铁素体晶粒

C-Mn-Nb钢在控轧控冷条件下相变后铁素体晶粒尺寸的预测

Prediction of Ferrite Grain Size in C-Mn-Nb Steel After Phase Transformation During Controlled Rolling and Controlled Cooling

试验结果表明，在再结晶的低温区（580~620℃）退火和采用双台阶退火，SPCC-SD冷轧板均具有较细的铁素体晶粒、较高的屈服强度和抗拉强度。

The results show that SPCC-SD cold rolled steel sheet can obtain refined ferrite grain and exhibit higher yield strength and tensile strength when annealed at recrystallization low temperature zone ( 580 ~ 620 ℃) and applied double steps annealing .

在轧制和轧后冷却过程中，由于细颗粒TiC的析出和铁素体晶粒的细化提高了钢的强度性能；

Precipitation of fine particles of TiC and ferrite grain refinement during rolling and cooling can increase strength .

Ti（C，N）粒子越小，所占体积分数越大，越能有效地细化铁素体晶粒，从而提高钢铁材料的综合性能。

The smaller Ti ( C , N ) particle will occupy more volume percentage , and it also can more effectively to refine ferrite grain and increase steel and iron combination properties .

用填充法模拟石墨球长大，用MonteCarlo法模拟奥氏体、铁素体晶粒长大。

The growth of nodular graphites is simulated by the use of filling method and the growth of the austenitic and ferritic grains using Monte Carlo method .

随着V、N含量的增加，铁素体晶粒尺寸减小，弥散析出的颗粒变多、变细，屈服强度得到大大提高，同时韧塑性略有降低；

The ferrite grain size is minished , precipitated particles become thin 、 many more and the yield strength is raised and toughness-plasticity is lowered slightly with V and N content being increased .

Nb可有效细化变形诱导铁素体晶粒尺寸，V的析出物对超细晶组织的沉淀强化作用十分显著。

Grain size of ferrite induced by deformation can be refined by microalloyed element Nb . Precipitation of V ( C , N ) improve strength effectively in ultrafine steels .

基体中析出的VC颗粒大小变化不明显；铁素体晶粒长大，焊缝区的强度降低。

Of M-A island becomes vague , and the size of VC precipitated from ferrite matrix is not obviously changed , and ferrite grains grow and the strength of welds is reduced .

在-45～-65℃范围内，CharpyV缺口试样中的临界事件是铁素体晶粒尺寸的微裂纹扩展进入铁素体基体；

The critical event in the notched charpy V specimens at - 45 & 65 ℃ is the propagation of a ferrite grain-sized microcrack into the ferrite matrix .

结果表明：钢A和钢B冷轧低碳钢板焊接HAZ具有相同的显微组织特征，但铁素体晶粒大小不同。

The results obtained show the microstructure characteristics of the welded HAZ of the cold rolled low carbon sheets ( steel A and B ) are same , but the ferrite grain sizes are different .

在工业试生产中，铁素体晶粒尺寸3~4μm的V-N微合金化超细晶粒钢已经试制成功。

As a result , ultrafine ferrite strip with the grain size of 3-4 μ m have been manufactured .

在热模拟单向压缩实验中，通过形变参数的变化考察了Q235碳素钢应变强化相变的基本规律及铁素体晶粒细化效果。

The microstructure evolution of Q235 plain carbon steel in multi-pass hot deformation was investigated by means of hot compression simulation .

通过对La在高纯净钢中合金化作用的研究，结果表明，固溶La对γ→α相变产生明显的影响，细化铁素体晶粒，提高了硬度。

Alloying effect of La in high purity steel was investigated . It is shown that the effect of solution La on γ→α phase transformation was remarkable . The ferrite grains were fined and hardness was increased .

最高的ReL达到470MPa，Z达到67.5%，铁素体晶粒度最细达11.6级，线材同圈性能均匀性也得到提高。

The highest R_ ( eL ) is 470 MPa and Z is 67.5 % . The finest grain size of ferrite can reach 11.6 grade . The homogeneity of wire coils is also improved .

f和有关的韧性参数中起决定性作用.在铁素体晶粒尺寸和屈服应力相同的条件下，大碳化粒子尺寸的材料具有低的裂纹断裂韧性。

The sizes of carbide particles play a leading role for determining the local fracture stress f and associated fracture toughness parameters . parameters the condition of the same ferrite grain sizes sizes and yield stress , the material with forger carbide particles exhibits lower cracked fracture toughness .

1.6%C超高碳钢热轧后经810℃×1h+750℃×1h球化处理后获得理想的球化组织，碳化物颗粒大小、分布较均匀，铁素体晶粒尺寸为3￣5μm。

A spheroidizing technology ( 810 ℃× 1h + 750 ℃× 1h ) was applied to 1.6 % C ultra-high carbon steel ( UHCS ) after hot rolling , ideal spheroidizing microstructure was obtained with uniformly-distributed grained carbides and the ferrite matrix of crystal-size 3 ~ 5 μ m.

结果表明，采用高温奥氏体的形变再结晶及过冷奥氏体的形变强化相变，可以使Q235低碳钢的铁素体晶粒细化至4-5μm，材料的屈服强度达到400MPa级，延伸率达到40%。

The results indicated that fine ferrite grains of 4-5 μ m can be achieved by deformation enhanced phase transformation of undercooled austenite in combination with austenitic re-crystallization . The yield strength exceeded 400 MPa and the plastic elongation was over 40 % .

但对退火组织的铁素体晶粒影响不大。

But effect solution La on annealed structures of steel is weakly .

GB/T4335-1984低碳钢冷轧薄板铁素体晶粒度测定法

Cold rolled low-carbon steel sheet Ferrite grain size Test methods

α-铁素体晶粒长大过程中的晶界迁移

Grain boundary migration in recrystallized Armco iron during grain growth

带钢卷取温度与铁素体晶粒长大模拟

Modeling temperature and ferrite grain growth after coiling process

可逆式冷轧对钢板织构及铁素体晶粒尺寸的影响

Effect of Reversing Cold Rolling on Texture and Ferrite Grain Size of Steel Sheet

奥氏体形变及微合金化细化铁素体晶粒的机理

On the mechanism of grain refining of ferrite grains due to austenitic transformation and microalloying

低温和大变形速率变形能细化铁素体晶粒组织。

Smaller ferrite grains can be attained at a lower deformation temperature and a greater strain rate .

铁素体晶粒超细化技术是大幅度提高低碳钢强度、韧性和节约资源的有效途径。

Ferrite grain ultrafining technology for low carbon steel could increase strength , toughness and save resource .

奥氏体未再结晶区变形对铁素体晶粒尺寸影响的数值计算

Numerical prediction of ferrite grain size with the influence of deformation in austenite non - recrystallization region

在透射电镜下观察到大部分小的铁素体晶粒呈等轴状，晶粒内的位错密度很低，有的甚至没有位错存在。

Ultrafine ferrite grains with low dislocation density or dislocation free are almost equiaxed observed from TEM micrograph .

整个过程铁素体晶粒长大不明显。

The growth of ferrite grains is hindered by the repeated nucleation in front in the whole process .

本文研究了控制轧制工艺参数对含铌与不含铌低碳钢的铁素体晶粒细化的影响规律。

The effect of controlled-rolling parameters on refinement of ferrite grain size in niobium contained steel and plain carbon steels were investigated .

在部分再结晶的下限和未再结晶区轧制后空冷，铁素体晶粒在9.45-4.44μma范围；

The ferrite grain size is in the range of 9.45-4.44 μ m after partial recrystallization and non-recrystallization zone and air cooling .