US4450008A 此为奥氏体不锈钢 的美国专利公开说明书对比文件 谁能帮我找出来 提供给我

US4450008A 此为奥氏体不锈钢 的美国专利公开说明书对比文件 谁能帮我找出来 提供给我

http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&co1=AND&d=PTXT&s1=4450008.PN.&OS=PN/4450008&RS=PN/4450008

你自己打开该网址就可以看到了.
该美国专利的摘要如下:
Abstract
The present invention relates to a fully austenitic, nonmagnetic stainless steel which maintains the carbon concentration of the final steel near the solubility limit for carbon in the steel and adds columbium in an amount sufficient to stabilize the steel by columbium's preferential scavenging of carbon over chromium. This preferential scavenging substantially eliminates chromium carbide formation at grain boundaries in the solid solution of the final stainless steel product. A highly preferred stainless steel consists essentially of, by weight: 16-20% Manganese, 12-15% Chromium, 5.0% Molybdenum max., 2.5% Nickel max., 1.0% Copper max., 0.75% Silicon max., 0.2-0.5% Nitrogen, 0.04% Phosphorus max., 0.01% Sulfur max., 0.035% Carbon max., Columbium at a concentration of at least ten times the Carbon concentration, and the remainder being essentially Iron with incidental impurities.

关于美国专利问题你可以咨询美国华盛顿知识产权公司北京代表处.参考资料：www.dcpatent.cn