Volume 0,Issue 6,1992 Table of Contents
1992(6).
Abstract:
When W and Re composited nozzle operates at high temperature, the reactive diffusion between W and Re takes place with the result that a transition layer comprising different phases appears. According to experimental results, the curves of the concentration distribution of reactive diffusion have been obtained, the components of the phases have been determined, their microstructures have been observed, and the influence of the transition layer upon operation performances has been discussed.
When W and Re composited nozzle operates at high temperature, the reactive diffusion between W and Re takes place with the result that a transition layer comprising different phases appears. According to experimental results, the curves of the concentration distribution of reactive diffusion have been obtained, the components of the phases have been determined, their microstructures have been observed, and the influence of the transition layer upon operation performances has been discussed.
1992(6).
Abstract:
Hydrogen storage properties of TiFe_xCr_yMn_z alloy activated and absorbed under 1.5 MPa hydrogen pressure have been studied,and the heason which improved the activation properties by adding Cr and Mn has been discussed.
Hydrogen storage properties of TiFe_xCr_yMn_z alloy activated and absorbed under 1.5 MPa hydrogen pressure have been studied,and the heason which improved the activation properties by adding Cr and Mn has been discussed.
1992(6).
Abstract:
Diffraction geometry of Seemann-Bohlin focusing Guinier film camera and the general principle of determing film stress and lattice constant simutaneously by this camera are described. Its design chart is also given. Taking Nb3Ge superconducting film sample for example, the paper has illustrated the determination procedure in details.
Diffraction geometry of Seemann-Bohlin focusing Guinier film camera and the general principle of determing film stress and lattice constant simutaneously by this camera are described. Its design chart is also given. Taking Nb3Ge superconducting film sample for example, the paper has illustrated the determination procedure in details.
1992(6):1-7.
Abstract:
The surface modification technologies of materials by high energy beams and their applications to the Ti alloys are reviewed in the present paper. The methods of the surface modification include laser phase transition hardening under solid state, laser surface melting-solidifying treatment, laser surface alloying, ion implantation, ion beam mixing and ion assisted physical vapor deposition. The surface hardness, wear resistent and corrosion resistant properties can be increased by mentioned above techologies.
The surface modification technologies of materials by high energy beams and their applications to the Ti alloys are reviewed in the present paper. The methods of the surface modification include laser phase transition hardening under solid state, laser surface melting-solidifying treatment, laser surface alloying, ion implantation, ion beam mixing and ion assisted physical vapor deposition. The surface hardness, wear resistent and corrosion resistant properties can be increased by mentioned above techologies.
1992(6):8-13.
Abstract:
纯三元NdFeB磁体的显微组织主要由Nd_2Fe_(14)B硬磁ψ相,富硼Nd_(1+ε)Fe_4B_4η相,富Nd相及少量杂相组成。其中占磁体体积百分比85%～90%的ψ相是非内禀磁特性的主要贡献者;占磁体体积5%的η相对iHc无益,但少许η相仍有利于ψ相形成,富Nd相对ψ相具包裹作用,有助于提高矫顽力;杂相使反磁化畴易于形成,应尽量少。同时,讨论了各显微组织的形成及作用机理。
纯三元NdFeB磁体的显微组织主要由Nd_2Fe_(14)B硬磁ψ相,富硼Nd_(1+ε)Fe_4B_4η相,富Nd相及少量杂相组成。其中占磁体体积百分比85%～90%的ψ相是非内禀磁特性的主要贡献者;占磁体体积5%的η相对iHc无益,但少许η相仍有利于ψ相形成,富Nd相对ψ相具包裹作用,有助于提高矫顽力;杂相使反磁化畴易于形成,应尽量少。同时,讨论了各显微组织的形成及作用机理。
1992(6):20-24.
Abstract:
The formation conditions morphology and machanical properties of the CuCo_2Be alloy of widmanstatten structure were studied in this paper. The results show that the widrmanstatten structure in the form of needle CoBe phase in CuCO_2Be alloy under a given condition and has a strict orientation with the matrix. The widmanstatten structure, the needle CoBe phase in CuCo_2Be alloy would be spheroidized and coarsenned, annealing for long time at high temperature after resulting in the change of mechanical properties.
