压裂分隔工具用可溶镁合金Mg-7Al-1Zn-1Ni-1Cu的制备与性能  

Preparation and Properties of Soluble Mg Alloy Mg-7Al-1Zn-1Ni-1Cu Used in Fracturing Separation Tools

作　　者：杨军 尹俊禄[1] 张文[1] 刘小会[1] 韩振华[2] YANG Jun;YIN Junlu;ZHANG Wen;LIU Xiaohui;HAN Zhenhua(Changqing Downhole Technology Company, Chuanqing Drilling Engineering Co. , Ltd. , Xi＇an 710021, China;School of Materials Science and Engineering, Xi＇ an University of Technology, Xi＇ an 710048, China)

机构地区：[1]川庆钻探工程有限公司长庆井下技术作业公司,西安710021 [2]西安理工大学材料科学与工程学院,西安710048

出　　处：《有色金属工程》2018年第3期47-50,56,共5页Nonferrous Metals Engineering

基　　金：陕西省科技统筹创新工程计划项目(2016KTZDGY09-06-02)

摘　　要：采用熔炼、热挤压工艺制备用于加工压裂分隔工具的可溶镁合金Mg-7Al-1Zn-1Ni-1Cu,并对其显微组织结构、力学性能、腐蚀性能及工件的现场使用性能进行了研究。结果表明,铸态合金在室温和120℃下的抗拉强度分别为160、150 MPa,经后续热挤压处理,合金在室温和120℃下的抗拉强度分别上升至300、252 MPa,室温下布氏硬度值从64上升至78,且延伸率也有所上升。挤压态合金在模拟地层水中的腐蚀速率随温度升高而加快,用其加工的压裂球工件在90℃、70 MPa下承压密封性良好,并成功应用于现场施工。The soluble Mg-7Al-1Zn-1Ni-1Cu alloy used for fabricating down-hole tools was prepared by cast and hot-extruded method. The microstructure, mechanical properties, corrosion behavior and application performance of the alloy were investigated. Tensile strength of the cast alloy at room temperature and 120 ℃ was 160 MPa and 150 MPa, respectively. After hot-extruded treatment, the tensile strength of the soluble alloy at room temperature and 120℃ increased to 300 MPa and 252 MPa, respectively, and the brinell hardness value also increased from 64 to 78. The soluble rate of hot-extruded alloy increased with temperature increasing in simulated formation water. The frac-ball fabricated by using hot-extruded alloy showed a good compressive resistance under 70 MPa at 90℃ , which could be used in fracturing process.

关 键 词：Mg-Al-Zn-Ni-Cu合金 力学性能 腐蚀性能 分段压裂 分隔工具 

分 类 号：TG379[金属学及工艺—金属压力加工]