Title:
HIGH-STRENGTH AND TOUGHNESS FREE-CUTTING NON-QUENCHED AND TEMPERED ROUND STEEL AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/152158
Kind Code:
A1
Abstract:
Disclosed is a high-strength and toughness free-cutting non-quenched and tempered round steel having the following chemical elements by mass percentage: C: 0.36-0.45%, Si: 0.20-0.70%, Mn: 1.25-1.85%, Cr: 0.15-0.55%, Ni: 0.10-0.25%, Mo: 0.10-0.25%, Al: 0.02-0.05%, Nb: 0.001-0.040%, V: 0.10-0.25%, S: 0.02-0.06%, and the balance being Fe and inevitable impurities. Also disclosed is a method for manufacturing the non-quenched and tempered round steel, comprising the steps of: S1: smelting and casting; S2: heating; S3: forging or rolling; and S4: finishing. The high-strength and toughness free-cutting non-quenched and tempered round steel described above is high-strength and has good impact toughness, elongation and cross-sectional shrinkage, and has good cutting performance and fatigue resistance, and can be used in situations requiring a high-strength steel material, such as automobiles and engineering machinery.
Inventors:
GAO JIAQIANG (CN)
ZHAO SIXIN (CN)
HUANG ZONGZE (CN)
CHEN LIN (CN)
ZHAO SIXIN (CN)
HUANG ZONGZE (CN)
CHEN LIN (CN)
Application Number:
PCT/CN2022/071570
Publication Date:
July 21, 2022
Filing Date:
January 12, 2022
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C22C38/58; C21D8/00
Foreign References:
| CN102899589A | 2013-01-30 | |||
| CN111304517A | 2020-06-19 | |||
| CN104451417A | 2015-03-25 | |||
| GB2287956A | 1995-10-04 |
Attorney, Agent or Firm:
WATSON & BAND INTELLECTUAL PROPERTY AGENT LTD. (CN)
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