Wang Jingzhong, Liu Zhengdong, Cheng Shichang, et al. Effect of Elevated Temperature Aging on Ambient Tensile Properties of Steel S31042[J]. Special Steel, 2011, 32(3): 61-64.
Wang Jingzhong, Liu Zhengdong, Cheng Shichang, et al. Effect of Elevated Temperature Aging on Ambient Tensile Properties of Steel S31042[J]. Special Steel, 2011, 32(3): 61-64.DOI:
高温时效对S31042钢管室温拉伸性能的影响
摘要
研究了700℃0~3 000 h时效对Φ57 mm×9.7 mm S31042无缝钢管(%:0.06C、0.35Si、1.18Mn、24.50Cr、20.54Ni、0.40Nb、0.23N)室温拉伸性能的影响。结果表明
0~1 000 h时效时
随时效时间的增加
S31042钢屈服(R
p0.2
)和抗拉强度(R
m
)迅速增加
但钢的伸长率(A)和断面收缩率(Z)急剧降低;当时效时间超过1 000 h
各项性能变化趋缓;随时效时间增加
室温拉伸断口由含丰富韧窝的韧性断口逐渐过渡到沿晶脆性断口;0~1000h时效随时效时间增加
晶界处Cr
23
C
6
相迅速增多
超过1 000 h时效
析出相的变化不明显。
Abstract
The effect of aging at 700 T for 0 ~ 3 000 h on ambient tensile properties of Φ57 mm x 9. 7 mm seamless tube steel S31042 (% : 0.06C
0. 35Si
1. 18Mn
24. 50Cr
20. 54Ni
0.40Nb
0.23N) has been studied. Results show that as aging for 0 - 1 000 h
with increasing aging time the yield strength (R
p0.2
) and tensile strength ( R
m
) of steel S31042 rapidly increase
but the elongation (A) and reduction of area (Z) of steel quick decrease; as aging for more than 1 000 h
the variation of each property index is tending slow; with increasing aging time
the morphology of ambient tensile fracture gradually transforms from tough fracture with enriching dimples to brittle intercrystalline fracture ; as aging for 0 ~ 1 000 h
with increasing aging time the amount of Cr
23
C
6
phase at grain boundary rapidl
y increases
and as aging time more than 1 000 h
the change of amount of precipitates at grain boundary is not obvious.