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Influence of Cryogenic Treatment on Microstructure and Properties Improvement of die Steel

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Journal of Materials Science and Chemical Engineering 2015年第9期3卷 37-46页

作者： Shangtan Liu Xiaochun Wu Lei Shi Yiwen Wu Wei Qu Material Science and Engineering School Shanghai University Shanghai China

Cryogenic treatment has been increasingly applied to enhance the hardness, antiwear ability and fatigue performance of die steel. On the basis of reading a large number of research papers and references across the world, the author makes a detailed analysis and brief summary of the influence of cryogenic treatment on microstructure after quenching process or quenching plus tempering process, on first and second carbides, on content of retained austenite, on surface hardness, on mechanical properties and antiwear ability of die steels. It’s proved that cryogenic treatment on die steel significantly improves its hardness, antiwear capacity and service life. It’s the cryogenic process to make die steel have higher hardness, better antiwear ability, better ductility and longer service life because cryogenic process actually has a good influence on die steel of its microstructure, retained austenite volume and amount and size of the second carbide.

关键词： die Steel Cryogenic Treatment Retained Austenite The Second Carbide Antiwear Ability

Effects of Pressure on the Mechanical Properties and Microstructure of die Cast Aluminum A380 Alloy

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Journal of Minerals and Materials Characterization and Engineering 2014年第3期2卷 248-258页

作者： Kenneth N. Obiekea Shekarau Y. Aku Danjuma S. Yawas Department of Mechanical Engineering Ahmadu Bello University Zaria Nigeria

In this paper, the mechanical properties and microstructure of die cast aluminium A380 alloy casts produced under varying pressure was investigated experimentally and compared. The results obtained show better mechanical properties i.e. hardness, tensile strengths and impact strengths in the die cast A380 alloy sample that solidified at high pressure when pressure was regulated across five samples of the castings. The hardness of the die cast A380 samples that solidified under different applied pressures varied from 76 to 85 HRN. Also tensile strength, yield strength and elongation of the samples showed an increase with increased pressure. Also the results of SEM and metallography show that at high pressure, structural changes occurred as a fine microstructure was obtained with increase of pressure.

关键词： A380 Alloy die Casting Microstructure Pressure

Effect of Anisotropy,Temperature,Strain Rate on Deep Drawing Using Conical die

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Journal of Metallic Material Research 2020年第1期3卷 20-24页

作者： Ajay Kumar Choubey C.Sasikumar Department of Mechanical Engineering SIRTBhopalIndia Department of MME MANITBhopalIndia

This paper covers the role of anisotropy,temperature,and strain rate on the flow behavior of the material when a conical die is used instead of conventional blank *** effect of anisotropy was investigated using Lankford’s coefficient(r)in three directions(0°,45°,and 90°).The effect of working temperatures(Room temperature,100°C-300°C)on drawing stress and strain rate sensitivity on punch pressure were also investigated in *** APDL was used to investigate the effects of temperature,strain rate and *** simulation results have confirmed that the strain variation in the direction of r0 and r45 are more than the variation of r90.

关键词： Blank-holder Conical die Deep drawing

Alles rund um die Bahnreise

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德语学习 2010年第3期 23-26页

作者：祁心大连外国语学院德语系

在德国生活自然免不了乘坐火车，德国铁路系统非常复杂，同时车票的种类也花样繁多，对于初到德国的人来说很容易丈二和尚摸不到头脑。万一买错了票，坐错了车，一不小心就成了“Schwarzfahrcr”，虽然查票的人很有礼貌地说“IhreFahrka... 详细信息

在德国生活自然免不了乘坐火车，德国铁路系统非常复杂，同时车票的种类也花样繁多，对于初到德国的人来说很容易丈二和尚摸不到头脑。万一买错了票，坐错了车，一不小心就成了“Schwarzfahrcr”，虽然查票的人很有礼貌地说“IhreFahrkarte，bitte!”，但还是要面对被罚款的命运。

关键词：《Alles rund um die Bahnreise》德语学习学习方法阅读

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50 Things to Do Before I die

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大学英语 1999年第1期 7-8页

作者：张社列

Ｉｆｙｏｕｗａｎｔｔｏｋｎｏｗｗｈａｔｓｒｅａｌｙｉｍｐｏｒｔａｎｔｔｏｙｏｕ，ｍａｋｅａｌｉｓｔ如果你想知道什么事情对你很重要，那就列出一个表ＡｆｅｗｗｅｅｋｓａｇｏＩｆｏｌｏｗｅｄａｆｒｉｅｎｄｉｎｔｏａｎａｒ... 详细信息

