刘耀辉
,
何镇明
,
于思荣
,
刘淑范
,
李庆春
材料研究学报
本文探讨了Nb、Ce 对Al_2O_3-中Mn 钢界面润湿、界面反应和结构以及对界面结合强度的影响.试验表明:加入Nb,Ce 可以使润湿角显著下降,由不润湿转化为润湿.Nb 改善润湿性的机制是界面吸附,而不产生界面反应,界面仍属于机械或润湿结合类型;Ce 改善润湿性的机制是界面反应,其反应产物主要是CeAlO_3,属反应型界面,适当的界面反应可以使界面结合强度显著提高.
关键词:
三氧化二铝
,
manganese steel
,
interface
叶昌松
,
魏耀武
,
李楠
耐火材料
doi:10.3969/j.issn.1001-1935.2016.02.009
为了研究含纳米 CaCO3的镁钙质中间包涂料在冶炼过程中对钢水中 Mn、C 和总氧含量的影响，按90％（w）电熔镁砂和10％（w）纳米 CaCO3并外加2％（w）的 SiO2微粉制成镁钙中间包涂料，并浇注成坩埚试样，自然养护24 h 后于200℃下烘烤24 h，然后将盛有锰钢的镁钙质坩埚放入感应炉中，抽真空后通入氩气并保持氩气流动，随后将炉温升至1100℃保温50 min，再继续升温至1600℃使钢样熔化，然后每隔一段时间对钢水取样，检测钢样的 Mn、C 和总氧含量，同时对试验后坩埚制样进行电镜和能谱分析。结果表明：在冶炼过程中，钢水中 Mn、C 含量降低，总氧含量增加，这与纳米 CaCO3分解产生的 CO2与钢中 Mn、C 元素的反应有关。
关键词:
纳米碳酸钙
,
镁钙质涂料
,
锰钢
,
洁净钢
,
中间包
J.P. Xie
,
H.L. Yuan
,
A.Q. Wang
,
W.Y. Wang
,
Y.R. Zhao
金属学报(英文版)
The mathematic calculation on two-body wear of austenitic manganese steel has been
performed by means of the elastic contact theory, stress interferometer and SEM.
Stress distribution in contacted area was calculated and the mechanism on two-body
wear has been investigated through numerical quadrature. Results show that two-body
wear is mainly plowing wear, the cracks of abrasive dust originates from the region
between 0.2® and 0.5® (® is radius of contacted round). Driving force to make crack
extension along y axis is ¿yzmax and extension direction is 45± with horizon. Driving
forces to make crack extension along x axis is alternative ¾x and ¿yzmax, the direction
of crack extension is 37。 with horizon.
关键词:
mathematic calculation
,
null
JIANG Qichuan HE Zhenming CHEN Yanping Jilin University of Technology
,
Changchun
,
China.
材料科学技术（英）
The abrasive wear behaviour of austenitic medium manganese steels was studied under weak corrosion-abrasive wear simulating the liner plate in wet metallic ore bail mill under non-severe impact-loading working condition. Results show that the work-hardening mechanism and the wear resistance of high carbon austenitic medium manganese steels differ from those of medium carbon austenitic medium manganese steel. Under non-severe impact and weak corrosion-abrasive wear,the wear resistances of high carbon and medium carbon austenitic medium manganese steels are 50-90% and 20-40% higher than that of Hadfield steel respectively.
关键词:
carbides
,
null
,
null
,
null
JIANG Qichuan HE Zhenming YAN Jiulin CUI Donghuan WANG Shoushi Jilin University of Technology
,
Changchun
,
China JIANG Qichuan Associate Professor
,
Faculty of Casting Technology
,
Jilin University of Technology
,
Changchun 130025
,
China
金属学报(英文版)
The needle-like and network carbides in as-cast high carbon wear-resistant manganese steels will be nodularized and dispersed,by a large majority,in austenite aider modifying treatment with Mg system agents.The impact toughness of the steels is significantly improved and the hardness is also increased to a certain extent.As a result,the steels can be used in as-casted state without any heat treatment and their wear resistance can be greatly enhanced.
关键词:
Mg modification
,
null
,
null
