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November 2010

TGAsia@IPC.ORG

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Subject:
From:
苏勇亮 <[log in to unmask]>
Reply To:
Asia Committe Task Group Forum <[log in to unmask]>, 苏勇亮 <[log in to unmask]>
Date:
Wed, 3 Nov 2010 08:57:47 +0800
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text/plain
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text/plain (33 lines)
那个开裂的地方不应该判定为锡裂;
最好做个断面,如果确认在裂开的地方,边缘是光滑的情况,日语中叫“引け巣"。
这种情况信赖性评价没有异常的话是没有问题的。
如果裂开的地方是比较有棱角的话就是龟裂,会直接影响强度,可判定为不良。

以上,请指教

-----邮件原件-----
发件人: TGAsia [mailto:[log in to unmask]] 代表 Jessy Lai
发送时间: 2010年11月2日 下午 7:41
收件人: [log in to unmask]
主题: [TGAsia] 答复: 过波峰炉产生锡裂原因

 

各位高手:

  请看下图,元件过波峰炉后产生锡裂,请问是什么原因造成?




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