Interfacial microstructure and properties of clad steel pipes by centrifugal casting and extruding
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摘要: 采用離心澆鑄擠壓工藝制備了20Cr/1Cr18Ni9Ti復合鋼管.通過掃描電鏡研究了試制復合鋼管界面區域的顯微組織,利用拉伸實驗和熱疲勞實驗測試了其力學性能.結果表明,采用離心澆鑄擠壓工藝生產的復合鋼管實現了界面完全冶金結合,界面結合強度大大提高,界面處存在的過渡區增強了復合管的加工、使用性能.采用此新工藝生產的復合鋼管具有較好的組織和性能,并且工序簡短,生產成本低.Abstract: Clad steel pipes of 20Cr/1Cr18Ni9Ti were prepared by centrifugal casting and extruding. The interracial microstructure of the preproduction clad steel pipes was analyzed by SEM and the mechanical properties were tested by tensile test and thermal cycling test. The results show that the clad steel pipes get completely metallurgical bonding interface with greatly increased bonding strength and their processability and service performance are improved due to transversal area in the interface. It is indicated that not only the centrifugal casting and extruding process can be used to produce the clad steel pipes with better microstructure and properties, but also its working procedure is simple and its production cost is low.
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