发明名称 |
HIGH-STRENGTH SPRING STEEL WIRE, HIGH-STRENGTH SPRINGS AND PROCESSES FOR PRODUCTION OF BOTH |
摘要 |
The invention provides a high-strength spring excellent in corrosion fatigue characteristics; a steel wire for high -strength springs; and processes for the production of both. A steel wire for high-strength springs which contains by mass C: 0.35 to 0.50%, Si: 1.00 to 3.00%, Mn: 0.10 to 2.00%, P: 0.015% or below, and S: 0.015% or below with the balance consisting of Fe and unavoidable impurities, characterized in that in the differential scanning calorimetry accompanied with heating from 50°C to 600°C at a temperature rise rate of 0.25°C/s, an exothermic reaction peak is present only at 450°C or above; high-strength springs; and a process for the production of high-strength springs, characterized by conducting tempering under the conditions satisfying the following relationship (wherein T[K] is tempering temperature; t[s] is tempering time; and Si%[mass%] is content of Si): 16000 < (T-40OESi%]) OE(31.7+log t) < 23000 |
申请公布号 |
WO2008102573(A1) |
申请公布日期 |
2008.08.28 |
申请号 |
WO2008JP50226 |
申请日期 |
2008.01.07 |
申请人 |
NIPPON STEEL CORPORATION;KUBOTA, MANABU;HASHIMURA, MASAYUKI |
发明人 |
KUBOTA, MANABU;HASHIMURA, MASAYUKI |
分类号 |
C22C38/00;C21D9/02;C21D9/52;C22C38/04;C22C38/60;F16F1/02 |
主分类号 |
C22C38/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|