检索结果-南通市图书馆

Load dependent microstructural evolution in an as-cast 26%Cr high chromium cast iron during unlubricated sliding

Friction 2022年第8期10卷 1258-1275页

作者： U.Pranav NAYAK Sebastian SUÁREZ Valentin PESNEL Frank MÜCKLICH María Agustina GUITAR Department of Materials Science Saarland UniversitySaarbrücken 66123Germany Materials Engineering Center Saarland Saarbrücken 66123Germany Ecole Européenne d’ingénieurs en Génie des Matériaux Universitéde LorraineNancy 54000France

In the current study,an as-cast 26%Cr high chromium cast iron(HCCI)alloy was subjected to dry-sliding linear wear tests,under different *** loads were selected based on analytically computing the critical load(PC)i.e.,the load necessary to induce plastic *** PC was calculated to be 15 N and accordingly,a sub-critical load(5 N)and an over-critical load(20 N)were *** influence of increasing the load during the wear test was investigated in terms of the matrix microstructural behaviour and its ability to support the surrounding *** morphological aspects of the wear tracks,and the deformed matrix microstructure adjacent and underneath the track was analysed by confocal laser scanning microscope(CLSM)and scanning electron microscope(SEM),*** evidence of plastic deformation of the matrix was observed below *** the contrary,at loads equal to and higher than PC,the austenitic matrix plastically deformed as evidenced by the presence of slip *** backscattered diffraction(EBSD)measurements in terms of grain reference orientation deviation,and micro-Vickers hardness of the austenitic matrix indicated a deformation depth of about 40μm at the maximum applied load of 20 *** active wear mechanisms during sliding were a combination of both adhesive and abrasive wear,although increasing the load shifted the dominant mechanism towards *** was primarily attributable to the increased propensity for carbide cracking and fracturing,combined with the inability of the hardened austenitic matrix surface and sub-surface to adequately support the broken carbide ***,the shift in the dominant wear mechanism was also reflected in the wear volume and subsequently,the wear rate.

关键词： high chromium cast iron unlubricated sliding plastic deformation wear resistance carbide spallation matrix hardness

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Interface characteristics and wear resistance of Ni-B_(4)C plated ZTA reinforced high chromium cast iron composite

引用

China Foundry 2023年第3期20卷 253-262页

作者： Ke-liang Li Wei Li Yan-liang Yi Institute of Advanced Wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou 510632China National Joint Engineering Research Center of high Performance Metal Wear Resistant Materials Technology Jinan UniversityGuangzhou 510632China

A chemical composite plating of Ni-B_(4)C was used to prepare the surface-modified zirconia toughened alumina(ZTA)ceramic *** ceramic preforms were prepared by the plated ZTA and sodium silicate solution binder,followed by casting infiltration to prepare the ZTA particles reinforced high chromium cast iron(HCCI)*** result reveals that a distinct interface layer forms at the ZTA/HCCI interface,which consists of phases of ZrB_(2),FeB,Fe_(2)B,and NaSiO_(4).The interfacial wettability between ZTA and HCCI is improved by the diffusion and reaction of Ni and B_(4)*** wear test reveals that the Ni-B_(4)C plated ZTA particles can effectively improve the wear resistance of the ZTA/HCCI composite,and the wear rate of the composite is decreased to 11.6%of HCCI.

关键词： ZTA composite high chromium cast iron interface layer three-body abrasive wear

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of Cryogenic Treatment on Property of 14Cr2Mn2V high chromium cast iron Subjected to Subcritical Treatment

引用

Journal of iron and Steel Research International 2006年第6期13卷 43-48页

作者： LIU Hao-huai WANG Jun YANG Hong-shan SHEN Bao-luo GAO She-ji HUANG Si-jiu Metal Material Department Siehuan University Chengdu 610064 Sichuan China Department ofMechanical Measurement National Institute of Measurement and Testing Technology Chengdu 610021Siehuan China Sijiu Rare Earth Alloy Foundry Chengdu 610211 Siehuan China

Effect of cryogenic treatment on the microstructure, hardening behavior and abrasion resistance of 14Cr2Mn2V high chromium cast iron （HCCI） subjected to subcritical treatment was investigated. The results show that cryogenic treatment after subcritical treatment can obviously improve the hardness and abrasion resistance of HCCI because abundant retained austenite is transformed into martensite and fine secondary carbides E（Fe, Cr）23 C6 ] precipitate. The amount of martensite and precipitated secondary carbide in HCCI experiencing subcritical treatment followed by cryogenic treatment was more than that experiencing the subcritical treatment followed by air cooling. When the abrasion resistance of HCCI reaches the maximum, its microstructure contains about 15 % retained austenite. Cryogenic treatment can further reduce the austenite content but the retained austenite cannot be transformed in to martensite completely.

