By rotating viscometer, the relationships among the viscosity, solidification temperature, activation energy of slags, R and BI are studied. 利用旋转黏度计,全面研究连铸保护渣的黏度、凝固温度和黏性活化能与碱度、综合碱度之间的关系。
The rules of heat exchange on the interface of casting and model were set up, and the solidification temperature fields were simulated. 研究铝铸锭凝固边界热交换的变化规律及数学模型,并对不同浇注温度下凝固过程的温度场进行模拟。
Concrete solidification temperature changes in the process of analysis 大体积混凝土凝固过程中的温度控制
The inspecting and controlling meter of micro-wave solidification temperature and its driving program are designed. 设计胶粘剂微波固化温度监控仪及其驱动程序。
Rheological behaviour of cast steel at solidification temperature 铸钢在凝固区的流变行为
Method of raising precision and test verification of computer to solidification temperature field with casting 铸件凝固温度场计算机实测验证及提高精度的方法
Casting speed of aluminium alloys can be probably increased by vertical twin-roll thin-strip casting, especially that with large solidification temperature range. 采用立式双辊法可望进一步提高铝合金的浇铸速度,特别是高牌号铝合金的浇铸速度;
Collection and post-processing of data of casting solidification temperature field 铸件凝固温度场计算机采集及其后处理
The results show that Ti content has a very important effect on the amount of the eutectic in the as-cast superalloys because Ti is segregated at interdendritic region and enlarges the range of solidification temperature. The amount raises strongly as Ti level is increased. 结果表明,Ti元素偏析于枝晶间并扩大了合金的凝固温度范围,从而显著影响铸态合金中的共晶数量,随着Ti含量的增加,合金中的共晶数量大幅度增加。
By the self-regulating and optimized computing the effective thermal diffusivity using numerical simulation and DFP optimization method, the simulation result of solidification temperature field is made accordant with the measured temperature, thereby the formulae expressing the effective thermal diffusivity being changed with the temperature are finally obtained. 采用数值计算和DFP优化技术,通过对待测液态合金有效热扩散率的优化计算使铸件凝固温度场计算结果与实测温度场趋于一致,最终获得该合金液的有效热扩散率随温度变化的规律。
Testing System of Alloys 'Transient Solidification Temperature Field 合金瞬态凝固温度场测试系统
A more precise model to calculate casting solidification temperature field has been built. 本文创建了一种较为准确的计算铸件凝固温度场的方法。
Under the present experimental conditions, the viscosity, solidification temperature and activation energy of mold powder all decrease with increasing BI and, meanwhile, the effect of BI on viscous characteristics of mold powder gradually weakens. 在本实验渣系条件下,随着综合碱度的增大,连铸保护渣的黏度、凝固温度和黏性活化能均逐渐减小,并且随着综合碱度的增大,其对黏性特征的影响作用逐渐减弱。
The paper introduces the experimental teaching case of the measurement of metal solidification temperature field. 介绍材料成型与控制专业材料成形原理中测定金属凝固温度场实验的教学案例。
This article put forward the detailed project of collecting the data of Alloys'Transient Solidification Temperature Field, according to the characteristics of this process. 本文针对合金瞬态凝固过程温度场的特点,详述了对该过程中合金液内温度场进行测试的方案。
The methods, software and recent application of computer simulation in liquid formation, including the filling, solidification temperature field, stress field, microstructure transformation, as well as plastic formation and jointing formation are reviewed. 综述了材料液态成形中充型过程、凝固过程、应力场、凝固组织形成过程及材料塑性成形、连接成形工艺计算机模拟的技术、模拟软件及应用现状;
Experiment Teaching of Measuring Metal Solidification Temperature Field 测定金属凝固温度场的实验教学
The microstructure refinement is related to the start temperature of the discharging, the optimum start temperature is just below the solidification temperature of the steel. 凝固组织的细化效果与脉冲放电处理的开始温度有关,在略低于钢的开始凝固温度进行放电处理效果最佳,可获得均匀的凝固组织。
In the high speed casting the melting temperature, viscosity and solidification temperature of the mould flux should be properly reduced and the melting rate and Al 2O 3 absorption rate be increased. 高拉速连铸工艺要求连铸保护渣的熔化温度应适当降低、熔化速度应适当增大、粘度适当减小、凝固温度应适当降低、Al2O3吸收速率应适当增大。
The stress-strain relation for cast low alloy carbon steel at solidification temperature has been examined by the authors 'own designed apparatus for rheological properties measurement. 用自行设计的流变性能测定仪测量了624钢(32MnNiMoCu)在凝固区内的应力、应变关系。
The finite differential method was applied to develop a simulation software for solidification temperature field in continuous casting. 采用有限差分方法,自行开发了连铸过程的凝固温度场模拟软件。
The results were shown as follows: ( 1) In Sn-Ag lead-free solder alloys, under the interaction of multi-composition, the addition of the element In and Bi can decreases the solidification temperature obviously. 在Sn-Ag合金系中,在多组元的交互作用下,In、Bi能显著降低合金的平均凝固温度,Sb能提高接头拉伸和剪切强度,RE则会降低接头拉伸和剪切强度;
The results show that this volume fraction increases with increasing initial solidification temperature. 结果表明:随着初始凝固温度增加,α(Al)相所占的比例增大。
However, it is easy to form porosities during traditional die casting because of its wide solidification temperature interval. 但是其凝固温度范围宽,在传统压铸生产时容易形成缩松。
It was shown that with the increase in viscosity and solidification temperature of mold flux, the thermal conductivity and the heat flux density of flux were reduced, and the thermal resistance was increased. 结果表明:增加保护渣的粘度、提高保护渣的凝固温度,结晶器与坯壳之间渣膜的传热系数和热流密度都减小而热阻增加。
The melting property, viscous characteristics and inclusion absorbability of the mould flux can be predicted with the aids of the relationship between the melting temperature, solidification temperature, Al 2O 3 absorbability and chemical composition. 利用熔化温度、凝固温度、粘度、Al2O3吸收速率与化学成分之间的关系,可以预测连铸保护渣的熔化性能、粘性特征和夹杂物吸收能力。
Solidification Temperature of Concasting Mold Fluxes 连铸结晶器保护渣的凝固温度
As the content of particles increased, it widened the solidification temperature range. 随着颗粒含量的增加,使材料的凝固温度区间变长。
The results indicated that the addition of particles lowered the start solidification temperature; the phenomenon meant that SiC particles failed to stimulate nucleation. 结果显示:颗粒的加入使凝固起始温度降低,表明SiC颗粒不促进α(Al)相的形核。
In the aluminum alloy melt solidification process, the outside pressure and the solidification temperature range have some influence on using the pinhole degree rank method to examine the hydrogen content in aluminum alloy melt. 铝合金液凝固过程中,外压及合金的凝固温度范围的大小,对使用针孔度等级法检测铝合金液含氢量有一定影响,外压小时,检测较为精确。