油井管用15％Cr马氏体不锈钢的开发

研究13％Cr马氏体不锈钢在含CO_2油井环境下的耐腐蚀性能的同时,开发了15％Cr马氏体不锈钢,并用该钢制造出L-80级无缝钢管。经试验,15％Cr钢具有良好的韧性,可在200℃以下含微量H_2S的CO_2环境中使用,其耐硫化氢应力腐蚀(SSC)性能与13％Cr钢相同,并比22％Cr双相不锈钢更为经济。

15%Cr MARTENSITIC STAINLESS STEEL DEVELOPED FOR OCTG

While studying the anti-corrosion property of 13％Cr martensitic stainless steel under oil well having CO_2, a new 15％Cr martensitic stainless steel was developed and the L-80 grade seamless tubes of the steel were manufactured. The experiment shows that the 15％Cr steel with high toughness and with the same SSC resistance property as that of 13％Cr steel, can be employed in CO_2 environment containing small amount of H_2S under the temperature up to 200℃ and that it is more economic to use the steel than to use 22％Cr duplex stainless steel.