关键词： high chromium cast iron cryogenic treatment subcritical treatment martensite transformation abrasion resistance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

RESEARCH AND APPLICATION OF AS-cast WEAR RESISTANCE high chromium cast iron

引用

Chinese Journal of Mechanical Engineering 1998年第2期11卷 51-56页

作者： Liu, Jinhai Liu, Gensheng Li, Guolu Wang, Kunjun Zeng, Daben Hebei Univ of Technology China

The influence of alloy elements, such as boron and silicon, on the microstructure and properties of as cast high chromium cast iron is studied. The results show that boron and silicon have a great effect on the mechanical properties and the wear resistance. Through proper addition of boron and silicon, the properties of as cast high chromium cast iron can be improved effectively. Through analyzing the distribution of elements by scanning electron microscope, it has been shown that the addition of boron and silicon lowers the mass fraction of chromium saturated in as cast austenite, and makes it unstable and liable to be transformed into martensite. The as cast high chromium cast iron with proper content of boron and silicon is suitable for the manufacture of lining for asphalt concrete mixer and its wear resistance is 14 times that of lining made of low alloy white cast iron.

关键词： high chromium cast iron Hardness Wear resistance Impact toughtness Lining

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Abrasive Wear Behavior and Mechanism of high chromium cast iron

引用

Journal of iron and Steel Research International 2015年第1期22卷 84-90页

作者： Ting SUN Ren-bo SONG Xu WANG Peng DENG Chun-jing WU School of Materials Science and Engineering University of Science and Technology Beijing

The abrasive wear behavior of high chromium cast iron （containing 12.9 mass% chromium） austenitized at 1 050 ℃ for 2 h and austempered in salt bath at 320 ℃ for 4 h was evaluated. Abrasive wear was performed using alumina abrasive under four different loads, namely 50, 100, 150, and 200 N, for 36000 cycles. The worn surfaces and wear debris were analyzed by scanning electron microscopy, laser confocal microscopy and X-ray diffraction. Micro hard- ness profiles were also obtained in order to analyze the strain-hardening effects beneath the contact surfaces. Results indicate that the retained austenite in high chromium cast iron has experienced induced martensitic transformation af- ter tests, for small amounts of retained austenite could be detected by X-ray diffraction. In addition, there is a close relationship between wear mechanism and test load. Under the condition of lower test load, the wear mechanism is an uninterrupted and repeated process, during which matrix is cut at first and then fine carbides flake off. As to high- er test load, scratching and spalling induced by cleavage fracture of blocky carbide are the wear mechanism.

关键词： high chromium cast iron abrasive wear wear mechanism wear behavior martensitic transformation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of surface Cr/C infiltration on microstructure,mechanical properties and wear resistance of high chromium cast iron

引用

China Foundry 2022年第3期19卷 218-224页

作者： Peng Chen Zhao-yang Wu Yan-liang Yi Jian-bin Huang Tao Shang Wei Li Institute of Advance Wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou 510632China Shaoguan Research Institute of Jinan University Shaoguan 512027GuangdongChina Ningxia Tiandi Heavy Equipment Technology Co. Ltd.Yinchuan 753001NingxiaChina

A new type of high chromium cast iron(HCCI)was prepared,and its microstructure,mechanical properties,and abrasion resistance were investigated *** showed that after surface carburizing and chromizing,the microstructure of HCCI mainly consists of martensite,boride(M_(2)B),and carbide(M_(7)C_(3)),accompanied with a large amount of secondary precipitations M_(23)C_(6).Moreover,the morphology and hardness of the carbide and boride in HCCI change little,while the volume fraction of carbide and boride increases from 16.23%to 23.16%.This effectively increases the surface hardness of HCCI from 64.53±0.50 HRC to 66.58±0.50 HRC,with the result that the surface of HCCI possesses a better abrasion resistance compared to the center ***,the wear mechanism of HCCI changes from micro-plowing to micro-cutting with the increase of surface hardness.

