视力检查表视力检查表
中国机械工程学会无损检测学会
GB9445-2008(ISO9712-2005)标准要求
视力检查表
4
If the pressure on steel ingot is not enough at the direction during the process of cogging or rolling, it is easy to form a concave groove and it might become surface crack along the material fibe...
视力检查表
中国机械工程学会无损检测学会
GB9445-2008(ISO9712-2005)标准要求
视力检查表
4
If the pressure on steel ingot is not enough at the direction during the process of cogging or rolling, it is easy to form a concave groove and it might become surface crack along the material fiber in the lather forging or rolling.
4.5
Secretions the length of these cracks may equal to the length of the rolled products such as rod, late, strip and tube. This kind of cracks is usually visible.
5
Since burrs or foreign matters may exist on the roller, the material may have a slight cut, and becomes fine surface crack during the lather rolling.
6
These fine cracks may have a long length. When the steel being rolled is at high temperature, heavy oxide scales formed.
7
If the scales are rolled into the steel, surface cracks could be also formed. These cracks may lie in longitudinal, transverse or in irregular directions.
8
Seams are not one, existed on or near the surface of the steel, but also in the interior or even in the center of the body. Sometimes the number of seams in internal hole of machining parts is more than seams on the surface.
注:申请报考无损检测人员资格等级证书者应符合GB9445-2008标准(ISO9712-2005)要求的视力:无论是否经过矫正，在不小于30cm距离处，一只眼睛或两只眼睛的近
视力应能读出Times New Roman 4.5或等同大小的字母(Times New Roman 4.5点的
垂直高度，每1点为1/72in或0.3528 mm)
[中国机械工程学会无损检测学会编制•执行标准:GB/T9445-2008(等同于ISO9712-2005标准)] 文件编号: SLJC-01 版本号: 200905-01 发布日期: 2009-5-8
[中国机械工程学会无损检测学会编制•执行标准:GB/T9445-2008(等同于ISO9712-2005标准)]
文件编号: SLJC-01 版本号: 200905-01 发布日期: 2009-5-8
本文档为【视力检查表】，请使用软件OFFICE或WPS软件打开。作品中的文字与图均可以修改和编辑，
图片更改请在作品中右键图片并更换，文字修改请直接点击文字进行修改，也可以新增和删除文档中的内容。
该文档来自用户分享，如有侵权行为请发邮件ishare@vip.sina.com联系网站客服，我们会及时删除。
[版权声明] 本站所有资料为用户分享产生，若发现您的权利被侵害，请联系客服邮件isharekefu@iask.cn，我们尽快处理。
本作品所展示的图片、画像、字体、音乐的版权可能需版权方额外授权，请谨慎使用。
网站提供的党政主题相关内容(国旗、国徽、党徽..)目的在于配合国家政策宣传，仅限个人学习分享使用，禁止用于任何广告和商用目的。
浙公网安备 33021202002483