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| 1 | Microstructure and Mechanical Properties of Martensitic Stainless Steel 6Cr15MoV显示文摘Martensitic stainless steel containing Cr of 12% to 18% (mass percent) are common utilized in quenching and tempering processes for knife and cutlery steel. The properties obtained in these materials are significantly influenced by matrix composition after heat treatment, especially as Cr and C content. Comprehensive considered the hardness and corrosion resistance, a new type martensitic stainless steel 6Cr15MoV has been developed. The effect of heat treatment processes on microstructure and mechanical properties of 6Cr15MoV martensitic stainless steel is emphatically researched. Thermo-Calc software has been carried out to thermodynamic calculation; OM, SEM and TEM have been carried out to microstructure observation; hardness and impact toughness test have been carried out to evaluate the mechanical properties. Results show that the equilibrium carbide in 6Cr15MoV steel is M23C6 carbide, and the M23C6 carbides finely distributed in annealed microstructure. 6Cr15MoV martensitic stainless steel has a wider quenching temperature range, the hardness value of steel 6Cr15MoV can reach to HRC 60.8 to HRC 61.6 when quenched at 1 060 to 1 100 ℃. Finely distributed carbides will exist in quenched microstructure, and effectively inhabit the growth of austenite grain. With the increasing of quenching temperature, the volume fraction of undissolved carbides will decrease. The excellent comprehensive mechanical properties can be obtained by quenched at 1 060 to 1 100 ℃ with tempered at 100 to 150 ℃, and it is mainly due to the high carbon martensite and fine grain size. At these temperature ranges, the hardness will retain about HRC 59.2 to HRC 61.6 and the Charpy U-notch impact toughness will retain about 17.3 to 20 J. A lot of M23C6 carbides precipitated from martensite matrix, at the same time along the boundaries of martensite lathes which leading to the decrease of impact toughness when tempered at 500 to 540 ℃. The M3C precipitants also existed in the martensite matrix of test steel after tempered at 500 ℃, and the mean size of M3C precipitates is bigger than that of M23C6 precipitates. | MA Dang-shen1, CHI Hong-xiao1,2, ZHOU Jian1, YONG Qi-long1,2 (1. Institute for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, China 2. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China) | 2012 | Journal of Iron and Steel Research(International)2012，19，3： | 8 |
| 2 | AN ASSESSMENT OF INTERACTION PARAMETERS IN BINARY METALLIC SYSTEMS显示文摘1.IntroductionTheinteractionparameterformalismfirstdevelopedbyWagnerisextensivelyusedtorepresentthethermodynamicpropertiesofdilutesolutionsparticularlyformetalalloys.Sointeractionparametersareindispensabletomakethermodynamicanalysisfortherelevantmeta... | Z. T. Ma and D. Janke(Institute of Iron and Steel Technology, Freiberg University of Mining and Technology, Germany) | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，2： | 2 |
| 3 | Improvement in the Oxidation Resistance of Tungsten by Sol-Gel Derived Al_2O_3 Coating显示文摘An Al2O3 coating was prepared from aluminum isopropoxide as precursor on tungsten substrate.The dependences of crystalline and phase in Al2O3 coating on temperature were studied.The results show the coatings being compact,uniform and crack-free can be obtained by suitable experiment.The main phase of coating is α-Al2O3.Compared to the uncoated specimens,the ones with coatings synthesized by sol-gel process provide excellent oxidation resistance at high temperature. | Fan Ailing1,Meng Lingsheng1,Huang Lang1,2,Ma Jie1 1 College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China 2 Department of Safety and Environment,Xinyu Iron&Steel Group Co.Ltd,Xinyu 338001,China | 2012 | 稀有金属材料与工程2012，41，S1： | 2 |
