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35钢45钢化学成分与机械性能的关系 总被引:1,自引:0,他引:1
通过两种钢数据的统计分析,结果表明,控制化学成分范围可使机械性能得到较大的提高,从而对现有的钢号标准有进一步探讨的必要。 相似文献
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根据普通碳素钢的反弯矫直计算方法,对高速钢棒材的反弯矫直压下量进行了修正,并通过矫直实验进行了验证。 相似文献
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K. N. Vdovin N. A. Feoktistov E. V. Sinitskii D. A. Gorlenko N. A. Durov 《Steel in Translation》2016,46(1):16-20
Metallographic data are presented for manganese steel before and after ladle treatment—specifically, treatment with calcium–strontium carbonate or argon injection in the ladle or both. Quantitative analysis of the nonmetallic inclusions is undertaken. The position of the inclusions relative to the grain boundaries is determined. Electron microscopy permits detailed study of the composition and form of the inclusions that appear during ladle treatment and without such treatment. The influence of various types of ladle treatment on the impact strength of manganese steel is discussed. Alloying of the manganese steel with vanadium is considered. Practical data regarding the influence of alloying with vanadium on the impact strength of the manganese steel are presented. 相似文献
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概述了美国对旧有大型钢铁联合企业的改造,提出了大力发展短流程钢厂的创新思路,显现了大力发展电炉新工艺的优越性. 相似文献
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随着我国钢铁行业产能的不断扩张,对供应链的建立和完善已日趋为钢铁业所重视,并纷纷着手建立了产品的供应链运作模式.今后的钢材市场竞争将是供应链与供应链之间的竞争.因此,对于包钢来说也应重点研究供应链的建立和完善. 相似文献
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V. G. Khanzhin S. A. Nikulin V. A. Belov V. Yu. Turilina A. B. Rozhnov 《Russian Metallurgy (Metally)》2013,2013(4):313-320
The hydrogen embrittlement resistances of 35KhGM steel in states of different strengths are compared. The effect of strength on the fracture mechanism and kinetics in the steel during hydrogen embrittlement is demonstrated using a joint analysis of acoustic emission signals and stress-strain diagram during tension, metallography, and fractography. 相似文献
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太钢第二炼钢厂以转炉、连铸机高效化生产为主线进行了一系列的技术改遣和项目建设,主要技术经济指标大幅度提高。具备了年产240万t碳钢的生产能力,成为一个具有竞争力的现代化炼钢厂。 相似文献
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本文叙述企业在"八五”至"九五”期间依靠技术进步,为适应市场经济和广州市城市建设发展需要,进-步实施技术改造和搬迁,使企业在原有基础上获得了新的发展. 相似文献
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??The hot compression tests of 2. 25Cr1Mo steel at 950-1200??, 0. 01-10s-1, and deformation of 60% were carried out on a Gleeble- 1500D simulator. The effects of deformation temperature and strain rate on the dynamic recrystallization of 2. 25Cr1Mo steel were investigated. The models for dynamic recrystallization critical strains and dynamic recrystallization fraction were established. The results show that 2. 25Cr1Mo steel is more likely to undergo dynamic recrystallization at high temperature and high strain rate. The deformation activation energy and critical strains in dynamic recrystallization as well as dynamic recrystallization fraction model of 2. 25Cr1Mo steel were obtained. The constitutive equation of 2. 25Cr1Mo steel was constructed and the dynamic recrystallization physical metallurgical model of finite element software data interface was established. The model provides the basic conditions for the forging microscopic simulation of large forgings. 相似文献
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The elemental and phase composition and defect structure of the surface layer on 5140 steel is considered after alloying by melting of a film–substrate (5140 steel) system under irradiation by intense pulsed electron beam; the film consists of aluminum or titanium. Treatment of the titanium–5140 steel system results in alloying to the depth of the molten layer (about 15 μm); polycrystalline structure (with submicron grains) based on α-phase hardened by titanium-carbide nanoparticles is formed. For the aluminum–5140 steel system, only a thin surface layer (about 2 μm) is alloyed, on account of the evaporation of aluminum from the steel surface. Martensit structure hardened by iron-aluminide nanoparticles is formed. 相似文献
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通过理论计算确定氢离子辐照下武钢产SA738Gr.B钢位移损伤峰值的深度,对不同剂量辐照(0.2、0.5、1.0dpa)前后微观组织的特征和元素分布情况进行分析,判定离子辐照对SA738Gr.B钢的显微组织的影响.结果表明,通过高倍TEM观察以及STEM技术的分析,在SA738Gr.B钢基体中并未发现氢泡和大尺寸空位团,氢离子辐照下材料肿胀很小.通过对比0.5 dpa位移损伤量的微观组织与1.0 dpa位移损伤量的微观组织,可以明显看出,位移损伤量低的SA738Gr.B钢中的位错密度、位错环数量都大大降低.随着辐照剂量的提高,钢中位错密度和位错环数逐步增多,可以初步判定钢的辐照硬化效应程度. 相似文献
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采用可控速热处理炉对核压力容器用SA508Gr.4N钢消除组织遗传性现象进行研究。为模仿大锻件锻后不同位置晶粒尺寸差异较大现象,对试验钢进行不同温度预粗化处理。设计了A和B两种方案消除试验钢的组织遗传性,结果表明:经方案A即等温退火+亚温正火+正火处理后,得到细小且均匀的晶粒,晶粒等级由2~9级细化为7.5~8.0级,该方案可有效消除SA508Gr.4N钢的组织遗传性现象。观察了等温退火、亚温正火和高温回火后试验钢组织的变化,分析了微观组织变化对消除试验钢组织遗传性的影响。 相似文献
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