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张喜亮刘涛张红娜岳万超王佳佳杨吉 《材料热处理学报》2017,(3):89-96
借助电子背散射衍射(EBSD)技术、透射电镜(TEM)及俄歇(Auger)电子能谱分析新型添加V的ULC-BH钢再结晶退火过程中微观织构演变、析出行为及P晶界偏聚。结果表明:P提高ULC-BH钢{111}<112>织构强度,削弱{111}<110>织构强度,总体表现为P对γ纤维织构有利。P的添加推迟ULC-BH钢再结晶时间,在相同退火条件下,含磷ULC-BH钢晶粒尺寸要小于普通的ULC-BH钢。对于Ti含量较低的含V的ULC-BH钢,退火过程中析出物稀少且对再结晶织构的演变影响较小,P的晶界偏聚是影响再结晶织构的重要因素。 相似文献
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采用氮气炉加热模拟薄板坯连铸连轧生产线罩式退火工艺,研究了不含B与含适量B的含磷高强IF钢210P1冷轧板再结晶规律;采用X射线衍射仪对不同B含量的罩式退火成品板进行了织构分析;对成品板的显微组织进行了观察并对现场生产的不同B含量钢板的r90值进行了统计。结果表明:将B含量控制在0.0005%~0.0007%时,冷轧钢板罩式退火再结晶温度与不含B的冷轧钢板基本相同,甚至再结晶更充分些,而且加适量的B可解决含磷IF钢二次加工脆性问题,成品板具有较高强度的有利织构{111}110和{111}112、较高的{111}/{100}比值以及较高的成形性能指标r90值,成品板的饼形晶粒更大。当B含量超过0.0009%时,再结晶晶粒较小且不均匀,有利织构较弱,塑性应变比r_(90)值较低。 相似文献
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针对不同的连续退火温度,研究了其对高强IF钢的组织、织构及力学性能的影响。结果表明:当连续退火温度为760℃时,退火板再结晶不完全,屈服强度较高,伸长率较低,应变硬化指数n值和塑性应变比r值较低,{111}织构较弱;随着退火温度的升高,拉长晶粒完全消失,退火板晶粒尺寸增大且均匀性增强,屈服强度降低,伸长率、n值和r值上升。退火温度在790℃以上时,退火板织构以γ织构为主;随着退火温度继续升高,退火板γ织构中{111}110和{111}112取向强度差减小,各向同性增强。升高连续退火温度有利于提高高强IF钢的组织均匀性、成形性能以及深冲性能。 相似文献
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Ti-IF钢罩式退火过程中再结晶织构演变规律研究 总被引:1,自引:1,他引:0
采用X射线衍射技术(XRD)和电子背散射衍射技术(EBSD),并结合微观组织观察分析了Ti-IF钢罩式退火过程中织构演变规律和{111}再结晶织构形成机制.结果表明:随退火温度的升高,再结晶量逐渐增多,{111}再结晶织构强度亦逐渐增强,同时{100}织构强度逐渐减弱.{111}取向的品粒主要在再结晶过程中形成,依靠吞并其他取向[主要是{100}取向]的晶粒而长大;并且在{111}取向品粒长大过程中,γ纤维织构之间也发生相互转化,主要由{111}<112>织构转变为{111}<110>织构;冷轧IF钢再结晶退火后具有较强的γ纤维织构,主要是"取向形核"和"取向长大"共同作用的结果,其中Σ重位晶界在再结晶γ纤维织构形成过程中起着重要作用. 相似文献
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研究了冷轧高强IF钢在810 ℃退火保温不同时间下的组织及织构,以及加入稀土对高强IF钢组织及织构的影响。结果表明,
高强IF钢810 ℃退火时,保温时间低于15 s时再结晶已经开始;加稀土的试样,保温45 s与60 s时,{111}<112>织构均比{111}<110>织构强,但60 s时的{111}面织构均匀性较好。由于稀土的加入,退火后高强IF钢的铁素体晶粒得到细化,硬度升高,且造成较强的α纤维织构与较弱的γ纤维织构,减缓了变形织构强度降低的速率,延迟了再结晶过程;同时{111}面织构的均匀性变差。 相似文献
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通过对轧制态的含磷Nb-Ti高强IF钢冷轧硬卷进行750~870℃退火试验,在Instron5569拉伸试验机上测试计算了塑性应变比r值和平面各向异性指数Δr,并对不同退火温度下的试样进行了ODF分析。结果表明,退火温度从750℃升高到870℃,试验钢的r0、r45、r90和珋r均随温度的升高而增大;平面各向异性随退火温度的升高而降低。结合显微组织分析,810~840℃退火时,试验钢获得最佳综合性能。试验钢从冷轧态到完全再结晶,{001}<110>、{110}<110>织构强度降低,{112}<110>织构遗传成为最强织构,而{111}<110>织构比{111}<112>织构强,使Δr值为负值;最佳退火温度(810~840℃)条件下最大珋r值为1.65,Δr为-0.38。 相似文献
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模具渗硼工艺及其发展应用 总被引:4,自引:0,他引:4
渗硼是提高模具使用寿命的重要途径,是在金属表面形成高硬度的金属硼化层,显著提高其耐磨性,且具有良好的耐热性和耐蚀性。近年来,随着渗硼工艺逐步改进和完善,已发展了复合渗、多元共渗及低温渗硼工艺,取得了良好的经济效果。 相似文献
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A. A. Babakov 《Metal Science and Heat Treatment》1967,9(10):764-770
Conclusions Highly alloyed steels and alloys are produced in conformity with GOST or technical specifications in thick and thin sheets, beams and channels, bars, hot-rolled and cold-rolled pipe, and rod. Castings are produced in the specialized plant of the Ministry of Chemical and Petroleum Machine Building.The technology of welding stainless steels and alloys is given in [15] and [16].TsNIIChERMET. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 43–50, October, 1967. 相似文献
