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Microstructure has a direct impact on material behavior under test and real life conditions.  To improve material properties, metal parts, e.g. end mills, are often heat treated while being made.

  microstructure ΢¹Û×éÖ¯ / heat treat ÈÈ´¦Àí / end mill ϳµ¶
3Â¥2014-03-10 01:24:59
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Columnar crystals increase creep, fatigue, and thermal crack resistance, as well as electrical conductivity and signal transmission.  To the extent cutting tools already benefit from being coated with vapor-deposited TiCN [1], future research into columnar crystal cultivation holds even greater promise for electronics [2,3] and other industries.  For example, a patent [4] already exists for making columnar crystal scintillators by vapor deposition.

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A novel cultivation method is presented for growing columnar crystals whose promise of higher creep, fatigue, and thermal crack resistance have already by realized by cutting tool manufacturers [1].   Methods more efficient than vacuum induction [5] are applied to promote directional solidification processes [6] responsible for columnar crystal formation.

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[1] Tangaloy 2007 Catalog
  http://www.tungaloy.co.jp/common ... g/e/01_grades_e.pdf

[2] "the PCB Magazine"
  http://www.magazines007.com/emag ... nd/PCB-June2013.pdf

[3] Shengbei PCB website
  http://www.shenbeipcb.com/en/ind ... tid=3&id=87

[4]  US20130186943A1  Patent
  
[5] MODIFICATION OF PURE Al AND AlSi2 ALLOY PRIMARY STRUCTURE WITH USE OF ELECTROMAGNETIC STIRRING METHOD
  http://www.imim.pl/files/archiwum/Vol3_2013/55.pdf

[6] ¶¨ÏòÄý¹ÌÖÆ±¸¶à¾§¹èÖù×´¾§µÄÑо¿
  http://d.wanfangdata.com.cn/periodical_zsdxxb2009z2029.aspx
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4Â¥2014-03-10 04:13:06
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