Research and application of local laser cladding wear-resistant coating on mould
The outlet working condition of the injection molding die is harsh.It is very easy to be worn,damaging the outlet shape and size of the flow channel.It has a great impact on the product quality and production efficiency.Therefore,it is urgent to strengthen the outlet of the flow channel.Based on this,the laser cladding technology is used to locally strengthen the outlet of the injection molding die.The composition of the reinforced coating is designed.The cladding appearance and defect is controlled.The microstructure and mechanical property is analyzed.The process control of the actual workpiece processing is studied.Compared with the commercial wear-resistant coating materials,the hardness of the coating materials increased from 400HV to above 900HV.The wear-resistant performance of the coating increased 43 times compared with the matrix.The friction coefficient decreased from 0.635 to 0.412.The wear-resistant performance of the die is greatly improved.The inner grain of the reinforced coating is fine.Its strength and abrasion resistance are mainly guaranteed by martensite and in-situ ceramic carbide.A small amount of austenite is left to guarantee its toughness.Through special path planning and process control,it has been successfully applied in local strengthening of injection molding dies.The service life of the strengthened dies has been increased by more than 3 times.
injection mouldlaser claddingmicrostructurefriction and wear property
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