热处理对LF2合金组织与性能的影响

通过扫描电镜、透射电镜、微细相分析以及力学性能测试等,研究了固溶温度、时效温度、时效时间对LF2合金的微观组织和力学性能的影响。结果表明：LF2合金是以奥氏体为基体,主要的析出相有γ´、MC、Laves相,γ´相是合金中最主要的强化相。采用固溶温度990 ℃,时效温度760 ℃,时效时间10 h的热处理制度,合金可以获得最佳的性能,此时合金的抗拉强度为1201 MPa,屈服强度为772 MPa,断后伸长率为21.8%,断面收缩率为32%。     

Eu-Chelate Construct Ultrasensitive Time-Resolved Fluoroimmunoassay-Assay of Pepsinogen I

Inrecentyears,withtheapplicationofimmuno assayinclinicalmedicine,Helicobacterpyloriinfec tion,gastriccarcinoma,duodenalulcer,gastritisand severeatrophicgastritisareoftendiagnosedwithnon endoscopicmethods,suchaspepsinogen(PG),in cludingpepsinogenI(PGI),andpepsinogenII(PGII),whichdifferintheirstructuralandimmuno logicalcharacteristics[1～8].Theyaresynthesizedinthe gastricmucosaandsecretedintothegastriclumen,wheretheyareconvertedtotheactiveenzymeunder acidicconditions[9,10].Inthecurrentstudy…