Ti对复杂锰黄铜TL-084组织及性能的影响OA

Different Ti contents are introduced into the original TL-084 manganese brass production process,and the microstructure of the matrix and hard phases in the alloyare analyzed by using metallographic analysis,XRD,SEM,and other characterization methods.The study focus on the influence of different Ti contents on the morphology,size,and distribution of the hard phases in alloy.Furthermore,the effects of Ti content on the mechanical properties of the alloy are investigated through hardness,tensile strength,and wear resistance tests.It is found that the matrix of TL-084 brass alloy is the β phase,with coarse primary phase[Mn(Fe)]5Si3,fine eutectic phase Mn5Si3,and small granular lead-rich phase uniformly distributed in the matrix.After the introduction of Ti elements,a Ti-rich phase and a three-layer core-shell structure centered on the Ti-rich phase are formed in the matrix.The refinement process affects the primary phases in the matrix but results in the coarsening of the matrix grains.When the Ti content increases to 0.3%,the Ti-rich phase in the matrix starts to agglomerate.In terms of mechanical properties,the hardness exhibits an increasing trend with increasing Ti content,follows by a decrease.When the Ti addition amount is 0.2%,its Vickers hardness is HV287.2,with an increase of 8.5% .The tensile strength also shows an initial increase and then a decrease with the increase in Ti content.The brass rod with wTi=0.1% added has the highest tensile strength,which is about 744.5 MPa,with an increase of 6.75% .