检索结果-南通市图书馆

Development and Application of Non-Quenched and Tempered steel for Auto Forging Components in china

在线全文

学校读者我要写书评

暂无评论

Journal of iron and steel research International 2011年第S1期18卷 735-741页

作者： ZHANG Ying-jian 1,CHEN Si-lian 1,DONG Han 1,HUI Wei-jun 1,PENG Jun 2 (1.institute for Structural Materials,central iron & steel research institute,beijing 100081,china 2.School of Physical Science and Technology,Yunnan University,Kunming 650091,Yunnan,china) Cent iron & steel Res Inst Inst Struct Mat Beijing 100081 Peoples R China Yunnan Univ Sch Phys Sci & Technol Kunming 650091 Yunnan Peoples R China

Non-quenched and tempered (NQT) steels have been applied for auto forging products at the aim of lower cost since 1980’s in *** quenching and tempering processes,the cost of heat treatment was greatly decreased,so they are widely applied in car forgings such as crankshaft,connecting ***,with the aim of improving performance and reducing production cost,new technologies,such as:reductions of microalloyed elements,microstructure refining,and mechanical properties forecast have been developed in china auto *** designation,processing,properties prediction and microstructure of auto components have been controlled *** the development of new technologies,NQT steel gradually began to be applied to product important parts,and replace Quenching and Tempering (QT) *** steel makers and end product users are expressed their desire to share benefits of technological *** technologies will have a huge developing space and very bright developing prospects in motor parts industry in future.

关键词： NQT steel microstructure and property forecast lower cost forging

DEFORMATION BEHAVIOUR OF TiAl-V INTERMETALLIC COMPOUND AT ELEVATED TEMPERATURES

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1990年第8期3卷 142-144页

作者： PU Zhongjie CAI Qigong ZHU Jing central iron and steel research institute,Ministry of Metallurgical Industry,beijing,china PU Zhongjie,Laboratory of Physics,central iron and steel research institute,Ministry of Metallurgical Industry,beijing 100081,china

The effect of V on the high temperature deformation behavior has been investigated by using double-notch shear *** experiment results revealed that the V additive can improve the ambient temperature ductility and decrease the ductile-brittle transition *** strength of TiAl compound with the additive of V increases with the increase of temperature up to the peak value at 700℃ approximately.

关键词： intermetallic compound TiAl plastic deformation

LATTICE PARAMETERS OF COMPLEX CARBONITRIDE CONTAINING Ti,Nb AND V

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1990年第9期3卷 211-213页

作者： XU Wenchong SUN Fuyu central iron and steel research institute,Ministry of Metallurgical Industry,beijing,china XU Wenchong Senior Engineer,Dept.No.13,central iron and steel research institute,Ministry of Metallurgical Industry,beijing 100081,china

The lattice constants and chemical composition of Ti,Nb and V precipitates with different particle sizes have been measured hy means of CBED and *** was obtained that the concentration ratio Of Nb and V,C_(Nb)/C_V,and the lattice constants in the Nb-V steel de- crease with the decrease of the particle size of the precipitates,but there is no regularity for tattice constant of Ti,N b and V precipitate against their particle size in the Ti-V-Nb steel.

关键词： microalloyed steel carbonitride lattice constant

KINETICS OF STRAIN-INDUCED PRECIPITATION OF (Nb,V) CARBONITRIDE IN A MICROALLOYED steel

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1989年第2期2卷 113-118页

作者： XU Wenchong SUN Fuyu ZHAO Peixiang central iron and steel research institute,Ministry of Metallurgical Industry,beijing,china XU Wenchong Senior Engineer,central iron and steel research institute,Ministry of Metallurgical Industry,beijing,china

The kinetics of the isothermal precipitation of(Nb,V)CN in Nb-V alloys has been investi- gated by using the Formastor-press simulator and the extraction replica *** four deformation amounts(0,10,30,50%)and three tempe... 详细信息

关键词： Nb-V microalloy kinetics isothermal strain-induced precipitation particle size

DYNAMICS OF PRECIPITATION AND TRANSFORMATION OF CARBIDES IN A Ni-BASE SUPERALLOY

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1989年第3期2卷 181-185页

作者： HUANG Qianyao SHI Yanyu central iron and steel research institute,Ministry of Metallurgical Industry,beijing,china Department No.5,central iron and steel research institute,Ministry of Metallurgical Industry,beijing,china

The quantitative analytical method combining the electrolytic extraction with X-ray diffraction analysis to determine the carbides and TCP in a Ni-base superalloy was *** variation of decomposition of MC and precipitation of M_(23)C_6 and M_6C with hot exposure time at 850—1000℃ is shown to conform to hyperbolic *** elemental con- stitution of M_(23)C_6 changes continutously during the hot exposure *** the primary stage the constitution of the precipitates is(Cr_(0.67)Mo_(0.13)Ni_(0.13)Co_(0.07))_(23)C_*** with in- creasing Cr and decreasing Mo,Ni and Co it finally becomes(Cr_(0.88)Mo_(0.07)Ni_(0.03)Co_(0.02))_(23)C_6. The higher the hot exposure temperature,the faster the final constitution of M_(23)C_6 may be achieved.

