钢厂
电工钢中柱状晶尺寸及退火工艺对{100}织构的影响
利用EBSD技术研究了电工钢中不同的柱状晶尺寸及退火工艺下{100}织构的演变规律。结果表明,初始晶粒尺寸的影响最显著。细小柱状晶热轧后经过常化处理,组织已均匀,但中心层有强{100}织构。粗大柱状晶中{100}织构的遗传性强,常化及中间退火后,中心层仍有粗大的以{100}取向为主的晶粒;脱碳退火后才能完成组织均匀化和织构梯度的弱化。常化时的升温速度也对织构演变存在影响,低的升温速度有利于{100}织构的保留,但升温速度的影响没有初始晶粒尺寸及退火次数的影响显著。细小柱状晶样品经过热轧及三次退火工艺适合制备取向电工钢。 Evolution of {100} texture of different columnar grains and annealing process was investigated in electrical steels with the help of EBSD technique.The results show that the effect of initial grain size is the strongest.The initial fine-grained specimen shows uniform microstructure after the normalizing process,while {100} grains appear preferentially in the central layer of sheets.The heredity of {100} texture in the initial coarse-grained specimen is more significant.{100} mainly-oriented coar...
Fe-6.5%Si高硅钢的性能及制备技术
Fe-6.5%Si高硅钢是一种具有高磁导率、低矫顽力和低铁损等优异软磁性能的合金,但是其室温脆性和低的热加工性能严重影响了其在工业领域的应用。综述了Fe-6.5%Si高硅钢的性能,评述了合金的改性法、特殊轧制法、快速凝固法、沉积扩散法、粉末冶金法等制备工艺。 It is well known that 6.5%Si high silicon steel is one kind of soft magnetic materials with higher re-lative permeability,lower coercive force and iron loss than those of conventional industrial silicon steel.However,their room-temperature embrittleness and poor workability limit their practical applications in the industry.The pre-paration technique such as modification treatment on alloy,special rolling,rapid solidification,CVD and powder me-tallurgy is reviewed.
冷轧压下量对取向硅钢极薄带显微组织的影响
观察了取向硅钢极薄带经冷轧至不同厚度,并经过不同工艺热处理后的显微组织及亚结构。结果表明:冷轧压下量越大,显微组织中位错密度越高,冷变形组织越多,等轴晶粒越少;增加冷轧压下量可以使试样的再结晶温度降低,当钢带厚度为0.08 mm时,在650℃退火时就能发生明显的再结晶。 Microstructure and substructure of the grain oriented ultra-thin silicon steel sheets is analyzed,which are rolled down to different thickness and treated with different heat treatment process.The result shows that there are higher dislocation density,more cold deformation structure and less equiaxed crystal grain in microstructure of the steel sheets with more cold rolled reduction.Increase of cold rolled reduction will decrease recrystallization temperature,and when thickness of the steel shee...
化学气相沉积法制备6.5%Si高硅钢的研究
采用化学气相沉积(CVD)渗硅处理工艺连续制备6.5%Si高硅钢,具有优质的软磁性能,通过理论研究化学反应并且用简单的试验设备做进一步的探讨。根据试验的结果对连续制备6.5%Si高硅钢的CVD工艺构造提出全面、有效的建议,实现制备6.5%Si高硅钢系统。 CVD method for continuously manufacturing 6.5%Si Steel Sheet has excellent soft magnetic.Carried out a theoretical study of related chemical reaction and performing basic research with a simple test apparatus.Based on the results,finally proposed an overall process configuration to realize such a production-CVD method for continuously manufacturing 6.5%Si Steel Sheet.
大压下率冷轧无取向硅钢织构演变及性能
组织和织构是影响无取向硅钢性能的重要因素。为改善产品性能，研究了冷轧压下率（71.7%～87.0%）对高牌号无取向硅钢组织、织构、磁性能和力学性能的影响。结果表明，随冷轧压下率的增加，退火晶粒平均尺寸先减小后增大；高斯和立方织构强度减弱，γ纤维织构增强，α纤维织构转变为较强的α*（{h, 1, 1}〈1/h, 1, 2〉）织构，并随冷轧压下率的增加而增强，同时其峰值逐渐向{111}面移动；工频铁损P1.5/50、高频铁损P1.0/400和磁极化强度J5000同时降低，屈服强度变化不大，表面硬度逐渐增加。当冷轧压下率由84.7%增至87.0%、厚度减至0.30 mm时，高频铁损降幅是工频铁损的11倍，表面硬度增幅变大。以上研究成果对硅钢减薄后织构及组织的优化提供了很好的指导。 Microstructure and texture are critical factors on non-oriented silicon steel properties. In order to improve product properties, this paper studied the effect of cold rolling reduction rate（71.7%-87.0%） on microstructure, texture, magnetic properties and mechanical properties of high-grade non-oriented silicon steel. The results show that with the increase of cold rolling reduction rate, the average size of annealing grain decreases first and then increases. The intensity of Goss and λ fiber te...
取向硅钢连续退火的工艺与设计
分析了影响脱碳效果和结晶行为的各种要素及其相互制约关系,提出了Hi-B连续退火工艺曲线,总结得出快速加热及合理稳态气氛是实现工艺制度的关键。结合实际工程,介绍了在连续退火炉设计中快速加热和气氛设计的考虑方法,并指出随着Hi-B产品的发展,如何改进这些方法将是连退工程研发的方向之一。 The factors which affect decarbonization and crystallization and the mutual restriction between them were analyzed.A complete continuous annealing process for Hi-B was put forward.As a result,the rapid heating and the proper steady atmosphere were two important factors.According to an actual project,the consider methods for designing rapid heating and proper steady atmosphere were introduced,and it is pointed that with the development of Hi-B technique,how to improve these techniques would be on...
取向硅钢常化水冷温度模型及控制方法研究
取向硅钢常化工序主要采用现场实测带钢温度的方式测定冷却速率，并通过稳定冷却水温、调整冷却水量及喷梁运行数量等方式保证合理的冷却速率，给常化工艺设计和生产带来诸多不便。通过对常化工艺水冷过程带钢的传热分析求解，在建立带钢水冷温度模型的基础上，研究了不同冷却工艺参数对带钢温度及冷却速率的影响规律以及冷却工艺的交互作用结果。结果表明：模型计算结果能够较好地反映取向硅钢在常化水冷过程中的温度及冷却速率的变化，其计算误差为0.80%～4.11%;在特定取向硅钢厚度规格和常化工艺下，随着常化冷却水量及有效冷却长度的增加，带钢水冷温度及冷却速率与呈非线性变化；常化水冷工艺主要通过调控带钢与冷却水之间热交换量和交换时间实现对带钢温度的控制，实际生产中需综合考虑机组速度、冷却水量及有效冷却长度之间的交互作用，选定喷梁投入数量和冷却水量以获得稳定的冷却速率。 The cooling rate of normalization process mainly determined by measuring the grain oriented silicon steel strip temperature on site, and ensures the cooling rate by stabilizing the cooling water temperature, adjusting the cooling water volume and the operation quantity of spray beam, which brings inconvenience to the normalization process design and production. Based on the heat transfer of strip in the water cooling section of normalization process, the water cooling temperature model for the n...