| 4 | Neurosurgical treatment for addiction:lessons from an untold story in China and a path forward显示文摘Addiction is a major public-health crisis associated with significant disability and mortality.Although various pharmacological and behavioral treatments are currently available,the clinical efficacy of these treatments is limited.Given this situation,there is a growing interest in finding an effective neurosurgical treatment for addiction.First,we discuss the use of ablative surgery in treating addiction.We focus on the rise and fall of nucleus accumbens ablation for addiction in China.Subsequently,we review recent studies that have explored the efficacy and safety of deep-brain-stimulation treatment for addiction.We conclude that neurosurgical procedures,particularly deep-brain stimulation,have a potentially valuable role in the management of otherwise intractable addictive disorders.Larger well-controlled clinical trials,however,are needed to assess clinical efficacy and safety.We end by discussing several key issues involved in this clinical field and identifying some areas of progress. | Shuo Ma Chencheng Zhang Ti-fei Yuan Douglas Steele Valerie Voon Bomin Sun | 2020 | National Science Review2020，7，3： | 2 |
| 5 | Evidence for neuro-peptide Y synthesis in therat anterior pituitary and the influence of thyroid hormone status: comparision withvasoactive intestinal peptide, substance P, and neurotensin显示文摘 | Jones P M Ghatei MA Steel J | 1989 | Endocrinology1989，125，1： | 1 |
| 6 | Sporadic cases of haemolytic -uremic syndrome associated with faecal cytotoxin and cytotoxin--producing Escherichia coil in stools显示文摘 | Karmali MA Steele BT Petric M | 1983 | Lancet1983，1，： | 1 |
| 7 | Cancer chemoprevention agent development strategies of genistein显示文摘 | Steele VE Pereira MA Sigman T | 1995 | J Nutr1995，125，： | 1 |
| 8 | Prospective analysis of the effect of physician experience with the FAST examination in reducing the use of CT scans显示文摘 | Ma O J Gaddis G Steele M T | 2005 | Emerg Med Australas2005，17，1： | 1 |
| 9 | The effect of X4 and R5 HIV-1 on C,C-C,and C-X-C chemo- kines during the early stages of infection in human PBMCs 显示文摘 | Wetzel MA Steele AD Henderson EE | 2002 | Virology2002，292，1： | 1 |
| 10 | Prospective analysis of the effect of physician experience with the FAST examination in reducing the use of CT scans 显示文摘 | Ma O J Gaddis G Steele MT | 2005 | Emerg Med Australas2005，17，1： | 1 |
| 11 | Tongue pressure profile training for dysphagia post stroke (TPPT) : study protocol for an exploratory randomized eontrelled trial显示文摘 | Steele CM Bayley MA P61adeau-Pigeon M | 2013 | Trials2013，14，： | 1 |
| 12 | Sporadic cases of haemolytic uremic syndrome associated with faecal cytotoxin and cytotoxin-producing Escherichia coli in stools显示文摘 | Karmali MA BT Steele M Petric | 1983 | Lancet1983，，： | 1 |
| 13 | Global rotavirus surveillance: determining the need and measuring the impact of rotavirus vaccines显示文摘 | Widdowson MA Steele D Vojdani J | 2009 | J Infect Dis2009，200，1： | 1 |
| 14 | Cancer chemoprevention agent development strategies of genistein 显示文摘 | Steele VE Pereira MA Sigman T | 1995 | J Nutr1995，125，： | 1 |
| 15 | Cancer chemoprevention agent development strategies for genistein显示文摘 | Steele VE Pereira MA sigman CC | 1995 | J Nutr1995，125，： | 1 |
| 16 | The effect of X4 and R5 HIV-1 on C,C-C,and C-X-C chemokines during the early stages of infection in human PBMCs显示文摘 | Wetzel MA Steele AD Henderson EE | 2002 | Virology2002，292，1： | 1 |
| 17 | Epidemiology of animal exposures presenting to emergency departments 显示文摘 | Steele M T Ma O J Nakase J | 2007 | Acad Emerg Med2007，14，5： | 1 |
| 18 | Evidence for neuropeptide Y synthesis in the rat anterior pituitary and the influence of thyroid hormone status: comparison with vasoactive intestinal peptide, substance P, and neurotensin 显示文摘 | Jones PM Ghatei MA Steel J | 1989 | Endocrinology1989，125，1： | 1 |
| 19 | Prospective analysis of the effect of physician erperience with the FAST examination in reducing the use of CT scans显示文摘 | Ma OJ Gaddis G Steele MT | 2005 | Emerg Med Australas2005，17，1： | 1 |
| 20 | Sporadic case of haemolytic-uraemic syndrome associated with faecal sytotoxin and cytotoxin-procucing Escherichia coli in stools 显示文摘 | Karmali MA Steele BT Patric M | 1983 | Lancet1983，1，： | 1 |
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