关键词： Ni-base superalloy carbides hot exposure electrolytic extraction X-ray diffraction analysis

Effect of Sulfur Contents on Fracture Toughness of Wheel steels for High Speed Train

在线全文

学校读者我要写书评

暂无评论

Journal of iron and steel research International 2011年第S1期18卷 366-371页

作者： MA Yue 1,PAN Tao 1,JIANG Bo 2,YANG Cai-fu 1,SU Hang 1,CUI Yin-hui 2,CHEN Gang 2 (1.Division of Structural Materials,central iron and steel research institute,beijing 100081,china 2.Technology Centre,Ma’anshan iron and steel Co Ltd.,Ma’anshan 243000,Anhui,china) Cent iron & steel Res Inst Div Struct Mat Beijing 100081 Peoples R China Maanshan iron & steel Co Ltd Ctr Technol Maanshan 243000 Anhui Peoples R China

The effect of different contents of S on fracture toughness of railway wheel steels for high speed train has been *** results show that there are kinds of non-metallic inclusion when O content retaining at about 10×10-6,such as Al 2 O 3 inclusions and Al 2 O 3 +MnS complex inclusions and single MnS *** is connected with S content level in *** toughness of railway steel increase obviously because of Al 2 O 3 covered by MnS around when S content is increase to about 70×*** shows that,after Al 2 O 3 covering by MnS around,stresses around complex inclusion decrease rapidly till disappear when analyzed by tessellated stresses *** is the reason of fracture toughness rise.

关键词： railway wheel steels fracture toughness inclusions tessellated stresses

Thermodynamic Behaviour of Fe-S-RE,Fe-Csat.-S-RE,Ni-S-RE,Cu-S-RE Solutions

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 1993年第1期9卷 68-70页

作者： Ting DU Longmei WANG Yeming WU Yuqing ZHANG Aisheng LIU central iron and steel research institute,beijing,100081,china

The temperature dependences of the equilibrium constants for the reactions RES_((S))=[RE]+[S]. (RE=Ce,La,Nd,Sm,Y),of the standard Gibbs energies for the RES formed and of the interaction coefficients between RE elemen... 详细信息

关键词： thermodynamics rare earth Fe Ni Cu-base solutions

Finite Element Analysis of Die Geometry and Process Conditions Effects on Equal Channel Angular Extrusion for β-Titanium Alloy

在线全文

学校读者我要写书评

暂无评论

Journal of iron and steel research International 2012年第10期19卷 54-58页

作者： SI Jia-yong1,2, GAO Fan3, ZHANG Ji3 (1. State Key Laboratory of Powder Metallurgy, central South University, Changsha 410083, Hunan, china 2. College of Mechanical and Electrical Engineering, central South University of Forestry and Technology, Changsha 410004, Hunan, china 3. High Temperature Material research Division, central iron and steel research institute, beijing 100081, china) [a] State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 Hunan China [b] College of Mechanical and Electrical Engineering Central South University of Forestry and Technology Changsha 410004 Hunan China [c] High Temperature Material research Division Central Iron and Steel Research Institute Beijing 100081 China

The finite element analysis was applied to evaluate the respective influences of die geometry and process conditions on plastic strain distribution for β-titanium (Ti-13V11Cr3Al) alloy during the equal channel angular extrusion (ECAE). It was found that optimum equal channel angular extrusion die geometry is strongly material dependent. Optimal strain homogeneity in the Ti-13V11Cr3Al alloy may be achieved at r (inner radius)=5 mm, R (outer radius)=3 mm. The equivalent plastic strain increases with increasing friction coefficient. And the better homogeneity of the equivalent plastic strain distribution can be achieved when friction coefficient value is lower. The faster the ram speed is, the lower the homogeneity of the equivalent plastic strain distribution is and the influence is slight. The back-pressure does not help to improve the plastic strain homogeneity, and the increasing temperature has a slightly favourable effect on the plastic strain homogeneity between 400 and 600 ℃.

关键词： equal channel angular extrusion finite element analysis die geometry β-titanium

MICROSTRUCTURE AND RESISTANCE TO LOCALIZED CORROSION OF DEFORMED 18-5-Nb DUPLEX STAINLESS steel

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1989年第9期2卷 172-176页

作者： ZHAO Pu LU Shiying central iron and steel research institute,Ministry of Metallurgical Industry,beijing,,china ZHAO Pu Engineer,central iron and steel research institute,Ministry of Metallurgical Industry,beijing,china

The SCC susceptibility of the plastically pre-deformed 18-5-Nb duplex stainless steel to lo- calized corrosion was evaluated in both 25% NaCl+1% K_2Cr_2O_7 and 42% MgCl_2 boiling so- *** y phase in the steel is metastable at room temperature and the γ-α′ martensitic transformation can be induced by cold plastic *** the increase in cold deformation,the volume fraction of α′ martensite *** plastic deformation results in a remarkable deterioration of SCC resistance of the steel in chloride-containing solutions, resulting from the decrease in corrosion resistance of γ phase in the *** is indicated that, in NaCl solution,the SCC in 18-5-Nb duplex stainless steel initiates at pits and the selective attack on γ phase plays a significant role in the initiation and propagation of SCC.

关键词： duplex stainless steel plastic deformation stress corrosion cracking