真空烧结法制备多孔金属结合剂金刚石砂轮

南京航空航天大学硕士学位论文真空烧结法制备多孔金属结合剂金刚石砂轮姓名：冯晓杰申请学位级别：硕士专业：机械制造及其自动化指导教师：苏宏华20080101i1Ni-CrWC23Ni-Cr4iiABSTRACTPorousMetal-BondedDiamondWheel(PMBDW)isanewmetal-bondeddiamondwheel.Becauseofmanyporesinthebond,comparedwiththetraditionalmetal-bondeddiamondwheel,PMBDWhasseveraladvantages,followingas:easytobedressedandtrued,lowgrindingtemperatureandforce,goodtolerancecapacity.Howeveritisdiscoveredthatthediamondretentionislowandtheabrasiveiseasytopulloutbecauseoftheporosity.ThenewPMBDWisputforwardtoimprovethebondstrengthbetweenthemetalbondanddiamondbyvacuumsinteringmethod,anditcanbeusedinbroadergrindingfields.Inthispaper,themainresearchesareasfollows:1.ThePMBDWisfabricatedbasedonthefigurationpowdersinteringmethodwiththerawmaterialsofNi-Crfiller,WCpowder,poreproduceranddiamond.Thebondinginterfacebetweenbondanddiamondoccurredchemicalmetallurgybonding.2.Theeffectsofthedifferentproportionofrawmaterial,sintertemperatureandtimeontheporerateandbendstrengtharestudiedsystematically.3.ThefracturesurfaceofsegmentandthebondinginterfacebetweenbondanddiamondareinvestigatedbySEMtoexplorethepore’ssize,shape,distributionandthesubstanceinthebondinginterface.4.ThroughAl2O3ceramicsgrindingexperimentwiththePMBDW,thesurfaceroughnessunderdifferentgrindingparametersismeasured,andtheabrasiontopographyofthewheelisobserved.Keywords:Porositymaterials,diamondtool,Metal-bondedwheel,Porerate,bendstrengthv2.172.2102.3122.4162.5162.6Ni-Cr172.7WC182.8192.9202.10202.11212.12212.13VOQ2-80212.14222.15222.16232.17232.18243.1273.2283.3283.4283.5293.6303.7SANS303.8313.9323.1032vi3.11333.12343.13363.14373.15373.16383.17384.1404.2414.3414.4434.5454.6464.7474.8484.9484.1049vii2.1Ni-Cr172.2WC172.3212.4214.1Al2O3434.2Al2O3434.343()11.1:,[1]ELID[2~3]21.21.2.1RitsumeikanUniversityT.Tanaka1992[4]PMBDW(PorousMetal-BondedDiamondWheel)H.TominoS.H.Troung[5](1)(2)(3)(4)1.2.2PMBDW1[6~7]PMBDW5Pa1030Mpa200/min4002550/min6008003min53.9%88.6%2[8]3PMBDW1%610MPa600800,1000200MPa1PMBDWH.Onishi35%53%3[9~10]Ni-Cu-Sn(Ni-Cu)PMBDWNi-Cu-Sn(Ni-Cu)133.3Pa750100090010002060minPMBDW10min50020min4009800KPa6hPMBDWT.S.Hoanh(1-1)(1-1)tgVbVpVgrPMBDW35%58%1.2.3PMBDWH.TominoPMBDW(25%−+=1)(3/1pbggVVVrt4170/200)(0.080.65MPa18.3m/s)(1470MPa1700)25%25%[11]H.Onishi(0.12MPa22.7m/s)PMBDW(25%170/200)(588MPa)SD1200FPMBDW12MPaPMBDW2PMBDW[12]T.S.HoanhNi-Cu-SnPMBDW(25.328.5%)VKC4525m/s120mm/minPl0PMBDW58%Pl0Pl0lmµ[13][14~16]1.2.4PMBDW[2]1PMBDW5PMBDWPMBDWPMBDW23121.2.5Ni-Cr[17~18]Ni-Cr[19~22]1.3:61WCNi-Cr212Ni-CrNi-Cr3Al2O3Al2O37[23][23]82.11()()