Research On Microstructure And Properties Of Arc Cladding Light Multicomponent Alloy Cladding

Lightweight multi-component alloy is a new type of lightweight alloy with unique crystal structure and mechanical properties,which has great development potential in the field of aerospace.At present,the preparation of light multi-principal component alloys is mainly based on vacuum arc smelting.However,the process of arc smelting is complex and the cost is high,so complex parts cannot be prepared,which limits its engineering application.Twisted wire is a new type of wire,which consists of 6 peripheral wire twisted around the center.It has the effect of rotating arc in arc cladding and can guarantee the uniformity and excellent performance of components,which provides a new opportunity and technical support for the preparation and application of lightweight multi-principal component alloys.To further broaden the light application of principal component alloy,this paper puts forward the design method of the preparation of the stranded wire ternary stranded wire,using the traditional arc cladding process on 5052 aluminum alloy TC4 titanium alloy substrate and substrate were prepared respectively light more principal alloy cladding layer and cladding process parameters on light more principal alloy cladding layer of formability and the influence law of the organizational structure,studied the light more principal alloy cladding layer's hardness,compression performance and friction and wear behavior.The main research results are as follows:(1)Cladding process parameters were optimized by orthogonal test for ternary AlTiCu light multi-principal component alloy.When the current is 200A,the preheating temperature is 200?,and the cladding velocity is 5m/min,the Ti alloy substrate cladding layer has a low dilution rate and the best formability,and its structure is AlCu2Ti phase with BCC structure and a small amount of CuO phase and Fe2Ti3O9 phase.When the current is 200A,the preheating temperature is 200?,and the cladding speed is 4m/min,the cladding layer of Al alloy substrate has a low dilution rate and has the best formability.Its structure is AlCu2Ti phase with BCC structure and a small amount of Ti elemental.(2)To study the light more principal cladding layer physical properties and mechanical properties,the results show that at room temperature,deposition layer in the 4.35-4.91 g/cm3 density,compression strength Ti alloy cladding layer and the average hardness value at room temperature,respectively,1187 MPa and 340.8 HV,A1 alloy cladding layer compression strength and the average hardness value at room temperature,respectively,1296 MPa and 257.4 HV,alloy deposition layer density and specific strength are close to the Ti alloy.(3)The friction and wear behavior of light multicomponent alloy cladding layer under dry friction condition is studied.The results show that,under the same experimental parameters,the wear resistance of 45 steel cladding layer is higher than that of Al matrix cladding layer and lower than that of Ti matrix cladding layer.The main wear failure mechanisms of Ti matrix cladding are oxidation wear and adhesive wear,and particle wear is also increased in A1 matrix.The failure mechanism of 45 steel is adhesive wear,abrasive wear and oxidation wear.Figure[52]table[21]reference[87]...