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powder feedstock
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  粉末喂料
     The result shows that the dimension of viscosity force is at least 2-3 orders bigger than gravity and inertial force's in flow analysis of MIM while the density of metal powder feedstock is 5-10 times bigger than polymer's. So the viscosity force is a primary control factor.
     在MIM流动模型基本假设研究方面,为了确定重力和惯性力对流动过程的影响强度,采用量纲分析法首次分析了喂料熔体动量方程各项的量纲,结果表明虽然金属粉末喂料的密度比聚合物大5-10倍,但在MIM流动分析中,方程的粘性力项比重力项和惯性力项大2-3个数量级以上,粘性力仍为主要控制因素。
短句来源
     Using non-Newtonian fluid power-law model and cross model, the regression analysis and curve fitting were done for the rheological data of W-Ni-Fe heavy alloy powder feedstock melt from experiment. The regression coefficients were obtained and the results was analyzed. Practical data were provided for the numerical simulation software of metal injection molding(MIM).
     使用非牛顿流体幂律模型和 Cross模型 ,对 W- Ni- Fe高比重合金粉末喂料熔体的实验测得流变数据进行回归分析、曲线拟合 ,得出各自的拟合常数 ,并对拟合结果进行了比较 ,为金属粉末注射成形分析模拟软件提供了实用的数据。
短句来源
  “powder feedstock”译为未确定词的双语例句
     The rheologic behavior of the nanocrystal W-Ni-Fe powder feedstock in MIM process was studied.
     研究了W Ni Fe纳米晶粉在注射成形中喂料的流变行为 .
短句来源
     WC-12%Co coatings were deposited by detonation-gun spraying with nano composite and conventional powder feedstock. The sliding wear resistance of the coatings was investigated using reciprocating tester under dry sliding wear conditions. The morphology,microstructure and composition change were analyzed.
     采用爆炸喷涂技术制备纳米和普通WC-12%Co涂层,用往复试验机对涂层的干滑动磨损性能进行了研究,分析了涂层磨损前后的形貌、结构及成分变化。
短句来源
  相似匹配句对
     Action Mechanism of Additives in the Feedstock of Powder Injection Molding
     粉末注射成型喂料中添加剂的作用机理
短句来源
     Rheological Characteristics of Feedstock for AlN Powder Injection Molding
     AlN粉末注射成形喂料的流变性能研究
短句来源
     Powder Coating
     粉末涂料
短句来源
     Powder electropainting
     粉末电泳涂漆
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     Optimization of Ethylene Feedstock
     关于乙烯原料优化的几点思考
短句来源
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  powder feedstock
The cold sprayed coatings show negligible porosity and oxygen contents comparable to the initial powder feedstock.
      
Phase transformations, particle breakdown, and partial decomposition occur in hydroxyapatite (HA) powder feedstock during plasma spraying.
      
Ti-Cr alloys have been laser deposited from powder feedstock consisting of a blend of elemental powders using the laser-engineered net-shaping (LENS) process.
      
That goal is achieved in this study by optimizing powder feedstock and controlling plasma parameters and the substrate temperature.
      
In summary, nanocrystalline powders show advantages as powder feedstock for thermal spraying of wear resistant coatings.
      
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The rheologic behavior of the nanocrystal W-Ni-Fe powder feedstock in MIM process was studied. The nanocrystal W-Ni-Fe powder was prepared by mechanical alloying (MA), and then was mixed with wax-based binder to form the feedstock. The effects of MA time, powder volumn and temperature on the rheologic behavior of the feedstock was discussed. The feedstock viscosity and its sensitivity to the shear rate decreased with increasing milling time. Therefore, the flowability and...

The rheologic behavior of the nanocrystal W-Ni-Fe powder feedstock in MIM process was studied. The nanocrystal W-Ni-Fe powder was prepared by mechanical alloying (MA), and then was mixed with wax-based binder to form the feedstock. The effects of MA time, powder volumn and temperature on the rheologic behavior of the feedstock was discussed. The feedstock viscosity and its sensitivity to the shear rate decreased with increasing milling time. Therefore, the flowability and compactability of the feedstock was proved by a long milling time. With the volumn content of the powder increasing, the viscosity of the feedstock increased nonlinearly according to the following formula: η=ηο/A[1-(Φ/Φ_m)]~n (where n=0.68). The viscosity of the MA powder feedstock was influenced a little by the temperature and theshear rate, so the injection temperature and rate had little influence on this kind of green parts. The sintering characteristic of this MA-prepared W-Ni-Fe powder was also studied. Results showed that milling had led to a high alloy density when sintering below liquid phase temperature, and the sintering rate was accelerated by large crystal distortion, grain refining and supersaturated sosoloid.