The formation conditions morphology and machanical properties of the CuCo_2Be alloy of widmanstatten structure were studied in this paper. The results show that the widrmanstatten structure in the form of needle CoBe phase in CuCO_2Be alloy under a given condition and has a strict orientation with the matrix. The widmanstatten structure, the needle CoBe phase in CuCo_2Be alloy would be spheroidized and coarsenned, annealing for long time at high temperature after resulting in the change of mechanical properties.
1992(6):25-28.
Abstract:
研究了新中强耐蚀钛合金Ti-3AR(Ti-Al-Mo-Ni)在室温,60C,沸腾条件下的20%—50%HNO_3、1.5%—30%H_2SO_4、1.5%—15%HCl中的耐蚀性,并从电化学角度对其耐蚀机理进行了分析。结论认为:Ti-3AR具有与Ti-12相当的良好耐蚀性能,这是由于新添加的合金元素Mo,Ni能程度不同地提高钛在H_2SO_4,HCl等介质中的腐蚀电位,并通过促进阳极钝化改善钛的腐蚀性能。
研究了新中强耐蚀钛合金Ti-3AR(Ti-Al-Mo-Ni)在室温,60C,沸腾条件下的20%—50%HNO_3、1.5%—30%H_2SO_4、1.5%—15%HCl中的耐蚀性,并从电化学角度对其耐蚀机理进行了分析。结论认为:Ti-3AR具有与Ti-12相当的良好耐蚀性能,这是由于新添加的合金元素Mo,Ni能程度不同地提高钛在H_2SO_4,HCl等介质中的腐蚀电位,并通过促进阳极钝化改善钛的腐蚀性能。
1992(6):29-34.
Abstract:
对Ti_3Al基合金Ti_3Al-26M,Ti_3Al-11.5M和Ti_3Al-22M(wt%)(M=Nb,Mo,V)的热处理与显微组织和显微组织与蠕变性能之间的关系进行了探讨。结果表明:同一合金在不同热处理条件下的显微组织具有不同的特征和尺寸,而在同一热处理条件下的3种合金显微组织特征相同,只是晶粒的尺寸不同。高温蠕变性能测定表明,Ti_3Al-26M合金的蠕变性能优于Ti_3Al-11.5M和Ti_3Al-22M合金。Ti_3Al-26M合金经β固溶处理的魏氏组织的蠕变性能最好,经α_2+β固溶+时
对Ti_3Al基合金Ti_3Al-26M,Ti_3Al-11.5M和Ti_3Al-22M(wt%)(M=Nb,Mo,V)的热处理与显微组织和显微组织与蠕变性能之间的关系进行了探讨。结果表明:同一合金在不同热处理条件下的显微组织具有不同的特征和尺寸,而在同一热处理条件下的3种合金显微组织特征相同,只是晶粒的尺寸不同。高温蠕变性能测定表明,Ti_3Al-26M合金的蠕变性能优于Ti_3Al-11.5M和Ti_3Al-22M合金。Ti_3Al-26M合金经β固溶处理的魏氏组织的蠕变性能最好,经α_2+β固溶+时
1992(6):35-39.
Abstract:
研究了钯中含有0.62wt%—6.96wt%钇的5种成分PdY合金箔的制备工艺、加工性能及氕渗透性,并就钌的加入对PdY合金性能的影响进行了探索。测定了两种合金系箔材的X线衍射谱。结果表明,随着Y含量的增加,PdY合金的硬度、强度及塑性值均提高,氕的渗透率也明显增加。钌加入合金后,进一步使PdY合金的力学和加工性能得到提高。
研究了钯中含有0.62wt%—6.96wt%钇的5种成分PdY合金箔的制备工艺、加工性能及氕渗透性,并就钌的加入对PdY合金性能的影响进行了探索。测定了两种合金系箔材的X线衍射谱。结果表明,随着Y含量的增加,PdY合金的硬度、强度及塑性值均提高,氕的渗透率也明显增加。钌加入合金后,进一步使PdY合金的力学和加工性能得到提高。
1992(6):40-44.
Abstract:
研究了用快速冷凝(RS)旋转电极工艺制取的Ti_3Al基合金粉末的物理性能、化学性能、显微结构以及热处理对显微结构、显微硬度的影响。结果表明,用该方法制备的合金粉末,化学成分稳定,工艺性能良好,细颗粒粉末由单相β固溶体组成,但随着热处理温度的变化,粉末的显微结构和显微硬度发生相应的变化。
研究了用快速冷凝(RS)旋转电极工艺制取的Ti_3Al基合金粉末的物理性能、化学性能、显微结构以及热处理对显微结构、显微硬度的影响。结果表明,用该方法制备的合金粉末,化学成分稳定,工艺性能良好,细颗粒粉末由单相β固溶体组成,但随着热处理温度的变化,粉末的显微结构和显微硬度发生相应的变化。
1992(6):45-50.
