电脑桌面
添加小米粒文库到电脑桌面
安装后可以在桌面快捷访问

ASTME31995金相试验制备

ASTME31995金相试验制备_第1页
1/8
ASTME31995金相试验制备_第2页
2/8
ASTME31995金相试验制备_第3页
3/8
be decided. For a casting, a section cut perpendicular to thesurface will show the variations in structure from the outside tothe interior of the casting. In hot-worked or cold-workedmetals, both transverse and longitudinal sections should bestudied. Special investigations may at times require specimenswith surfaces prepared parallel to the original surface of theproduct. In the case of wire and small rounds, a longitudinalsection through the center of the specimen proves advanta-geous when studied in conjunction with the transverse section.4.3 Cross sections or transverse sections taken perpendicu-lar to the main axis of the material are more suitable forrevealing the following information:4.3.1 Variations in structure from center to surface,4.3.2 Distribution of nonmetallic impurities across the sec-tion,4.3.3 Decarburization at the surface of a ferrous material(see Test Method E 1077),4.3.4 Depth of surface imperfections,4.3.5 Depth of corrosion,4.3.6 Thickness of protective coatings, and4.3.7 Structure of protective coating.4.4 Longitudinal sections taken parallel to the main axis ofthe material are more suitable for revealing the followinginformation:4.4.1 Inclusion content of steel (see Practice E 45),4.4.2 Degree of plastic deformation, as shown by graindistortion,4.4.3 Presence or absence of banding in the structure (seePractice E 1268), and4.4.4 The quality attained with any heat treatment.4.5 The locations of surfaces examined should always begiven in reporting results and in any illustrative micrographs. Asuitable method of indicating surface locations is shown in Fig.1.5. Size of Metallographic Specimens5.1 The specimens to be polished for metallographic exami-nation are generally not more than about 12 to 25 mm (0...

1、当您付费下载文档后,您只拥有了使用权限,并不意味着购买了版权,文档只能用于自身使用,不得用于其他商业用途(如 [转卖]进行直接盈利或[编辑后售卖]进行间接盈利)。
2、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。
3、如文档内容存在违规,或者侵犯商业秘密、侵犯著作权等,请点击“违规举报”。

碎片内容

ASTME31995金相试验制备

确认删除?
VIP
微信客服
  • 扫码咨询
会员Q群
  • 会员专属群点击这里加入QQ群
客服邮箱
回到顶部