GB/T 1591-1994低合金高强度结构钢 |
Q460C
Q460D
Q460E |
Q460C:
C≤0.20,Mn 1.00~1.70,Si≤0.55,P≤0.035,S≤0.035,V0.02~0.20,Nb0.015~0.060,Ti0.02~0.20,A1≥0.015,Cr≤0.7,Ni≤0.7
Q460D:
C≤0.20,Mn1.00~1.70,Si≤0.55,P≤0.030,S≤0.030,V0.02~0.20,Nb 0.015~0.060,Ti0.02~0.20,A1≥0.015,Cr≤0.7,Ni≤0.7
Q460E:
C≤0.20,Mn 1.00~1.70,Si≤0.55,P≤0.025,S≤0.025,V0.02~0.20,Nb 0.015~0.060,Ti0.02~0.20,A1≥0.015,Cr≤0.7,Ni≤0.7
型钢和钢棒的Nb含量下限为0.005.残余元素Cr,Ni,Cu含量各不大于0.30。为改善钢的性能,可加入按计算量0.002~0.20的KE元素 |
厚度(直径、/边长)
/mm
≤16
>16~≤35
>35~≤50
>50~≤100 |
(C、D、E级)
460
440
420
440 |
(C、D、E级)
550~720 |
(C、D、E级)
17 |
C(0℃)34
D(-20℃)34
E(-40℃)
27 |
GB/T 16270-1996
高强度结构钢热处理和控轧钢板、钢带 |
Q460C
Q460D
Q460E |
Q460C:
C≤0.20,Mn 0.00~1.60,Si≤0.55,P≤0.035,S≤0.035,V≤0.10,Nb≤0.06,Ti≤0.20,Cr≤0.30,Ni≤0.70,Mo≤0.20
Q460D:
C≤0.18,Mn1.00~1.60,Si≤0.55,P≤0.030,S≤0.030,V≤0.10,Nb≤0.06,Ti≤0.20,Cr≤0.30,Ni≤0.70,Mo≤0.20
上述V、Nb、Ti等细化晶粒元素至少应加一种或加A1,而且最低含量应加0.015.为改善钢的性能,可加入RE元素,其加入量按0.02~0.20计算。经协商,可加入N元素,其熔炼分析含量不得大于0.020.Cu残余含量不得大于0.30.如果Cu作为合金元素不得大于1.50 |
淬火+
回火、
正火+
回火、正火、控轧 |
(规定残余伸长应力ór0.2)
厚度≤50mm,
460:
厚度50~100mm
440 |
(C、D、E级)
550~710 |
(C、D、E级)
17 |
C(0℃)40
D(-20℃)40
E(-40℃)27 |