中文摘要：

以高能球磨粉末为原料，研究了铬元素对93W-4.9Ni-2.1Fe合金性能和微观结构的影响。实验采用光学金相（OM）、扫描电镜（SEM）、EDAX能谱等方法对试样的组织形貌进行了表征；对合金的拉伸强度、延伸率和合金的相对密度进行了测试。结果表明：不添加Cr的93W-4.9Ni-2．1Fe合金其相对密度为99.3％，延伸率为15％，抗拉伸强度为997．2MPa；在Cr的添加量（质量分数）为0～1．5％，随Cr含量由0增加到1．5％，93W-Ni-Fe合金抗拉伸强度、相对密度、延伸率分别由997．2MPa、99．3％、15％降至834．7MPa、95．2％、5．7％；添加Cr元素后，Cr、W、Ni、Fe、O等元素在93W-Ni-Fe合金中生成富Cr固溶体，并在合金界面上形成偏聚，降低了93W-Ni-Fe合金界面的结合强度，导致合金的力学性能有所降低。

英文摘要：

The effects of element chromium additions on properties and microstructure of 93W-4.9Ni-2.1Fe alloys were investigated in this paper. Optics microscope（OM）, scanning electricity microscope （SEM） and EDAX energy spectrum were used to analyze the microstructures and compositions of the alloys, respectively. The tensile strength and elongation of alloys were tested with quasi-static tensile testing machine, and the relative densities of the alloys were measured with Archimedes method. The experimental results indicated, when the element Cr was in the range of 0 to 1.Swt%, with the increase of Cr content, the tensile strength, relative density and elongation of 93W-Ni-Fe alloy were reduced from 997.2 MPa, 99.3%, 15% to 834.7 MPa, 95.2%, 5.7%, respectively. Upon adding Cr element, Cr-rich solid solution appeared in 93W-Ni-Fe alloy, and gathered along interface of the alloys, which resulted in reducing of the mechanical properties of 93W-Ni-Fe alloys.