研究了W-Ni-Fe纳米晶粉在注射成形中喂料的流变行为,纳米晶W-Ni-Fe粉采用机械合金化(MA)的方法制备,并将此粉末与蜡基粘结剂混合以形成一种喂料,讨论了MA球磨时间,纳米晶粉末体积和温度对喂料流变性的影响,随球磨时间增加,喂料的粘度以及粘度对剪切速率的敏感性降低,因此,在较长的球磨时间下,这种粉末喂料的流动性和成形性变好,随粉末体积增加,喂料的粘度遵循公式呈非线性增加,此时n=0.68.MA粉末喂料的粘度随温度和剪切速率的变化较小,所以注射温度和注射速度的变化对这种MIM注射坯的质量影响较小,本文也讨论了采用MA制备的W-Ni-Fe纳米粉末的烧结特性,实验结果表明球磨可以导致在液相烧结温度以下合金达到很高的密度,大的晶格畸变、晶粒细化和超饱和固溶体的形成,强化了烧结工艺。

The nanocrystalline powder of W-Ni-Fe alloy used for Metal injection Molding(MIM) has been studied. The nanopowder prepared by Mechanical Alloying(MA) was mixed with a wax-based binder to form a feedstock. The effects of MA milling time, nanopowder volume fraction and temperature on the rheological behavior of the feedstock are discussed. With increase of milling time, the viscosity of the feedstock and the sensitivity of viscosity to shear strain rate decrease. Therefore, the fluidity and formalization of this...

The nanocrystalline powder of W-Ni-Fe alloy used for Metal injection Molding(MIM) has been studied. The nanopowder prepared by Mechanical Alloying(MA) was mixed with a wax-based binder to form a feedstock. The effects of MA milling time, nanopowder volume fraction and temperature on the rheological behavior of the feedstock are discussed. With increase of milling time, the viscosity of the feedstock and the sensitivity of viscosity to shear strain rate decrease. Therefore, the fluidity and formalization of this powder feedstock at the condition of long time milling become better. With increase of powder volume fraction, the viscosity of the feedstock has a non-linear increase, which follows the formula: . Here n is equal to 0. 68. The change of viscosity with temperature and shear strain rate is small for the MA powder, so the quality of these MIM products is not strongly effected by the changes of temperature and injection speed.

研究了W-Ni-Fe纳米晶粉末的注射成形(MIM)。纳米晶粉末采用机械合金化(MA)的方法制备,然后将这种纳米晶粉末与蜡基粘结剂混合以制备出喂料。讨论了MA球磨时间、纳米粉末的体积装载量和实验温度对喂料流变行为的影响。结果表明,随球磨时间增加,喂料粘度降低,粘度对剪切速率的敏感性也降低。因此,随球磨时间增加,喂料的流动性和成形性变好。随粉末装载量增加,喂料粘度呈非线性增加。喂料粘度与粉末装载量的关系为: ,其中n=0.68。粉末经球磨后,粘度变化随温度和剪切速率的变化不大。因此,注射温度和注射速度的变化对MIM产品的质量影响不大。

The rheologic behavior of the nanocrystal W-Ni-Fe powder feedstock in MIM process was studied. The nanocrystal W-Ni-Fe powder was prepared by mechanical alloying (MA), and then was mixed with wax-based binder to form the feedstock. The effects of MA time, powder volumn and temperature on the rheologic behavior of the feedstock were discussed. The feedstock viscosity and its sensitivity to the shear rate decreased with increasing milling time. Therefore, the flowability and...

The rheologic behavior of the nanocrystal W-Ni-Fe powder feedstock in MIM process was studied. The nanocrystal W-Ni-Fe powder was prepared by mechanical alloying (MA), and then was mixed with wax-based binder to form the feedstock. The effects of MA time, powder volumn and temperature on the rheologic behavior of the feedstock were discussed. The feedstock viscosity and its sensitivity to the shear rate decreased with increasing milling time. Therefore, the flowability and compactability of the feedstock were proved to be good after milling for a long time. With the volumn content of the powder increasing, the viscosity of the feedstock increased nonlinearly according to the following formula: η= η_0A[1-(φ/φ_m)] -n (where n=0.68). The viscosity of the MA powder feedstock was influenced a little by the temperature and the shear rate, so the injection temperature and rate had little influence on this kind of green parts. The sintering characteristics of this MA-prepared W-Ni-Fe powder were also studied. The results showed that milling had led to a high alloy density when sintering below liquid phase temperature, and the sintering rate was accelerated by large crystal distortion, grain refining and supersaturated sosoloid.

研究了W Ni Fe纳米晶粉在注射成形中喂料的流变行为 .纳米晶W Ni Fe粉采用机械合金化 (MA)的方法制备 ,并将其与蜡基粘结剂混合形成 1种喂料 .讨论了MA球磨时间、纳米晶粉末体积和温度对喂料流变性的影响及采用MA制备的W Ni Fe纳米粉末的烧结特性 .结果表明 :随着球磨时间增加 ,喂料的粘度以及粘度对剪切速率的敏感性降低 ,因此 ,在较长的球磨时间下 ,这种粉末喂料的流动性和成形性较好 ;随着粉末体积的增加 ,喂料的粘度遵循公式 η =η0 A[1- (φ/ φm) ]-n呈非线性增加 ,此时n =0 6 8;随着温度和剪切速率的变化 ,MA粉末喂料的粘度变化较小 ,所以注射温度和注射速度的变化对这种MIM注射坯的质量影响较小 ;在液相烧结温度以下通过球磨 ,合金可达到很高的密度 ,晶格畸变增大 ,晶粒细化 ,固溶体超饱和 ,强化了烧结工艺

 
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