2[24]1)2)3)4)5)6)7)9[25]LaPlace3[23]2.2123102.22.1.21[26]321112[25]3[27]CO21)2)3)4[27]PbSnZnCd122.1.3[28]132.31909202030[29][28]1%2%10%15%98%2.3[29][30]140%60%90%[27]2[29][31]14[32]1234562.22.2.1[33]151[34]GB/T6405-94RVDMBDSCDSMDDMDM-SDRVDMBDM-SD[35]MBD2100/120100/120170/20040/50230/270408080140140270[26]80/100316[19~21]Ni-CrNi-CrNi-CrCr2.4[19]2.5[35]Cr7C3Ni-Cr285MPa[36][36]Ni-Cr2.12.6Ni-Cr2.4172.52.1Ni-Crg/cm3(Hv)1507.64562.6Ni-CrWC[17~18]WCWC2.22.7Ni-CrWC2.2WCg/cm3WC2315.5182.7WC4GB/T6409.1-19940.88100%0.2225%25%40%5CaCO3CaCO31915040[38]30402.2.2[32]1[31]Cr12MoV8508703050/h75023h5006006008408601502006263HRC22.8(a)(b)2.82.2.312.9(a)(b)202.91)WC:Ni-Cr3:12:11:11:205%10%15%40%60%2.102.102)32.11[26]350500MPa2.124)Ni-Cr[26]10502.132.32101−×Pa212.46002.112.122.3VOQ2-80(mm)450300300(kg)60(KW)80()1650(±)5(Pa)6.710-3(Pa/h)0.65222.13VOQ2-802.412345105015min105030min105045min106515min108015min2WC:Ni-Cr1:22.14(a)1050,30min4/51/5[23]50%WC:Ni-Cr3:12:12.14(b)WC:Ni-Cr3:1,1050,30min2.151050,30min10%WC:Ni-Cr2:12.142.15(a)(b)232.32.15[39](1)(2)(3)(4)2.162.17ab2.162.17(b)(a)242.18ab2.182.4123(b)(a)25Ni-Cr3.13.1.11[40]1)2)ρ(3-1)(3-1)1ρ(3/cmg)3211mmm−×=ρρ261m(g)2m(g)3m(g)20ρ[40]%%22110WtWt×+×=ρρρ(3-2)21,ρρ21,WtWt1%%21=+WtWt3[40]ζ(3-3)3.1.21[41]3.1WCNi-Cr120%65%2WCNi-Cr40[36]3WCNi-CrNi-CrNi-CrWC%100)1(0×−=ρρζ27Ni-Cr4WCNi-Cr1:21:12:12:13:1WC3.123.2-202468101214162025303540455055606570%WC:Ni-Cr=2:1WC:Ni-Cr=1:1WC:Ni-Cr=1;2-20246810121416152025303540455055606570WC:Ni-Cr=2:1WC:Ni-Cr=1:1WC:Ni-Cr=1:2%%-202468101214162025303540455055606570%%WC:Ni-Cr=3:1WC:Ni-Cr=2:1WC:Ni-Cr=1:1-2024681012141625303540455055606570%%WC:Ni-Cr=3:1WC:Ni-Cr=2:1WC:Ni-Cr=1:1a105015minb105030minc105045mind106515min-202468101214162025303540455055606570%%WC:Ni-Cr=3:1WC:Ni-Cr=2:1WC:Ni-Cr=1:1e108015min28153.31050WC:Ni-Cr2:13.23.3WCNi-Cr3WC:Ni-Cr2:180/1001050303.43.410152025303540455030323436384042444648505254565860626466%0%5%10%15%10451050105510601065107010751080108530323436384042444648505254565860626466%0%5%10%)15%-505101520303540455055606570040602912WCNi-CrWC310%3.23.2.1[42]3.53.6SANS3.73.5303.63.7SANS3-4σ(Pa)F(N)L(m)223bhFL=σ31b(m)h(m)3.2.213.8WCNi-Cr3.8-20246810121416100200300400500600MPaWCNi-Cr=2:1WCNi-Cr=1:1WCNi-Cr=1:2-20246810121416100150200250300350400450500550600650700MPaWCNi-Cr=2:1WCNi-Cr=1:1WCNi-Cr=1:2-2024681012141650100150200250300350400450500550MPaWCNiCr31WCNiCr21WCNiCr11-2024681012141650100150200250300350400450500550MPaWC:Ni-Cr=3:1WC:Ni-Cr=2:1WC:Ni-Cr=1:1-2024681012141650100150200250300350400450500550MPaWCNi