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1.
机械合金化法制备Fe—Ni—P—B磁性非晶合金的研究   总被引:6,自引:0,他引:6  
李凡  季亚林 《金属学报》1999,35(11):1183-1186
用机械合金化法研究制备Fe-Ni-P-B系磁性非晶材料,用X射线衍射仪,扫描电子显微术和透射电子显微术对不同球磨工艺处理的Fe40Ni40P14B6成分的粉末进行了分析,结果表明,成分为Fe40Ni40P14B6的粉末,可通过机械合金化使其非晶化。  相似文献   

2.
不同成分Ni—Fe—P镀层的结构和性能   总被引:4,自引:0,他引:4  
通过现代测试技术研究了不同成分电沉积Ni-Fe-P合金的结构、热稳定性、磁性和耐磨性。研究结果表明,Ni-Fe-P镀层中磷量增大,镀层从晶态→晶+非晶态→,结构缺陷随之增多,表面圆顶状物尺寸变小;并且推迟了晶化稳定相的析出和再结晶,含铁量增大,镀层硬度,耐磨性和晶化温度均提高,Ni-Fe-P镀层的热稳定性和耐磨性 于Ni=P镀层。成分对Ni-Fe-P合金的磁性有明显的影响。  相似文献   

3.
本文研究了具有较低热膨胀系数的Fe-Ni和Fe-Ni-Co合金的磁性和磁性温度稳定性。研究发现,Fe-Ni系的两种合金的μm均随温度升高而增加,但是在Fe-Ni-Co合金中,由于合金成分的不同,μm随温度的变化趋势也不同。另外,本文还研究了不同含量的微量元素Cu对磁性和磁性温度稳定性的影响。  相似文献   

4.
本文比较系统地研究了Fe50Ni30P20-xBx(x=3,6,8,10,14)非晶合金中硼含量对该系列合金的静态磁导率,饱和磁感应强度,交流电输出特性,磁场退火工艺和在大电流冲击前后感应电压下降率的影响,并与合40at%Ni的Fe40Ni40P12B8非晶态合金的性能进行了比较。  相似文献   

5.
两相NiAl—Fe金属间化合物的高温氧化行为研究   总被引:3,自引:0,他引:3  
研究了NiAl、NiAl-20Fe、NiAl-30Fe金属间化合物在1000℃ ̄1100℃空气中的氧化行为。NiAl和NiAl-20Fe显示较好的抗氧化性能,NiAl-30Fe的抗氧化性能却很差。从合金相组成探讨了NiAl-Fe合金的氧化机制。  相似文献   

6.
新型Fe-Co-Ni-Zr-Nb-B非晶合金日本东北大学材料研究所研究了新型Fe-Co-Ni-Zr-Nb-B系非晶合金的热稳定性和软磁性能。合金成分为Fe56Co7Ni7Zr10-xNbxB20(x=0~10)。由电弧炉熔炼母合金,用熔体快淬法制备厚...  相似文献   

7.
电镀Ni—Fe合金的实验研究   总被引:5,自引:0,他引:5  
兰英斌  于金库 《腐蚀与防护》1999,20(8):355-356,370
介绍了适合于铸结晶器Ni-Fe合金单层溻镀技术的工艺配方,并对镀层的硬度、耐磨耗性能、耐热性能的数据进行了研究。结果表明,含3%~5%Fe的Ni-Fe合金镀层的综合性能较好,耐磨耗性能为相同厚度镍镀层的两倍。  相似文献   

8.
NiAl—Fe合金的双向形状记忆效应NiAl-Fe双相(β+γ)形状记忆合金具有良好的室温韧性。高温淬火合金经过加工热处理之后的形状回复率高达90%。影响该合金单向形状记忆效应的因素,有淬火温度、含在β相基体中的γ相数量和晶粒尺寸。但尚未见到有关该合...  相似文献   

9.
研究了适合于连铸结晶器Ni-Fe合金单层电镀技术的工艺及配方,并对镀层的硬度、耐磨耗性能、耐热性能及耐热冲击性能进行了研究。结果表明,在本工艺条件下获得的含Fe3%-5%的Ni-Fe合金镀层厚度、耐磨耗性能、耐热性能及耐热冲击性能最佳,耐磨耗性能为相同厚度镍镀层的两倍。  相似文献   

10.
新型Fe-Co-Ni-Zr-B非晶合金日本东北大学材料研究所研究了新型铁基Fe-Co-Ni-Zr-B系非晶合金的过冷液相区和软磁性能。实验的合金为五元的(Fe,Co,Ni)70Zr10B20。用电弧炉熔炼母合金,用熔体快淬法在氩气下制备了厚20μm、...  相似文献   

11.
In as-welded state, each region of 2219 aluminum alloy TIG-welded joint shows diff erent microstructure and microhardness due to the diff erent welding heat cycles and the resulting evolution of second phases. After the post-weld heat treatment, both the amount and the size of the eutectic structure or θ phases decreased. Correspondingly, both the Cu content in α-Al matrix and the microhardness increased to a similar level in each region of the joint, and the tensile strength of the entire joint was greatly improved. Post-weld heat treatment played the role of solid solution strengthening and aging strengthening. After the post-weld heat treatment, the weld performance became similar to other regions, but weld reinforcements lost their reinforcing eff ect on the weld and their existence was more of an adverse eff ect. The joint without weld reinforcements after the post-weld heat treatment had the optimal tensile properties, and the specimens randomly crack in the weld zone.  相似文献   

