The role of austenite in impact-abrasion process was studied on the basis of the impact-abrasion test results of a newly developed austenite-bainitic ferrite dual-phase abrasion-resistant steel with high strength,high...The role of austenite in impact-abrasion process was studied on the basis of the impact-abrasion test results of a newly developed austenite-bainitic ferrite dual-phase abrasion-resistant steel with high strength,high toughness and high strain-hardening ability. It is found that the morphology,distribution and mechanical stability,rather than the volume fraction,of austenite govern the impact abrasion behaviour.Only the appropriate amount of fine and evenly dispersed austenite with adequate mechanical stability in high strength matrices,contribute effectively to the irnpact-abrasion resistance of the materials.While large quantity of coarse austenite with poor mechanical stability,especially when it acted as a continuous matrix of the material,is extremely detrimental to impact-abrasion resistance.展开更多
In this paper, comprehensive property crack resistance, work hardening and abrasion resistance of a series of double phases austenitic alloys(FAW) has been studied by means of SEM, TEM and type MD 10 impacting wear ...In this paper, comprehensive property crack resistance, work hardening and abrasion resistance of a series of double phases austenitic alloys(FAW) has been studied by means of SEM, TEM and type MD 10 impacting wear test machine. FAW alloys are of middle chromium and low manganese, including Fe Cr Mo C alloy,Fe Cr Mn C alloy and Fe Cr Mn Ni C alloy, that are designed for working in condition of impacting abrasion resistance hardfacing.Study results show that the work hardening mechanism of FAW alloys are mainly deformation high dislocation density and dynamic carbide aging, the form of wearing is plastic chisel cutting. Adjusting the amount of carbon, nickel, manganese and other elements in austenitic phase area, the FAW alloy could fit different engineering conditions of high impacting, high temperature and so on.展开更多
Medium manganese austenitic steel (MMAS) fabricated through the hot rolling process has been used in the mining,military,and mechanical industries.In this paper,the abrasion performance and hardening mechanism were me...Medium manganese austenitic steel (MMAS) fabricated through the hot rolling process has been used in the mining,military,and mechanical industries.In this paper,the abrasion performance and hardening mechanism were measured under a series of impact energies.The impact wear was tested at different impact energies from 0.5 J to 6 J using a dynamic load abrasive wear tester (MLD-10).Microstructure and surface morphologies were analyzed using scanning electron microscopy,X-Ray diffraction,and transmission electron microscopy.The results suggest that MMSA has the best wear resistance at 3.5 J and the worst wear resistance at 1.5 J.Furthermore,the wear mechanism and worn surface microstructure change with different impact energies.There are small differences between a large amount of martensite on the worn surfaces under different impact energies and the shapes of dislocation and twins change with different impact energies.展开更多
文摘The role of austenite in impact-abrasion process was studied on the basis of the impact-abrasion test results of a newly developed austenite-bainitic ferrite dual-phase abrasion-resistant steel with high strength,high toughness and high strain-hardening ability. It is found that the morphology,distribution and mechanical stability,rather than the volume fraction,of austenite govern the impact abrasion behaviour.Only the appropriate amount of fine and evenly dispersed austenite with adequate mechanical stability in high strength matrices,contribute effectively to the irnpact-abrasion resistance of the materials.While large quantity of coarse austenite with poor mechanical stability,especially when it acted as a continuous matrix of the material,is extremely detrimental to impact-abrasion resistance.
文摘In this paper, comprehensive property crack resistance, work hardening and abrasion resistance of a series of double phases austenitic alloys(FAW) has been studied by means of SEM, TEM and type MD 10 impacting wear test machine. FAW alloys are of middle chromium and low manganese, including Fe Cr Mo C alloy,Fe Cr Mn C alloy and Fe Cr Mn Ni C alloy, that are designed for working in condition of impacting abrasion resistance hardfacing.Study results show that the work hardening mechanism of FAW alloys are mainly deformation high dislocation density and dynamic carbide aging, the form of wearing is plastic chisel cutting. Adjusting the amount of carbon, nickel, manganese and other elements in austenitic phase area, the FAW alloy could fit different engineering conditions of high impacting, high temperature and so on.
文摘Medium manganese austenitic steel (MMAS) fabricated through the hot rolling process has been used in the mining,military,and mechanical industries.In this paper,the abrasion performance and hardening mechanism were measured under a series of impact energies.The impact wear was tested at different impact energies from 0.5 J to 6 J using a dynamic load abrasive wear tester (MLD-10).Microstructure and surface morphologies were analyzed using scanning electron microscopy,X-Ray diffraction,and transmission electron microscopy.The results suggest that MMSA has the best wear resistance at 3.5 J and the worst wear resistance at 1.5 J.Furthermore,the wear mechanism and worn surface microstructure change with different impact energies.There are small differences between a large amount of martensite on the worn surfaces under different impact energies and the shapes of dislocation and twins change with different impact energies.
