公开(公告)号：US5967660A

公开(公告)日：1999-10-19

申请号：US996248

申请日：1997-12-22

申请人： Edward Akpan ,  Jeff Lee Branson ,  Blake Ross ,  John Loncke ,  Long T. Dinh ,  Richard Piekos

发明人： Edward Akpan ,  Jeff Lee Branson ,  Blake Ross ,  John Loncke ,  Long T. Dinh ,  Richard Piekos

IPC分类号： G01M99/00 ,  G01N3/60 ,  F27D19/00 ,  G01M15/00

CPC分类号： G01M99/002 ,  G01N3/60 ,  G01N2203/0064

摘要： A method and apparatus of providing accelerated thermal fatigue testing of an engine component, comprising: (i) impinging one or more torch flames directly on a selected area of the test specimen (i.e. metallic engine cylinder head) to heat such area to a critical test temperature that exceeds the normal maximum loading temperature of the specimen in normal use by about 10-25%, and holding such temperature for a period of 0.01-2.0 minutes; (ii) at the end of the holding period (ie. Water jet water in head jacket, or air in ports) quenching the heated area of the test specimen to a temperature that is about 75% below that of the normal maximum loading temperature and holding such quenching temperature for about 1-3 minutes; and (iii) repeating steps (i) and (ii) until a crack is induced in the test specimen while recording the history of temperature and time involved in such repeated steps.

摘要翻译： 一种提供发动机部件的加速热疲劳试验的方法和装置，包括：（i）将一个或多个割炬火焰直接撞击在所述试样（即金属发动机气缸盖）的选定区域上，以将该区域加热至临界试验 在正常使用中超过正常最大负载温度的温度约为10-25％，并保持该温度为0.01-2.0分钟; （ii）在保存期结束时（即，头套中的喷水，或端口中的空气）将试样的加热区域淬火至比正常最大负载温度低约75％的温度，以及 保持这样的淬火温度约1-3分钟; 和（iii）重复步骤（i）和（ii），直到记录试验样本中的裂纹，同时记录这种重复步骤所涉及的温度和时间的历史。