共查询到17条相似文献，搜索用时 546 毫秒
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试验研究了热处理对CuCr/1Cr18Ni9Ti双金属复合材料结合区组织和性能的影响。结果表明,热处理后,结合区没有明显的裂纹和脆化现象,界面反应层宽度无明显增加;热处理工艺明显提高了1Cr18Ni9Ti奥氏体不锈钢的硬度,界面反应层和CuCr合金的显微硬度略有增加。 相似文献
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许芙蓉 《试题与研究：高中理科综合》2019,(1):0053-0053
本文采用FANUC焊接机器人对1Cr18Ni9Ti不锈钢薄板进行焊接,在5种不同的焊接电流下,研究了焊缝成形、 焊缝及热影响区的金相组织。试验结果表明,焊接电流分别为 80A,90A,100A三组试验参数下所得到的焊接接头’其焊缝成 形良好,组织均为单相奥氏体。焊接电流为80A的这一组参数 所得到的焊接接头’其焊缝及热影响区晶粒最细,性能最好,为 最佳参数。 相似文献
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文言 《十堰职业技术学院学报》1998,(1)
根据马氏体转变的层错形核机制,推导ε马氏体形核数与合金层错能及新相界面能的关系,进而确定铬与氢对Cr—Ni—Mn—N系奥氏体不锈钢ε马氏体转变的内在影响.铬具有提高Cr—Ni—Mn—N系奥氏体不锈钢层错能,抑制ε马氏体形核的作用.氢则有降低新相界面能、促进ε马氏体形核的作用. 相似文献
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利用高温固相反应法制备了新型锂电池负极材料Cr Ti Ta O6.通过X射线衍射技术和电化学性能测试对Cr Ti Ta O6的微观结构及其电化学性能进行了表征.研究结果表明,该新材料为四方金红石结构,空间群为P42/mnm;电化学性能测试表明,该材料具有良好的比容量和循环性能,在电压范围0~3.0 V内,以16 m A/g的电流密度,其初始放电比容量达300 m Ah/g,20次循环后容量始终保持在52 m Ah/g. 相似文献
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钎焊间隙对镍基钎料接头强度的影响 总被引：4，自引：0，他引：4
刘海侠 《河北软件职业技术学院学报》2007,9(1):69-72
本文系统研究了Ni82.5Cr7Si4.583Fe3成分的非晶态及晶态钎料在不同的钎焊规范下,真空钎焊1Cr18Ni9Ti不锈钢时,接头强度随钎焊间隙变化的特征及与钎缝组织的对应关系.结果表明,接头强度随钎焊间隙的变化存在平台值现象,平台对应的两个特征钎焊间隙分别称为最小可用钎焊间隙{Wmin)和最大可用钎焊间隙(Wmax);从保证填缝质量及成形来看.Wmin不应小于0.01mm;从避免钎缝中出现脆性化合物相及获得较高接头强度考虑.钎焊间隙选择不应大于Wmax;在两个特征钎焊间隙内.钎焊间隙变化对接头强度影响不大;钎焊温度或钎焊保温时间增加时.最大可用钎焊间隙也增大,而最小可用钎焊间隙基本保持不变. 相似文献
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Na吸收光谱实验成功与否主要取决于热管炉的性能，而制作热管炉的材料对其性能至关重要。本文对不锈钢热管炉的选材问题进行了系统的实验研究。发现必须选取OCr18Ni9等型号不锈钢制成的热管炉才能成功地用于实验中。 相似文献
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马云锐 《通化师范学院学报》2009,30(12):23-24
该文研究了采用机械合金化法制备Ni—Ti—Nb非晶态合金材料,用X射线衍射仪（XRD）、扫描电子显微镜（SEM）对经不同机械合金化时间得到的Ni—Ti—Nb混合粉末进行了分析,结果表明Ni—Ti—Nb混合粉末球磨10h后可实现机械合金化。随着球磨持续进行,Ni、Ti、Nb合金粉末之间相互扩散,当扩散速度增加到一定程度,来不及形成有序结构,而形成Ni—Ti—Nb系非晶合金． 相似文献
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以PVDF为碳源,采用溶胶凝胶法制备Li1.2Mn0.54Ni0.13Co0.13O2/C正极复合材料.利用X-射线衍射(XRD)、同步热分析、扫描电子显微镜(SEM)表征合成材料的结构,利用充放电测试、循环伏安及交流阻抗测试系统地研究了碳包覆对材料电化学性能的影响.研究表明,合成的材料具有a-Na Fe O2层状结构且碳均匀包覆在Li1.2Mn0.54Ni0.13Co0.13O2颗粒表面.相比于Li1.2Mn0.54Ni0.13Co0.13O2,Li1.2Mn0.54Ni0.13Co0.13O2/C表现出更好的倍率性能和循环稳定性.电化学性能测试表明,碳表面修饰层增强了活性材料颗粒之间的电导性能,有效缓解电解液中HF对活性材料的腐蚀,降低电荷跃迁电阻(Rct),从而有效提高了材料的电化学性能. 相似文献
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徐坚 《宁波大学学报(教育科学版)》1988,(1)
本文作者利用自行研制的激光测氢装置,测量了焊接接头和U型试样中的氢分布,并且推导了U型试样弯曲部分(塑性变形区)的应变、残余应力计算公式。结果表明:在焊接接头中,1.沿熔深方向上,氢分布是不均匀的。最高氢含量在熔合线附近;2.氢的具体分布情况,取决于焊缝金属和母材原始含氢量,以及金相组织。在U型试样中,1.计算应变的公式ε_θ~ρ=(tθ)/(πr_0)和应力公式σ_θ=F((tθ)/(πr_0))~n可以用来计算无明显反弹的U型试样弯曲部分的应变量和残余应力值。1Cr18Ni9Ti(C.R.)钢的F=990MPa、n=0.146;2.氢分布明显受应力和应变的影响。应力、应变值愈大,含氢量愈高。 相似文献
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1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｔｈｅａｌｌｏｙｉｎｇｏｆｈｉｇｈｍｏｌｙｂｄｅｎｕｍａｎｄｈｉｇｈｎｉｔｒｏｇｅｎｉｓｔｈｅｆｕｎｄａｍｅｎｔａｌｏｆｄｅｖｅｌｏｐｉｎｇｍｏｄｅｒｎｈｉｇｈｌｙ ａｌｌｏｙｅｄａｕｓｔｅｎｉｔｉｃｓｔａｉｎｌｅｓｓｓｔｅｅｌｓ,ｉｔｓｏｐｔｉｍｕｍｒｅｓｉｓｔａｎｃｅｔｏｐｉｔ ｔｉｎｇａｎｄｓｔｒｅｓｓｃｏｒｒｏｓｉｏｎｉｓｃｏｍｍｏｎｌｙａｃｋｎｏｗｌ ｅｄｇｅｄ[1 ,2 ].Ｉｎｔｈｉｓｓｙｓｔｅｍ ,0 0Ｃｒ2 0Ｎｉ18Ｍｏ6Ｃｕ[Ｎ]ａｎｄ0 0Ｃｒ2 0Ｎｉ18Ｍｏ5Ｃｕ [Ｎ ]… 相似文献
