Analysis of the Liquid State Fabrication Process of High Alloy Cast Iron-Ceramic Fiber Composites

高合金铸铁-陶瓷纤维复合材料的液态制备过程分析

基本信息

批准号：
03650557
负责人：
OGI Keisaku
金额：
$ 1.47万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650557/
关键词：
Composites Casting High Alloy Cast Iron Ceramics Infiltration Process Wettability Interface Reaction Abrasion 高金合鋳鉄

项目摘要

The wetting angles of molten cast irons containing 0-25%Cr,15%Cr-5%V or 15%Cr-0.5%Ti were measured on smooth transparent Al_2O_3 substrates by the sessile drop method. The wetting angles of these molten alloys were among 105ﾟand 125ﾟat the melting points,and they decreased with the increase in Ti or V content. The higher surface roughness and porosity of substrates decreased the wettability.The apparent contact angles(theta)of these substrates were evaluated by Cassie's equation. Further,the wettability and the interface reaction of the above cast iron melts on sintered ZrO_2,SIA LON,Si_3N_4,SiC and WC were also clarified.The infiltration process of molten metal into fibrous perform,heated to the same temperature as the molten metal,was simulated by using Al-5.5%Cu alloy melt.The average permeability(Ka)and the average fiber radius(Rfa)were obtained experimentally from the pressure profile. The perform was assumed to be composed of 20 different permeability(K)and hydraulic mean radius(Rh)regions,and the simulation of fluid flow in the perform revealed that the pressure gradually increased as the infiltration proceeded to smaller Rh regions.The squeeze casting of various molten alloy cast irons into pre-heated Al_2O_3 short fiber perform was conducted.In this case,the solidification of molten metal made the Rh smaller,and caused many small pores especially in 15%Cr-5%V cast iron.The solidification processes of these alloys were as follows. After the crystallization of primary austenite(gamma) on Al_2O_3 short fibers,gamma-VC,gamma-(CrFe)_7C_3, or gamma-(FeCr)_3C eutectic solidified according to the composition of cast iron.The abrasion wear registance of Fe-2.7%C-1.5%Cr-1%Mo-0.4%Si-0.8%Mn cast iron with about 8vol.%Al_2O_3 short fibers was investigated by Suga-type wear testing machine.The wear rate of the cast iron with Al_2O_3 fibers decreased under 1/2 of that of the fiber-free cast iron of the same chemical composition.

通过连续透明的AL_2O_3底物测量了含有0-25％Cr，15％Cr-5％V或15％CR-0.5％Ti的熔融铸铁的润湿角，通过梗死方法测量了脚梗液。这些熔融合金的润湿角在熔点处的105 ﾟ和125°，并且随着Ti或V含量的增加而降低。底物的较高表面粗糙度和孔隙率降低了润湿性。这些底物的明显接触角（Theta）通过Cassie方程评估。此外，还阐明了上述铸铁在烧结的Zro_2，Sia Lon，Si_3n_4，SIC和WC上融化的润湿性和界面反应。使用Al-5.5％Cu Elloy Melt（ka）渗透到纤维性能中的熔融金属的渗透过程（熔融金属的渗透过程）加热到与熔融金属相同的温度。从压力轮廓实验中获得。假定性能由20种不同的渗透率（K）和液压平均半径（RH）区域组成，并且性能中流体流的模拟模拟表明，随着渗透率进行较小的RH区域，压力逐渐增加。各个较小的RH区域的挤压铸造的各种熔融合金铸造irons irons irons short al_2O_2的熔融效果较小的固定型固定型固定的固定均可固定的固定效果。小毛孔，尤其是在15％Cr-5％V铸铁中。这些合金的凝固过程如下。在Al_2O_3的初级奥氏体（γ）结晶后，γ-VC，γ-VC，γ-（CRFE）_7C_3或伽马 - （FECR）_3C Eutectic固定在铸铁的组成中，涂层的磨料磨损率与Fe-2.7％Cr-1％CR-1％CR-1％Mo-0.4％MON.4％MON.4％MON.4％MON.4％MON-0.4％MON-0.4％MON-0.4％S-MON MON.4 MON.4 MON.4 MON.4 MON.4 MON.4 MON.4 MON.4 MON.4 MON.4 MON.4 MON.4 MON MO-0.4 MON.4 MON.4 MON.4 MO-0.4 MO-0.4 MO-S-0.4 MO-S-MO-SN 8vol。由Suga型磨损测试机进行了调查。铸铁带Al_2O_3纤维的磨损速率在同一化学成分的纤维富含铸铁的1/2下降低。