Title:
SPHEROIDIZING-ANNEALED STEEL FOR LOW-TEMPERATURE-RESISTANT HIGH-STRENGTH BALL SCREW, AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/061185
Kind Code:
A1
Abstract:
The present invention relates to spheroidizing-annealed steel for a low-temperature-resistant high-strength ball screw. In percentage by mass, the chemical components of the steel comprises: C: 0.40-0.70%; Si: 1.20-1.80%; Mn: 1.00-1.60%; Cr: 0.80-1.20%; S: ≤0.025%; P: ≤0.025%; Ni: 0.10-0.60%; Cu: 0.30-0.80%; Mo: 0.10-0.40%; Al: ≤0.05%; Ca: ≤0.0010%; Ti: ≤0.003%; O: ≤0.0010%; As: ≤0.04%; Sn: ≤0.03%; Sb: ≤0.005%; Pb: ≤0.002%; and the balance of Fe and inevitable impurities. In the microstructure of the steel, the cementite exists in a spheroidized state with a diameter of 0.1-0.5 μm, preferably 0.3-0.5 μm, the spheroidization rate reaches 95% or above, and the rest of the structure is ferrite.
Inventors:
ZHAI JIAOLONG (CN)
BAI YUN (CN)
FAN QIHANG (CN)
WU XIAOLIN (CN)
LIU QIAN (CN)
SHAO SHUYAN (CN)
LI YUN (CN)
ZHANG KUI (CN)
CHEN ZELEI (CN)
LI QIAN (CN)
GAO LEI (CN)
MENG YU (CN)
LIAO SHUQUAN (CN)
LU SHA (CN)
BAI YUN (CN)
FAN QIHANG (CN)
WU XIAOLIN (CN)
LIU QIAN (CN)
SHAO SHUYAN (CN)
LI YUN (CN)
ZHANG KUI (CN)
CHEN ZELEI (CN)
LI QIAN (CN)
GAO LEI (CN)
MENG YU (CN)
LIAO SHUQUAN (CN)
LU SHA (CN)
Application Number:
PCT/CN2022/120821
Publication Date:
April 20, 2023
Filing Date:
September 23, 2022
Export Citation:
Assignee:
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD (CN)
International Classes:
C22C38/02; B21B1/46; C21C7/10; C21D1/32; C21D8/06; C22C33/06; C22C38/04; C22C38/06; C22C38/34; C22C38/42; C22C38/44; C22C38/58
Foreign References:
| CN114134411A | 2022-03-04 | |||
| CN110484837A | 2019-11-22 | |||
| CN107747034A | 2018-03-02 | |||
| CN110983178A | 2020-04-10 | |||
| CN113249643A | 2021-08-13 | |||
| JP2004076093A | 2004-03-11 |
Attorney, Agent or Firm:
JIANGYIN QINGZHOU PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
Download PDF:
Previous Patent: SURGICAL ROBOT, SURGICAL INSTRUMENT, AND FORCE TRANSMISSION DEVICE
Next Patent: OPTICAL APPARATUS AND HEAD-MOUNTED DISPLAY DEVICE
Next Patent: OPTICAL APPARATUS AND HEAD-MOUNTED DISPLAY DEVICE