关键词： high chromium cast iron carburizing and chromizing mechanical property abrasion resistance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

SPHERICAL MICROSTRUCTURE FORMATION OF THE SEMI-SOLID high chromium cast iron Cr20Mo2

引用

Acta Metallurgica Sinica(English Letters) 2004年第1期17卷 77-82页

作者： W.M.Mao A.M.Zhao X.Y.Zhong University of Science & Technology Beijing Beijing 100083 ChinaUniversity of Science & Technology Beijing Beijing 100083 ChinaUniversity of Science & Technology Beijing Beijing 100083 China

The nondendritic semi-solid slurry preparation of high chromium cast iron Cr20Mo2 has been studied in this paper. The experiments show that the proeutectic austenitic particles are more spherical under a larger stirring power condition, even if the stirring time is shorter, while the proeutectic austenitic particles are not very much spherical under a smaller stirring power condition and some proeutectic austenitic dendrites also exist, even if the stirring time is very long. The experiments also show that when stirred for 5-6 minutes under the test condition, the semi-solid slurry with 40vol.%-50vol.% solid fraction and spherical proeutectic austenite in the size of 50-80μm can be obtained.

关键词： high chromium cast iron semi-solid electromagnetic stirring

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of Ti-V-Nb-Mo addition on microstructure of high chromium cast iron

引用

China Foundry 2012年第2期9卷 148-153页

作者： Ma Youping Li Xiulan Liu Yugao Zhou Shuyi Dang Xiaoming School of Metallurgic Engineering Xi'an University of Architecture&TechnologyXi'an 710055China School of Mechanical and Electrical Engineering Qingdao Agricultural UniversityQingdao 266109China

The effects of trace additions of multi-alloying elements （Ti, Nb, V, Mo） on carbides precipitation and ascast microstructure of eutectic high chromium cast iron containing 2.85wt.%C and 31.0wt.%Cr were investigated from thermodynamic and kinetic considerations. The thermodynamic calculations show that Ti and Nb exist in the multi-alloying system in the forms of TiC and NbC. The formation of VC during the solidification is not feasible from the thermodynamic consideration. XRD analysis shows that the V exists in alloy compounds （VCr2C2, VCrFes）. The first precipitated high melting point particles （TIC, NbC） can act as the heterogeneous substrate of M7C3 carbides, which results in significant refinement of the M7C3 carbides. After the addition of alloying elements, C atom diffusion is hindered due to the strong affinities of the strong carbide forming elements for carbon, which decreases the growth rate of carbides. The combined roles of the increase of nucleation rate and the decrease of carbides growth rate lead to the finer microstructure.

关键词： high chromium cast iron microstructure alloying thermodynamics kinetics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect　of　RE　Complex　Inoculation　on　the　Fatigue　Wear　Behaviours　of　high　chromium　cast　iron

引用

Journal of Rare Earths 1995年第1期13卷 67-70页

作者：王久彬李庆春 Institute of iron & Steel Research Anshan Iron & Steel Complex Anshan 114001 China

Inoculation of high chromium cast iron is made by RE complex inoculant. Influence of inoculating on rolling fatigue wear characteristics of high chromium cast iron is investigated. The experimental resutls indicate that high chromium cast iron inoculated by RE complex inoculation is improved in structure and properties, i. e. fatigue wear sevice life is prolonged and relative wear resistance is increased greatly.

关键词： Rare earth Fatigue wear Complex inoculation high chromium cast iron

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of Vanadium and Rare-earth on Carbides and Properties of high chromium cast iron

Effects of Vanadium and Rare-earth on Carbides and Propertie...

引用

第五届国际材料与热加工物理模拟及数值模拟学术会议

作者： Wenmin ZHAO* Zilai JU Zhenxu LIU Bo LIAO Xueguang CHEN Department of Material Science and Engineering Hebei University of Technology Tianjin 300132 China

The type, shape and distribution of carbide take directly effect on the mechanical properties of high chromium castings. Vanadium is able to stabilize the structure of carbide in high chromium cast iron,meanwhile the hardness of carbide containing vanadium can reaches about 2800HV. In some cases, vanadium can also refine the microstructure. Rare-earth is able to change the shape of carbide in cast iron, refine the grain size of ferrite and improve the mechanical properties of castings. In this experiment, intention of adding vanadium and rare-earth is modification of mechanical properties with the proper heat treatment technology. With the help of TEM and SEM, the characteristics of carbide, such as shape,distribution and quantity can be observed and mechanical properties has been improved for better wear-resistance.

关键词： high chromium cast iron Carbide Modification.

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：