|
|
|
| Effect of Substructure on Toughness of Lath Martensite/Bainite Mixed Structure in Low-Carbon Steels |
LUO Zhi-jun, SHEN Jun-chang, SU Hang, et al |
|
|
|
|
Abstract Substructure of M/B mixed structure in a low carbon NiCrMoV steel obtained through different cooling mode were quantitative analysis by optical microscope, SEM, EBSD and TEM to investigate the effect of the substructure on toughness. The results indicated that with the same prior austenite grain size and mixed by different ratio of M and B, toughness of steel enhanced with decrease of packet and block size and the lath width was about 0.38um. Calculation showed that packet and block boundary have the same effect on delaying crack extension, furthermore, effect of block width on impact energy was notably bigger than packet one. Therefore, block could work as a contributing microstructure controlled substructure in low carbon martensite steels, which means that block size was ��the effect grain size controlling toughness��.
|
|
Received: 02 November 2009
|
|
Corresponding Authors:
LUO Zhi-jun
|
|
|
|
| [1] |
Ying Ci,*,Zhan-zhan Zhang. Simulation study on heat-affected zone of high-strain X80 pipeline steel[J]. Chinese Journal of Iron and Steel, 2017, 24(9): 966-973. |
| [2] |
YIN Cun-hong��LIANG Yi-long. Friction induced wear and martensite deformation behavior of 20CrNi2Mo steel[J]. Chinese Journal of Iron and Steel, 2017, 52(8): 81-86. |
| [3] |
Chen-chong Wang,Chi Zhang*,Zhi-gang Yang. Effects of Ni on austenite stability and fracture toughness in high Co-Ni secondary hardening steel[J]. Chinese Journal of Iron and Steel, 2017, 24(2): 177-183. |
| [4] |
Gan- lin XIE,An HE,Hai- long ZHANG,Gen- qi WANG,Xi- tao WANG. A Physically Based Dynamic Recrystallization Model Considering Orientation Effects for a Nitrogen Alloyed Ultralow Carbon Stainless Steel during Hot Forging[J]. Chinese Journal of Iron and Steel, 2016, 23(4): 364-371. |
| [5] |
Xi- min ZANG,Tian- yu QIU,Wan- ming LI,Xin DENG,Zhou- hua JIANG,,Hua SONG. Electroslag Remelting Withdrawing Technology for Offshore Jack- up Platform Rack Steel Manufacturing Process[J]. Chinese Journal of Iron and Steel, 2016, 23(4): 297-304. |
| [6] |
L�@ Ke��,LI Jun,ZHAO Yu,LI Bo. Effect of reduction of cold rolling on primary recrystallization annealing of grain��oriented silicon steel without inhibitor[J]. Chinese Journal of Iron and Steel, 2016, 28(4): 69-73. |
|
|
|
|
2010, Vol. 17 