Abstract:
The physical, mechanical, corrosion properties and microstructures have been studied for the three kinds of 2024 aluminium alloys containing mixed trace earth elements of 0.005,0.016,0.053 wt% respectively. It has been shown that the starting point of metling temperature range was obviously elevated, tensile-compression fatigue lifes were increased and the stress corrosion resistance has been slightly improvement.
The physical, mechanical, corrosion properties and microstructures have been studied for the three kinds of 2024 aluminium alloys containing mixed trace earth elements of 0.005,0.016,0.053 wt% respectively. It has been shown that the starting point of metling temperature range was obviously elevated, tensile-compression fatigue lifes were increased and the stress corrosion resistance has been slightly improvement.
1992(6):51-56.
Abstract:
对不同状态的锆-4合金管材进行了高温蒸汽腐蚀研究。经400℃预膜和未预膜的样品在460℃/10.3 MPa的蒸汽中进行腐蚀试验,结果表明:未预膜的样品迅速腐蚀,而预膜处理延缓了疖状腐蚀的产生;不同加工工艺的样品的腐蚀结果截然不同。挤压前进行β淬火使Zr-4合金的抗疖状腐蚀性能得到改善,应变时效处理后的Zr-4合金管材具有良好的抗疖状腐蚀性能。疖状腐蚀的敏感性与合金的组织状态密切相关,取决于合金中的第二相粒子的数密度、平均粒子大小和基体中溶质元素的含量。
对不同状态的锆-4合金管材进行了高温蒸汽腐蚀研究。经400℃预膜和未预膜的样品在460℃/10.3 MPa的蒸汽中进行腐蚀试验,结果表明:未预膜的样品迅速腐蚀,而预膜处理延缓了疖状腐蚀的产生;不同加工工艺的样品的腐蚀结果截然不同。挤压前进行β淬火使Zr-4合金的抗疖状腐蚀性能得到改善,应变时效处理后的Zr-4合金管材具有良好的抗疖状腐蚀性能。疖状腐蚀的敏感性与合金的组织状态密切相关,取决于合金中的第二相粒子的数密度、平均粒子大小和基体中溶质元素的含量。
1992(6):61-64.
Abstract:
Ion-implantation has been carried out for the metal Be in different doses,and the surface microhardness has been measured after the ion implantation.The hardness of the surface layers ion-implanted has been calculated by the Jonsson hardness model from the measured hardness and analysed as a function of implanted doses for the harden mechanism of implantation.The results showed that the hardness of Be increased by a factor of 9 after ion-implantation.
Ion-implantation has been carried out for the metal Be in different doses,and the surface microhardness has been measured after the ion implantation.The hardness of the surface layers ion-implanted has been calculated by the Jonsson hardness model from the measured hardness and analysed as a function of implanted doses for the harden mechanism of implantation.The results showed that the hardness of Be increased by a factor of 9 after ion-implantation.
1992(6):65-68.
Abstract:
Determination of trace aluminium has been investigated in this paper.First,the Zr,Ti,Fe and Hf were and separated from aluminium in a sulfuric acid medium.Then,the complex of aluminium-N-bonzoyl-N-phenylhydroxylamine was extracted in the resultant aqueous phase by benzene at pH 8.5,and aluminium was extracted in the resulting organic phase by dilute hydrochloric acid.Lastly,aluminium content was determined by the chromazurol S photometric method in the pHrange of 5.5 to 6.the method can be used for the determination of traee aluminium in the range of 0.0025%to 0.035% in Zirconium and zirconium alloys with satisfactory results.
Determination of trace aluminium has been investigated in this paper.First,the Zr,Ti,Fe and Hf were and separated from aluminium in a sulfuric acid medium.Then,the complex of aluminium-N-bonzoyl-N-phenylhydroxylamine was extracted in the resultant aqueous phase by benzene at pH 8.5,and aluminium was extracted in the resulting organic phase by dilute hydrochloric acid.Lastly,aluminium content was determined by the chromazurol S photometric method in the pHrange of 5.5 to 6.the method can be used for the determination of traee aluminium in the range of 0.0025%to 0.035% in Zirconium and zirconium alloys with satisfactory results.
