Continuous extrusion of a commercially pure titanium powder via the Conform process
Continuous extrusion of a commercially pure titanium powder via the Conform process
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DOI：
10.1080/02670836.2016.1245256
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发表时间：
2017-05
影响因子：
1.8
通讯作者：
Ben Thomas;F. Derguti;Martin Jackson
中科院分区：
文献类型：
--
作者：
Ben Thomas;F. Derguti;Martin Jackson
这是第一次，冷商业纯钛粉可以通过一个标准的符合机挤压成完全致密的丝与细再结晶显微组织。晶粒尺寸已被证明随着轮速的增加而减小，同时拉伸强度也相应增加。线材挤出物的宏观结构表现出特征流动模式，具有由平均晶粒尺寸和分布的差异限定的几个区域。该过程的有限元建模显示了粉末进料Conform的特征宏观结构的形成。该工艺是连续的，使用标准设备，不需要粉末预热或惰性气体预热，为长截面钛轧机产品的真正成本降低奠定了基础。
It is shown for the first time that cold commercially pure titanium powder can be extruded through a standard Conform machine into fully dense wire with a fine recrystallised microstructure. The grain size has been shown to decrease with increasing wheel speed with an associated increase in tensile strength. The macrostructure of the wire extrudate exhibits a characteristic flow pattern with several regions defined by differences in average grain size and distribution. Finite-element modelling of the process shows the formation of the characteristic macrostructure from powder fed Conform. The process is continuous, utilises standard equipment and does not require powder preheating or inert gas shrouding providing a footing for a true cost reduction in long-section titanium mill product.