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A. Yu. Tsivadze G. V. Ionova V. K. Mikhalko 《Protection of Metals and Physical Chemistry of Surfaces》2010,46(2):149-169
The possibility of using unique properties of lanthanides in the nanotechnology is demonstrated. The origination of linear
and nonlinear optical properties of lanthanide compounds with phthalocyanines, porphyrins, naphthalocyanines, and their analogs
in solutions and condensed state and the prospects of obtaining novel materials on their basis are discussed. Based on the
electronic structure and properties of lanthanides and their compounds, namely, optical and magnetic characteristics, electronic
and ionic conductivity, and fluctuating valence, molecular engines are classified. High-speed storage engines or memory storage
engines; photoconversion molecular engines based on Ln(II) and Ln(III); electrochemical molecular engines involving silicate
and phosphate glasses; molecular engines whose operation is based on insulatorsemiconductor, semiconductor-metal, and metal-superconductor
types of conductivity phase transitions; solid electrolyte molecular engines; and miniaturized molecular engines for medical
analysis are distinguished. It is shown that thermodynamically stable nanoparticles of Ln
x
M
y
composition can be formed by d elements of the second halves of the series, i.e., those arranged after M = Mn, Tc, and Re.
Prospects of using lanthanide superconductors in nanotechnology are considered. 相似文献
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金刚石、CBN有序排列及择优取向工具的研发及应用 总被引:1,自引:0,他引:1
有序排列/择优取向超硬材料工具的技术创新,将广泛适用于电镀、树脂、陶瓷、金属结合剂制品工具中,使用超硬材料颗粒在结合剂中均匀排列并择优定向,以最大潜能的发挥超硬材料各个方面固有的特性。并针对不同的加工对象,有选择性的使用超硬材料各自不同的特性,从而使超硬材料工具将以经济、高质与高效的优势替代传统的超硬材料工具并将进入新兴的加工领域,为生产企业带来新的发展机遇。本文将对有序排列与择优取向技术的研究现状及其在不同的金刚石工具中的应用做一阐述。 相似文献
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V. Kulikovsky V. Vorlí?ek M. Stranyánek R. ?tvrtlík A. Kurdyumov 《Surface & coatings technology》2008,202(9):1738-1745
Hydrogen-free amorphous and nanocrystalline films were prepared by magnetron sputtering of the SiC or Si targets. Mechanical properties (hardness, elastic modulus, intrinsic stress) and film structures were investigated in dependence on the substrate bias and temperature. It was found that both hardness and elastic modulus of all amorphous a-SiC films prepared at different substrate temperatures and biases are always lower than those for bulk α-SiC single crystal while the hardness of partially crystalline SiC films is higher and the elastic modulus lower than those for α-SiC one. In contrast, both hardness and elastic modulus of all amorphous Si films are always lower than those for nanocrystalline Si films which show approximately the same value as the Si single crystal. 相似文献