钛合金固定轴球体剖析

发布时间：2018-08-03 06:52

【摘要】：对某船用钛合金固定轴球体进行解剖分析。采用扫描电镜能谱仪、元素分析仪、显微维氏硬度计、电子万能材料试验机和数显冲击试验机分别对球体的成分(定性和定量)、硬度、力学性能和冲击韧性进行分析测试,并对球体的显微组织、拉伸和冲击断口形貌进行观察。结果表明,该固定轴球体选用的钛合金牌号为3M,横向硬度约235 HV0.2,横向抗拉强度约613MPa,横向伸长率为11%,横向断面收缩率为31%,具有较好的冲击韧性。球体的显微组织由锯齿状α和片状α相组成,拉伸断口形貌表现为韧性剪切断裂,冲击断口形貌为典型的韧窝。
[Abstract]:An anatomic analysis of a fixed shaft sphere of titanium alloy used in a ship was carried out. The composition (qualitative and quantitative), hardness, mechanical properties and impact toughness of the sphere were analyzed and tested by SEM, element analyzer, microhardness tester, electronic universal material tester and digital display impact tester, respectively. The microstructure, tensile and impact fracture morphology of the sphere were observed. The results show that the alloy grade is 3M, the transverse hardness is about 235HV0.2, the transverse tensile strength is about 613MPa, the transverse elongation is 11 and the transverse section shrinkage is 31. it has good impact toughness. The microstructure of the sphere is composed of zigzag 伪 and lamellar 伪 phase. The tensile fracture is characterized by ductile shear fracture and the impact fracture is a typical dimple.
【作者单位】：宝钛集团有限公司宝钛研究院;
【分类号】：TG115

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