Invention Grant
- Patent Title: Methods to determine light elements content of steel and alloys
- Patent Title (中): 确定钢和合金轻元素含量的方法
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Application No.: US12740953Application Date: 2008-10-24
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Publication No.: US08411817B2Publication Date: 2013-04-02
- Inventor: Martha Teresa Pantoja De Oliveira Castro , Cristina Maria Assis Lopes Tavarez da Mata Hermida Quintella , Joao Nazareth Lafayette De Mello Mac-Culloch
- Applicant: Martha Teresa Pantoja De Oliveira Castro , Cristina Maria Assis Lopes Tavarez da Mata Hermida Quintella , Joao Nazareth Lafayette De Mello Mac-Culloch
- Applicant Address: BR Rio de Janeiro BR Salvador
- Assignee: Petroleo Brasileiro S.A.,Universidade Federal da Bahia
- Current Assignee: Petroleo Brasileiro S.A.,Universidade Federal da Bahia
- Current Assignee Address: BR Rio de Janeiro BR Salvador
- Agency: Nixon & Vanderhye P.C.
- Priority: BR0706233 20071031
- International Application: PCT/BR2008/000318 WO 20081024
- International Announcement: WO2009/055886 WO 20090507
- Main IPC: G01N23/223
- IPC: G01N23/223
Abstract:
The present invention refers to the process of determination of light elements, i.e., molar mass lower than 23, within inorganic materials, by means of spectra analysis between 5 keV and 22 keV, obtained from these materials when exposed to X radiation. Particularly, the invention refers to the direct determination of carbon content in steel and alloys. According to the invention process, the inorganic materials are exposed to X radiation and the spectra are organized as a matrix and mathematically processed using chemometric tools properly selected.
Public/Granted literature
- US20100284512A1 PROCESS TO DETERMINE LIGHT ELEMENTS CONTENT OF STEEL AND ALLOYS Public/Granted day:2010-11-11
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