Application of Rare Earths in Oil Country Tubular Goods

ＡｐｐｌｉｃａｔｉｏｎｏｆＲａｒｅＥａｒｔｈｓｉｎＯｉｌＣｏｕｎｔｒｙＴｕｂｕｌａｒＧｏｏｄｓＬｉｎＱｉｎ（林勤），ＹａｏＴｉｎｇｊｉｅ（姚庭杰），ＬｉｕＡｉｓｈｅｎｇ（刘爱生）ＣｈｅｎＮｉｎｇ（陈宁），ＹｅＷｅｎ（叶文），ＹｕＺｏｎｇｓｅｎ（余宗森...     

开发我国稀土微合金钢新品种

本文简述了国内外稀土钢的现状及发展趋势,提出了将我国稀土的资源优势转化为稀土微合金钢品种优势的建议.     

Effects of RE and Vanadium on Microalloyed Steel

The effects of RE were studied by TEM, SEM, ICP and thermal simulation methods in vanadium microalloyed steel. The content.of RE in the solid solution can reach the order of 10^-5 --10^-4 in steel. The solid solution of RE was found to reduce the stability of precipitated V (C, N ), impede the precipitation of V (C, N ) in austenite, and accelerate and refine the precipitation of V (C, N) in ferrite. The combined effect of RE and V is to delay the dynamic recrystaUization, refine the grains and second phase particles, and to promote the precipitation of V (C, N) obviously. Thus the microalloying with RE and V leads to raising the strength and toughness of steel.     

把我国稀土及铌的资源优势转化为微合金稀土钢和铌钢的品种优势

1 我国稀土和铌资源情况 我国稀土和铌资源丰富,著名的包头白云鄂博铁矿是世界罕见的多金属共生矿,稀土工业储量(以REO计,下同)3600万吨,远景储量1亿吨,占世界的80％;氧化铌工业储量157.8万吨,占全国的90％,远景储量660万吨,居世界第二。稀土矿除包头外,江西、广东、湖南、广西和福建有我国独有的离子吸附型中、重稀土矿,储量近300万吨;四川冕宁县、德昌县和山     

微量稀土元素在钢中的作用机理及应用研究

本文扼要阐述了微量稀土元素在钢中的作用机理、微量稀土元素对钢的组织和性能的影响,并展望了稀土在钢中应用研究前景.