Manufacture Of 304 Stainless Steel Short Fibers Composite Plate And Mechanical Properties Research

The stainless steel fiber(SSF)porous body with 3D pore structure manufactured by weaving and suppression progress owned the characters of high strength,low density and low cost,which made it of great value of research and application potential.As the main material of the porous body,SSF possessed many good properties,such as,electrical conductivity,corrosion and heat resistance.It was generally used in fields of spinning,filtration,noise reduction and electromagnetic shielding.With more researches on SSF,it would be used in more fields.Resin in compound plate was used as base while 304 SSF used as reinforcement after the compound progress.It was a new material which got both characters of the original two kinds of materials and had good mechanical performance.The composite plate gained extremely good bearing capacity for the reason of high specific strength,high specific modulus.Because of the good corrosion resistance,parts made of composite plate could work in acid base environment which made it get high competitiveness in the field of electro-mobile.It got wide application prospect and development space.In this text,self-designed cutting device was used to fabricate 304 SSF and a controlling circuit was designed for protecting the device and ensuring the safety.Changing the weld structure of the cutter into mechanical fixing method improved the use ratio of alloy bit for 7 times.Also,it made the usage of knife-rest more efficient which low down the cost and helped the volume production of SSF.Service life tests of 3 kinds of cutters were done,and it was found that YBC251 coated cutting tool gets the best cutting properties.The invalid cutters were investigated by scanning electron microscopy to analyze the wear mechanism,which indicated that YG8 showed the character of adhesive wear,YW1 showed character of oxidative wear and YBC251 showed character of fatigue wear.Coating of 2 3Al O and TiN could effectively reduce the abrasion of the YBC251 blade and improve the service life of it.In this paper,composite plate of 304 stainless steel fiber and 191 unsaturated polyester resin were prepared by vacuum pressure-less infiltration method and mechanical properties of the composites were tested.The results indicated that when the volume fraction of stainless steel was relatively low,the tensile strength was sensitive to the change of fiber volume fraction,and the tensile strength increased with the raise of fiber volume fraction.However,when the volume fraction was in high position,the effect of increasing content on tensile strength was limited.The compressive stress-strain curves of composite plates possessed the characteristics of typical elastic and plastic phases,and got obvious lower yield limit.Yield stress rised with SSF volume content increasing and there was an upper limit.The impact toughness of composite plate went up with the increasing of SSF volume content.The maximum bending load of composite plate was positively correlated with the volume fraction of SSF,and the higher the fiber content was,the faster the damage was.Failure modes of the composites were analyzed through scanning electron microscope and it showed that the mainly fracture ways of interface were debonding and delamination and SSF presented a variety of fracture forms.The porous bodies were used for infiltration.The mathematical model of the two-phase flow field interface in the porous body was established by Volume of Fluid(VOF).Besides,a mathematical model for the flow field in porous body was developed.The ANSYS simulation showed that the maximum velocity in the flow field was located in the grooves formed by the intersection of longitudinal and transverse fiber bundles.Fluid velocity distribution was relatively concentrated while the pressure was relatively uniform.Permeability number predicted was 5.62e-92 m.Explored the pore size distribution of porous media by experiment based on permeability and it showed that the porous media with the same porosity had different pore distribution,but the average pore size and the relative size distribution were similar.The diameter size of the fiber affects the permeability of the porous body,and the smaller the diameter was,the worse the permeability was.ANSYS software was used to realize the composition of fiber skeleton with resin and numerical simulation of the compressive deformation process of composite plate.The simulation results indicated that the bottom of the compressive sample expansion the most fast to form the drum structure.The larger volume content of the fiber made the smaller deformation of the specimen.And the skeleton structure was more stable and compact,which led to stronger bearing capacity alone after the solidified resin body had lost its carrying capacity.So,the sample got smaller deformation and damage.