Wantang FU
,
Yi XIONG
,
Jun ZHAO
,
Yong LI
,
T.Furuhara
,
T.Maki
材料科学技术（英）
The microstructural evolution of pearlite during severe cold rolling in Fe-0.8C binary alloy and Fe-1Mn-0.8C ternary alloys was investigated by using SEM, TEM and XRD etc. The results show that the deformed pearlite consists of irregularly bent lamella, coarse lamella with shear-band and fine lamella. As the rolling reduction increases, the proportion of fine lamella increases. The strong plastic deformation, amorphization and dissolution of cementite take place during the severe cold rolling. The maximum carbon content in ferrite reaches 0.15 mass% after 90% cold rolling.
关键词:
Pearlite
,
null
,
null
,
null
,
null
,
null
Zhenni ZHOU
金属学报(英文版)
The pearlite transformation in a Mo-containing iron alloy was investigated under 12~T magnetic field. The pearlite transformation was accelerated owing to the application of a strong magnetic field. Pearlite was of degenerated morphology without the presence of a strong magnetic field; but the degeneracy of pearlite is reduced when a strong magnetic field was applied, which may be attributed to the effect of strong magnetic field on faster carbon diffusion and less molybdenum segregation caused by a strong magnetic field.
关键词:
Steels
,
Pearlite
,
Phase transformation
,
Strong magnetic field
吴良芹
,
任娟
上海金属
研究了热轧后超快冷工艺对Q390C钢组织与性能的影响.结果表明:超快冷后Q390C钢的组织为珠光体和铁素体,其屈服强度、抗拉强度和断后伸长率分别可达388 MPa、548 MPa和27.3％,-20℃的冲击功为47 J;超快冷工艺提高了Q390C钢的力学性能.
关键词:
超快冷工艺
,
力学性能
,
组织
,
珠光体
,
铁素体
杨玉
,
杨旭
,
张吉富
,
乔磊
,
刘志伟
,
王英海
上海金属
采用TMCP控轧控冷技术,用普碳钢成分生产出了Q345B高强度热轧带钢.生产中通过调整中间坯厚度与成品厚度之比,同时控制终轧温度和卷取温度,将铁素体晶粒细化和珠光体相变强化相结合,得到了高强高韧性热轧钢板.钢板冷成型性和焊接性良好,实现了Q345B的合金减量化生产.
关键词:
控轧控冷
,
Q345B钢
,
珠光体
,
铁素体
,
合金减量化
常亮
,
张伟
,
杨超
,
陈湘茹
,
华勤
,
翟启杰
上海金属
利用图像分析软件定量分析了铌对球墨铸铁石墨球形态和铸态组织的影响.研究结果表明,添加铌能够使石墨化程度和球化率降低,圆度和石墨球大小增加,石墨球数量显著降低,但少量铌对球墨铸铁的石墨化、球化率、圆度、石墨球大小等影响不大.少量铌能显著增加珠光体数量.
关键词:
球墨铸铁
,
铌
,
石墨球
,
珠光体
