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首页> 外文会议>2003 International Thermal Spray Conference Vol.2; May 5-8, 2003; Orlando, Florida, USA >Particle Temperature and Velocity Characterization in Spray Tooling Process by Thermal Imaging Technique
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Particle Temperature and Velocity Characterization in Spray Tooling Process by Thermal Imaging Technique

机译：热成像技术在喷涂加工过程中的颗粒温度和速度表征

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摘要

A two-color imaging pyrometer system is employed to examine twin wire arc spray gun used in Spray Tooling Process. Key aspects analyzed in this study include particle temperature, particle velocity, and particle distribution. The influence of process parameters such as gas flow rate, type of gas (N_2, and air), voltage and current, as well as, spray cap design has been studied. Influence of a super atomizer called the arc jet has also been investigated. The measurements were taken at 80 mm, 160 mm and 200 mm from the gun tip. Finally, the influence of the material on the spray characteristics has been examined. The material list includes 0.8% carbon steel, 0.8% Carbon steel with B, stainless steel, Molybdenum, Ni, Ni-Al and Copper. The type of gas used for atomization significantly influences the particle temperature and velocity. Lowest temperature is observed with nitrogen gas and the highest temperature with the arc jet. Arc jet also produced particles with significantly higher velocity. The flow rate did influence the particle velocity where as temperature wasn't affected noticeably. The wire material has considerable impact on the particle temperature and velocity. Lower melting point alloys showed higher temperature whereas the velocity has complex dependence on the density and viscosity of the material. Cap type affects the temperature and velocity of the particle. As cap opening increases the temperature and velocity decrease.
机译：采用双色成像高温计系统检查喷涂工具工艺中使用的双丝电弧喷枪。本研究中分析的关键方面包括粒子温度，粒子速度和粒子分布。研究了工艺参数如气体流速，气体类型（N_2和空气），电压和电流以及喷头设计的影响。还研究了一种称为电弧射流的超级雾化器的影响。在距枪头80毫米，160毫米和200毫米处进行测量。最后，检查了材料对喷雾特性的影响。材料清单包括0.8％碳钢，含B的0.8％碳钢，不锈钢，钼，Ni，Ni-Al和铜。用于雾化的气体类型会显着影响粒子的温度和速度。用氮气观察到最低的温度，而用电弧喷射观察到最高的温度。电弧喷射还产生了明显更高速度的颗粒。流速确实会影响粒子速度，而温度不会受到明显影响。线材对粒子的温度和速度有很大影响。较低熔点的合金显示较高的温度，而速度对材料的密度和粘度具有复杂的依赖性。瓶盖类型会影响颗粒的温度和速度。随着盖的打开，温度和速度降低。

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