Ｉｆｙｏｕｗａｎｔｔｏｋｎｏｗｗｈａｔｓｒｅａｌｙｉｍｐｏｒｔａｎｔｔｏｙｏｕ，ｍａｋｅａｌｉｓｔ如果你想知道什么事情对你很重要，那就列出一个表ＡｆｅｗｗｅｅｋｓａｇｏＩｆｏｌｏｗｅｄａｆｒｉｅｎｄｉｎｔｏａｎａｒｔｓｕｐｐｌｙｓｔｏｒｅ．Ｉｆｏ...

关键词： Before die Do Things to

On AFfinity:Balzac’s La Comédie Humaine in Henry James’ The American

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上饶师范学院学报 1998年第1期 95-98页

作者：  Gui\ Qingyang 

ＯｎＡｆｉｎｉｔｙ：Ｂａｌｚａｃ’ｓＬａＣｏｍéｄｉｅＨｕｍａｉｎｅｉｎＨｅｎｒｙＪａｍｅｓ’ＴｈｅＡｍｅｒｉｃａｎＧｕｉＱｉｎｇｙａｎｇＡＢＳＴＲＡＣＴＴｈｅｐｒｅｓｅｎｔｐａｐｅｒｉｓｉｎｔｅｎｄｅｄｔｏｓｈｏｗ... 详细信息

ＯｎＡｆｉｎｉｔｙ：Ｂａｌｚａｃ’ｓＬａＣｏｍéｄｉｅＨｕｍａｉｎｅｉｎＨｅｎｒｙＪａｍｅｓ’ＴｈｅＡｍｅｒｉｃａｎＧｕｉＱｉｎｇｙａｎｇＡＢＳＴＲＡＣＴＴｈｅｐｒｅｓｅｎｔｐａｐｅｒｉｓｉｎｔｅｎｄｅｄｔｏｓｈｏｗｔｈｅｄｅｇｒｅｅｏｆａｆｉｎｉｔ...

关键词： On Humaine die Henry James The Com American AFfinity La

AIDS-Ein Lehrpfad durch die Ethik in der Medizin

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暨南大学学报(自然科学与医学版) 1998年第6期 39-40页

ＵｎｓｃｈｕｌｄＰ．Ｕ．（ＩｎｓｔｉｔｕｔｆüｒＧｅｓｃｈｉｃｈｔｅｄｅｒＭｅｄｉｚｉｎ．Ｌｕｄｗｉｇ－ＭａｘｉｍｉｌｉａｎＵｎｉｖｅｒｓｉｔｔ，８０３３６Ｍüｎｃｈｅｎ）ＤｉｅＫｏｎｆｒｏｎｔａｔｉｏｎｄｅｒｗｅｓ... 详细信息

ＵｎｓｃｈｕｌｄＰ．Ｕ．（ＩｎｓｔｉｔｕｔｆüｒＧｅｓｃｈｉｃｈｔｅｄｅｒＭｅｄｉｚｉｎ．Ｌｕｄｗｉｇ－ＭａｘｉｍｉｌｉａｎＵｎｉｖｅｒｓｉｔｔ，８０３３６Ｍüｎｃｈｅｎ）ＤｉｅＫｏｎｆｒｏｎｔａｔｉｏｎｄｅｒｗｅｓｔｌｉｃｈｅｎＩｎｄｕｓｔｒｉｅｌ...

关键词： AIDS-Ein durch Ethik Lehrpfad die Medizin der

How die Private Jets of America selling so far in 2019?

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今日民航 2019年第3期 92-93页

作者： Jet Tolbert 不详

TO sum up the year so far, the used business jet market started2019 slowly, but as things appear to be heating up many of the dealers and brokers I speak with are generally happy with the shape of today’s market and are regularly completing *** what does the quickening in activity that we’re seeing mean for today’s buyers and sellers?

关键词： How die Private Jets of America selling so far in 2019

Wie ich die Welt sehe

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德语学习 2011年第2期 14-17页

作者： Albert Einstein

Wie merkwrdig ist die Situation von uns Erdenkindern!Fr einen kurzen Besuchist jeder *** weiβnicht wofr,aber manchmal glaubt er,es zu f*** Standpunkt des tglichen Lebens ohne tiefere Reflexion weiβ manaber... 详细信息

关键词：《Wie ich die Welt sehe》德语学习学习方法阅读

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