12.
The effect of isochronal heat treatments for 1h on variation of damping, hardness and microstructural change of the magnesium wrought alloy AZ61 was investigated. Damping and hardness behaviour could be attributed to the evolution of precipitation process. The influence of precipitation on damping behaviour was explained in the framework of the dislocation string model of Granato and Lücke.  相似文献   

13.
Institute of Process Engineering, Chinese Academy of Sciences, China, has proposed a method for oxidative leaching of chromite with potassium hydroxide. Understanding the mechanism of chromite decomposition, especially in the potassium hydroxide fusion, is important for the optimization of the operating parameters of the oxidative leaching process. A traditional thermodynamic method is proposed and the thermal decomposition and the reaction decomposition during the oxidative leaching of chromite with KOH and oxygen is discussed, which suggests that chromite is mainly destroyed by reactions with KOH and oxygen. Meanwhile, equilibrium of the main reactions of the above process was calculated at different temperatures and oxygen partial pressures. The stable zones of productions, namely, K2CrO4 and Fe2O3, increase with the decrease of temperature, which indicates that higher temperature is not beneficial to thermodynamic reactions. In addition, a comparison of the general alkali methods is carried out, and it is concluded that the KOH leaching process is thermodynamically superior to the conventional chromate production process.  相似文献   

14.
After nearly two years' tense construction, the first phase of industrialized base of Shenyang Research Institute of Foundry (SRIF), located at the Tiexi Casting and Forging Industrial Park in the west of Tiexi District, has now been completed and formally put into operation.  相似文献   

15.
韩磊 《腐蚀与防护》2015,36(1):84-90,94
综述了常见的电化学噪声数据处理方法,介绍了直流趋势剔除、统计分析、快速傅立叶变换(FFT)法计算功率谱密度(PSD)以及小波变换处理电化学噪声信号的基本过程,并阐释了各种数学处理及所得参数的物理意义。  相似文献   

16.
Coherent second phase often exhibits anisotropic morphology with specifi c orientations with respect to both the second and the matrix phases. As a key feature of microstructure, the morphology of the coherent particles is essential for understanding the second-phase strengthening eff ect in various industrial alloys. This letter reports anisotropic growth of coherent ferrite from austenite matrix in pure iron based on molecular dynamics simulation. We found that the ferrite grain tends to grow into an elongated plate-like shape, independent of its initial confi guration. The fi nal shape of the ferrite is closely related to the misfi t between the two phases, with the longest direction and the broad facet of the plate being, respectively, consistent with the best matching direction and the best matching plane calculated via the Burgers vector content(BVC) method. The strain energy calculation in the framework of Eshelby's inclusion theory verifi es that the simulated orientation of the coherent ferrite is energetically favorable. It is anticipated that the BVC method will be applicable in analysis of anisotropic growth and morphology of coherent second phase in other phase transformation systems.  相似文献   

17.
The motion of melt droplets in spray degassing process was analyzed theoretically. The height of the treatment tank in spray degassing process could be determined by the results of theoretical calculation of motion of melt droplets. To know whether the melt droplets would solidify during spraying process, the balance temperature of melt droplets was also theoretically analyzed. Then proof experiments for theoretical results about temperature of melt droplets were carried. In comparison, the experimental results were nearly similar to the calculation results.  相似文献   

18.
On the basis of the single-particle framework, a new theory on inclusion growth in metallurgical melts is developed to study the kinetics of inclusion growth on account of reaction and collision. The studies show that the early growth of inclusion depends on reaction growth and Brawnian motion collision, and where the former is decisive, the late growth depends on turbulence collision and Stokes' collision, and where the former is dominant; collision growth is very quick during the smelting process, lessened in the refining process, but nearly negligible in the continuous casting process.  相似文献   

19.
The rheology feature of Sb, Bi melt and alloys was studied using coaxial cylinder high-temperature viscometer. The results showed that the curve of torsion-rotational speed for Sb melt presents a linear relation in all measured temperature ranges, whereas for the Bi melt, the curve presents obvious non-Newtonian feature within the low temperature range and at relative high shear stress. The rheology feature of Sb80Bi20 and Sb20Bi80 alloy melts was well correlated with that of Sb and Bi, respectively. It is considered that the rheology behavior of Sb melt plays a crucial role in Sb80Bi20 alloy and that of Bi melt plays a crucial role in Sb20Bi80 alloy.  相似文献   

20.
Fatigue damage increases with the applied loading cycles in a cumulative manner and the material deteriorates with the corrosion time. A cumulative fatigue damage rule under the alternative of corrosion or cyclic loading was proposed. The specimens of aluminum alloy LY12-CZ soaked in corrosive liquid for different times were tested under the constant amplitude cyclic loading to obtain S-N curves. The test was carried out to verify the proposed cumulative fatigue damage rule under the different combinations among corrosion time, loading level, and the cycle numbers. It was shown that the predicted residual fatigue lives showed a good agreement with the experimental results and the proposed rule was simple and can be easily adopted.  相似文献   

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