熔池

• In this thesis , ansys , which is finite element simulation software , was used to numerically simulate the temperature field and stress field in the sls of 316 stainless steel . in addition , this software was also used to qualitatively simulate the effect of ultrasonic vibration on the melting pool
  本文利用有限元分析软件ansys ,针对316不锈钢激光烧结温度场、应力场进行了数值模拟;同时,对外加超声振动对熔池的影响进行了定性的模拟研究。
• Specially for welding of thin and mid - thickness steel ; suitable for mag co2 welding of low carbon steel and low alloy steel inner wire feeder structure ; zx5 series thyristor dc arc welder ac arc welder with single phase moveable coil for sma mma welding ; suitable for welding low carbon steel , low alloy steel ; suitable for welding mid - thickness steel
  可用于所有牌号焊条的直接手工电弧焊接引弧容易，无须用户调节可远距离调节焊接电流，便于焊工操作焊机动特性好，性能柔和，电弧稳定焊接熔池平静，飞溅小，不咬边，焊缝成形美观。
• In this thesis , the response of melting pool of laser sintering under ultrasonic vibration was investigated . the results indicate that forced vibrations of the melting metal in the melting pool occurred under the ultrasonic vibration leading to the decrease of the viscosity of melting metal , which promotes the infiltration between melting pool and powder
  关于激光烧结熔池在超声振动下的响应,模拟结果显示,熔池中的熔融金属在超声振动的作用下产生受迫振动,降低了熔融金属的粘度,促进熔池与基板和粉末的浸润。
• The coupled turbulent flow field and temperature field are simulated by finite element method ; the influence of casting speed on the turbulent flow field and temperature field in the melting bath and the interaction between those two field are analyzed ; the variation tendency of the heat flux intensity between the melting bath and casting roll and law of variation with changes of casting speed in the process of solidification are given ; a comparison between the simulation results and experimental results demonstrates their good agreement ; and the mechanism of the heat flux variation is identified by analysis on the temporature gradient and development of solidification within the melting bath and its influence on the variation of the heat flux intensity
  采用有限元法模拟了双辊铸轧不锈钢过程的流热耦合问题;分析了铸轧速度对熔池内流场、温度场的影响以及流场与温度场之间的相互影响;给出了凝固过程中熔池与铸轧辊之间的热流密度变化趋势及随铸轧速度的变化规律,并把此模拟的结果与试验的结果相比较,吻合较好;通过熔池内温度场及温度梯度分析了熔池内凝固的发展及其对热流密度变化的影响。
• Based on the analysis about the influences of the mixing time , the penetration ratio of injected powder and the residence time of injected powder in the bath on the desulphurization process , a mathematical model which taken these three parameters into account was developed to simulate the desulphurization rate of hot metal by co - injection of magnesium - cac2 mixture , and the coupling effect between magnesium and cac2 was discussed
  在具体分析熔池均混时间、粉剂穿透比及粉剂停留时间这3个基本参数对脱硫过程影响的基础上，建立了能体现这3个参数影响的模拟铁水喷吹镁粒和碳化钙复合粉剂脱硫处理的数学模型，并讨论了两种粉剂在脱硫过程中的耦合效果。
• In this paper , a series of experiments are carried out with dlms for nickel - based metal powder materials , and the effect of process parameters in sample quality was investigated and analyzed . the main works are as following : ( 1 ) the effect mechanism of laser in metal powder and the nucleation mechanism are analyzed . ( 2 ) the process parameters that affect the quality of sintering parts are investigated and the way how they affect is clear
  本文基于直接激光金属烧结成形技术,通过对镍基高温合金直接激光烧结成形的研究,从工艺角度研究某型号镍基高温合金的激光直接烧结成形性能以及工艺参数对烧结制件性能的影响,所完成的工作主要有: ( 1 )分析材料与激光相互作用的机理及熔池的动态快速凝固过程。
• The calculated results are in agreement with the measured ones , indicating that according to the flow rate and composition of the exhaust gas and the mass and the carbon content of the liquid iron , the carbon content of steel bath can be dynamically determined ; with the aid of thermodynamic equilibrium analysis , the dynamic variation of temperature of the steel bath can be forecasted from the dynamic carbon content and the data from the exhaust gas analysis system
  该模型计算结果与检测结果吻合较好，这表明：通过烟气流量、成分及铁水质量和初始碳含量可动态地确定熔池中的碳含量；以动态确定的碳含量为基础，结合炉气分析数据，再经热力学平衡分析，可预测熔池温度的动态变化。