The results show that the main reason is many little cracks(white spot) exist,and heavy reticulation structure,inclusion,coarse grain and side decarburized stucture.
结果表明,其发生断裂的主要原因是存在较多的小发纹(白点),加之较严重网状组织、夹杂物、晶粒粗大和边部脱碳组织,在机械加工力的共同作用下,导致轻轨发生断裂。
This paper introduces the effect of coarse grains on the ultrasonic inspection of 40CrMo steel used for crankshaft.
由于42C rM o曲轴锻造坯组织晶粒粗大,影响了钢中缺陷的超声波定性探伤效果。
This paper introduces the effect of coarse grains on the ultrasonic inspect ion of 42CrMo steel used for crankshaft.
由于42CrMo曲轴锻造坯组织晶粒粗大,影响了钢中缺陷的超声波定性探伤效果。
The effects of cold rolling processes on coarse grains of aluminium foil blanks in annealing are studied.
试验研究了变形程度、道次加工率、润滑等对铝箔坯料退火产生粗大晶粒的影响。
The coarse grain in cast strip is produced on the condition that cool speed is not fast enough to overcool aluminum melt in whole cast area, and only provide proper temprature gradiant to keep cellular grain growing up.
铸轧区内铝液与铸轧辊接触瞬间，当铸轧辊冷却强度不足以使整个断面铝液同时产生较大的过冷，而仅能保持胞状晶生长所需的液体温度梯度时，铸轧板就会出现粗大晶粒；根据传热学原理，分析了具体生产条件，提出增大铸轧辊冷却强度、降低前箱温度以及添加铝钛硼丝等防止铸轧板产生粗大晶粒的措施。
The paper is to solve the problem of the coarse grain occurred in the recrystallization annealing process of the 3003 aluminum alloy sheet.
为了解决3003铝合金冷轧板进行再结晶退火时出现粗大晶粒的问题,利用光学显微镜观察在同一温度下退火,随着保温时间的延长3003铝合金板组织的变化情况,确定了3003铝合金板的最佳退火保温时间。
A 2-D cellular automaton(CA) model is developed to simulate nucleation,growth and coarsening of grains during the solidification of a certain material,as well as the grain coarsening after solidification.
建立了模拟凝固进行时晶粒成核、生长与粗化过程以及凝固完成后晶粒粗化过程的二维元胞自动机模型,模型中将原子在固/液界面、晶界面的迁移过程以概率的方式表现在元胞网格演化的规则中。
The principles of dissolution precipitation of second phase particles and autenite grain coarsening were studied and the solubility product of NbC in austenite as function of temperature was evaluated.
经试验确定钢的晶粒粗化温度 (t GC)为 110 0℃ ,t GC与第二相粒子的全固溶温度 (ts)之间存在一定的线性关
A directly etching test of austenitic grains wasconducted to show the effects of different V and Nb contents on austeniticgrain coarsening, thus making provision for a rational choice of austenizingtemperature in the rolling process of the microalloyed V--Nb steel.
通过对奥氏体晶粒的直接腐蚀显示,测出了不同 V,Nb 含量对奥氏体晶粒粗化的影响,为 V,Nb 复合的微合金化钢在轧制时奥氏体化温度的合理选择提供了依据。
Technology for avoiding coarse grain in aluminum alloy extrusion plates
挤压铝合金板材避免晶粒粗大的工艺
Cause Analysis and Strategy of Coarse Grain on Cast-rolling Strip
铸轧带坯晶粒粗大的原因分析及对策
Investigation the Relationship Between Welding Hot Crack and Grain Size;
焊接热裂纹与母材晶粒粗大的关系讨论
It was revealed that the fracture of the bolt came from its poor quality including coarse grains and network-like distribution of ferrite along the grain boundaries of original austenite.
结果表明,材质不良——晶粒粗大、素体沿晶界呈网状分布是导致螺杆断裂的主要原因。
Effect of abnormally large prior-austenite grains on the presence of surface intergranular cracks
异常粗大的奥氏体晶粒对表面晶间裂纹的影响
GRAIN GROWTH MODEL OF INCONEL 718 ALLOY FORGED SLAB IN REHEATING PROCESS PRIOR TO ROUGH ROLLING
Inconel 718合金方坯粗轧加热过程晶粒长大模型
Formation of the coarse grains in annealed low carbon steel sheets by EBSD analysis
低碳钢退火板中粗大晶粒成因的EBSD分析
The Method of Enlarging Crystal Granule in the Experiment about Purifying Crude Bluestone;
粗硫酸铜提纯实验中增大硫酸铜结晶颗粒的方法
Serious mischcrystal and extremely coarse austenite grains lead to the production of this kind of abnormal structure.
产生这种组织的主要原因是50车轴钢锻造后混晶现象严重及存在特别粗大晶粒。
Microstructure of Coarse-grained BaTiO_3 Ceramics and Its Effects on Electric Properties
粗晶粒BaTiO_3陶瓷的微观结构及电学性能
Phase field modelling of grain growth in polycrystalline material
多晶材料晶粒生长粗化过程的相场方法模拟
Fine structure in coarse grain region of fine grained titanium alloy
细晶粒钛合金焊接接头粗晶区的精细结构
austenite grainsize determination
奥氏体晶粒大小测定法
Fem Simulation and Predication of Grain Size in Roughing Roll for Bar Steel;
棒材粗轧过程的有限元模拟和晶粒尺寸预报
Study on micro-structure of coarse-grained polycrystalline diamond compact
粗颗粒聚晶金刚石复合片显微结构的分析
Abnormal Grain Coarsening of Laser Surface Remelting Rapidly Solidified TA15 Titanium Alloy
TA15钛合金激光表面重熔快速凝固晶粒异常粗化
Influence of elevated temperature holding time on microstructure and properties in heat affected zone of fine grained titanium alloy
高温停留时间对细晶粒钛合金粗晶区组织的影响
GRAIN BOUNDARY MIGRATION IN RECRYSTALLIZED ARMCO IRON DURING GRAIN GROWTH
α-铁素体晶粒长大过程中的晶界迁移