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The characteristics of microstructure, mechanical property and corrosion behavior of Cr26Mo3.5 super stainless steel joints by pulse tungsten inert gas(P-TIG)welding and laser welding were investigated. The results indicate that the widths of the center equiaxed grain zone(EGZ)and the columnar grain zone(CGZ)increase with the increase of heat input in both welding processes. The precipitates of Nb and Ti carbides and nitrides are formed in the weld metal(WM)and the heat affected zone(HAZ). The joints by laser welding show better tensile and corrosion resistance properties than those by P-TIG welding due to the heat concentration and lower heat input. The tensile strength and elongation increase with the decrease of heat input, and the fracture mode of the joints turns into ductile-brittle mixed fracture from ductile fracture when the welding method turns into P-TIG welding from laser welding. Moreover, the corrosion resistance of all joints declines slightly with the increase of heat input. Hence, laser welding is more suitable for welding Cr26Mo3.5 super stainless steel in engineering applications. 相似文献
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Amorphous alloy Mg1.8Cu0.2Ni was successfully prepared by mechanical alloying (MA) and a series of (n?x)Nix(Ti?B) composites were synthesized by MA. The electrochemical properties of Mg1.8Cu0.2Ni coated by Ni, Ti and B were studied by cyclic charge-discharge, linear polarization curve, and hydrogen diffusion coefficient experiments. Experimental results indicate that Mg1.8Cu0.2Ni-[0.9Ni0.6(Ti?B)] composite which was MA 30 h exhibited the best performance and its initial discharge capacity arrived to 714.1 mAh/g. After 30 cycles the discharge capacity was above 530 mAh/g, which was much higher than that of Mg1.8Cu0.2Ni. And after 100 cycles it holded still 442.1 mAh/g. On all accounts, after modification by Ni, Ti and B, the initial discharge capacity and high-rate discharge ability of the electrode were evidently increased. At the same time, the cycle performance was also improved significantly. 相似文献
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The market of stainless electric steel kettles is growing significantly, but the main mechanism for polishing kettles via traditional handwork operations limits the growth of electric kettle manufacturing. Based on the successful multi-tool automatic polishing system for electric stainless steel kettles, regression analysis and orthogonal tests were employed to construct a polishing process model, with a purpose to improve the automatic polishing technology for electric stainless steel kettles. The model reveals the relationship between the surface roughness and processing parameters including gringding depth, abrasive tangent speed, workpiece rotating speed and axial feeding speed. Simulation and experimental results are in agreement,which shows that this modeling method is feasible in practice, and it can also be used as a guidance for planning automatic polishing process of electric stainless-steel kettles. 相似文献
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本文通过测量Co3Ti、 Ni3Al、 Fe3Al、 TiAl四种金属间化合物在氧气、氢气中在2×10-4/s形变速率下的拉伸性能，研究了
其在氢气中的室温环境脆性.研究结果表明，上述四利金属间化合物在H2中的脆化程度(用氢脆因子
IH2=[(δo2一δH2)/δo2]×100％表示)是不同的，其大小依次为Co3Ti＞Ni3 Al＞Fe3Al＞TiAl.其脆化程度的差异用金属间化合物中
基体金属对氢气的催化裂解作用的强弱进行了很好的解释. 相似文献