | ||||
| JP2000160233A | ||||
| JP55104426A |
Foreign References:
| US20120128524 |
Attorney, Agent or Firm:
Okuyama Shoichi
Ogawa Mitsuaki
Nishiyama Haruyuki
Sekiya Mitsuji
Kunitoshi Takuma
Rie Ikemoto
Tetsuo Matsushima
Kohei Arihara
Ogawa Mitsuaki
Nishiyama Haruyuki
Sekiya Mitsuji
Kunitoshi Takuma
Rie Ikemoto
Tetsuo Matsushima
Kohei Arihara