Nature of the increased plasticity of sintered powder metallurgy corrosion resistant PRKh18N10S steel

I. P. Bardin Central Scientific-Research Institute for Ferrous Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 8, pp. 48–49, August, 1990.     

大学批判本性探析

批判是大学的本质属性,大学正是以理性主义和理想主义为基石,从它诞生之日起就是社会的批判中心,追求理想和诉诸理性是大学批判本性核心要素的解构。因此,从大学之批判的本性入手,才能更好把握大学批判精神的内涵。     

2.25Cr-1Mo不锈复合钢板厚壁容器的焊接

主要介绍了2.25Cr-1Mo不锈复合钢板的焊接工艺试验和工艺评定，阐明了2.25Cr-1Mo锈复合钢板焊接工艺的可行性，实践证明，该工艺能满足使用要求。     

Comparison of the corrosion of bulk amorphous steel with conventional steel

The corrosion behaviour of one prominent bulk amorphous steel (BAS) alloy, (Fe_44.3Cr₅Co₅Mo_12.8Mn_11.2C_15.8B_5.9)_98.5Y_1.5, is compared to that of its crystalline counterpart and of the conventional steel X210Cr12. In acidic solutions, due to its single-phase nature, the BAS exhibits a much higher stability than the multiphase crystalline counterpart and the conventional steel. With increasing pH value, the overall elemental composition plays a more important role and the reactive elements Mo, Mn and Co, are assumed to be responsible for the observed lower stability of the BAS and its crystalline counterpart as compared to the conventional steel.     

调整品种结构优化轧钢工艺提高国产钢材的市场竞争力--在2000年轧钢生产技术工作会议上的讲话(摘录)

总结了近年来轧钢生产技术取得的成绩 ;指出轧钢工艺、装备和产品结构调整的目标和基本思路 ;提出今明两年轧钢工作的重点。     

GJW50钢结硬质合金螺纹钢丝轧辊的研制

介绍了一种用锻造态的 GJW5 0钢结硬质合金制作的螺纹钢丝轧辊 ,对其进行热处理强化 ,其使用价值明显高于合金钢和硬质合金的轧辊     

水资源保护的＂两面性＂

在中国,参与森林植被和湿地保护和恢复的个人或机构可以从政府那里获得报酬。这一做法,标志着中国已成为全球环保领域的创新者。 森林趋势组织最近发表了《2012年流域服务支付状况》报告。效力于亚洲发展银行和中国农业政策研究中心的驻京环境经济学家迈克尔·贝内特是该报告的参与者之一。他认为,这份报告在一定程度上展现出中国政府在水处理问题上的“两面性”。在以精细化,低成本的手段保护水资源方面,中国的确走在了世界的前列。可是还有一个重要事实,那就是中国也正面临着越来越严峻的水资源短缺问题,这也使水域保护问题受到了前所未有的关注,并且还将吸引大量的投资。     

Nature of the dark component in carbonitrided steels

Conclusions The so-called dark component in carbonitrided steels consists of pores filled with molecular nitrogen precipitated in the pores after some critical activity in austenite is reached. The effect of carbon and alloying elements on the formation of the dark component results from their effect on the thermodynamic activity of nitrogen.Moscow State University. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 11–15, January, 1977.     

Investigation on the mechanism of steel/steel solid-state bonding at low temperatures

The solid-state bonding of ultralow-carbon steels was conducted by hot pressing and subsequent isothermal holding at low temperatures ranging from 873 to 923?K. The evolution of the interfacial strength was found to consist of two stages; the first stage, where the increase in interfacial strength is rapid and significant, and the second stage, where the increase is gradual. The evolution of strength in the first stage primarily takes place in contact regions produced by hot pressing. In the second stage, on the contrary, the evolution seems to result from the increase in the contact regions due to the shrinkage of voids. A molecular dynamics simulation was performed to clarify the atomic behaviour at the interface during the first stage. The results revealed that the disordered atomic arrangement caused by compression was rearranged with increasing isothermal holding time, leading to improved coherency between the contact regions and increased interfacial strength.     

石材性质对锯切力的影响

本文通过研究岩石锯切力计算公式,讨论了工件材料微观结构分布不均匀和非线性特征对锯切力的影响。该研究有助于更加合理地选择锯切参数。