Research on surface modification of Q345R copper-containing stainless steel coating by electron beam melting and cladding
For study the improvement of the surface properties of Q345R steel,copper-containing stainless steel coatings were prepared by electron beam melting and cladding technology.The surface microstructure,mechanical properties and electrochemical properties of copper-containing stainless steel coatings were investigated.The results showed that after E-beam surface cladding treatment,the coating grains were refined,the dislocation density was increased,and the plasticity and toughness were improved.Due to grain refinement and dislocation strengthening,the hardness of the coatings under the three types of beam flow was enhanced.The coating hardness reaches its maximum at 384.078 HV at a beam current of 28 mA,which was two times higher compared to the substrate at 131.048 HV.The abrasion resistance of the coating was superior to that of the substrate.At a beam current of 28 mA,the wear volume and wear rate were minimized to 10％of the wear volume of the substrate.In electrochemical corrosion measurements,the coating showed better corrosion resistance than the substrate,and the specimen at a beam current of 28 mA showed the best corrosion resistance.E-beam surface-melting of copper-containing stainless steel coatings can effectively improve the properties of Q345R carbon steel.
electron beam surface fusion claddingwear resistanceelectrochemical propertiesmicrostructure
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