端子设计教材

内容Contents端子Contact第一筋：（端子的材料）Section1:MaterialforContact端子的材料MaterialforContact成分的性能PerformanceofIngredient材料特性及延伸MaterialPropertiesandCreep第二筋：（零^）Section2:Plating耄^PlatingW^^^^ffi力PlatingandContactForce不同材^的明系和W埸腐触ConnectionofdifferentmaterialsandCorrosionbyElectricfield第三筋：（端子K^）Section3:ContactDesign布置和反作用力Displacementandreactionforce^^ffi力分析Analysisofcontactforce雁力消除和Bauschinger效雁StressreliefandBauschingerEffect第四筋：（典型冏题）Section4:TypicalProblems焊缝Soldercrack接躺腐触FrettingCorrosion毛刺WhiskerW^偏移Electromigration端子材^MaterialforContact材^和特性MaterialandCharacteristic材^Material合金Alloy特性CharacteristicBrass（Mffi）Cu-Zn^格低，易於ffi制成型，但易出璟ffi僵裂缝Lowprice,easytopressandform,butcrackbystresscorrosionPhos-Bro（磷化物）Cu-Sn-P高强度和强』性但辱W性差Highstrengthandelasticity,butlowelec.conductivity

MAX-251Cu-Ni-Si-Sn-Zn高强度和辱毫，性良好的熟蠕夔性Highstrengthandelasticity,goodperformanceforthermalcreepKLF-5Cu-Sn-Fe-P高强度和强，性辱耄性好Highstrengthandelasticity,highelec.ConductivityBe-CuCu-Be-Ni-Co-Fe强度最好，但僵格高Higheststrength,buthighpriceMF-202Cu-Sn-Ni-P保有Phos-Bro的强度，且提高了抗腐触性和可耄^性MaintainthestrengthofPhos-Bro,improvecorrosivityandsolderabilityMSP-1Cu-Mg-P保有Phos-Bro的强度，且提高了抗腐触性和可雷^性MaintainthestrengthofPhos-Bro,improvecorrosivityandsolderabilityMM600Cu-Ni-P-Zn材^性能良好但^格高Goodperformancematerial,buthighprice成分的性能PerformanceofIngredient成分Ingredient性能PerformanceZn剑易於浇鳍成型，抗耄簸偏移，在含量舄40wt%畤出现厘力破读裂缝Tobeeasytocastandform,Effectiveagainstelectro-migration,stresscrackat40wt%Sn砷提高硬度，改善了抗^触和磨损性能，^隙含量不能超遏8wt%Increasehardness,improverustandwear

resistance,actualquantity8wt%islimitP磷含量在0.05・・・0.5wt%畤具有高强度和强性Havehighstrengthandelasticityinthedomainof0.05-0.5wt%NiM高强鼠强性硬度榻氏(YOUNG’S)模数很高Havehighstrength,elasticityandhardness,Young’smodulusbecomestobehighFe^因^格低，用於代替M(NI),改善了辱置和抗高温性能UsedinsteadofNiforlowcost,improveelec.ConductivityandheatresistanceMg竦舄了浇^而加入能有效抗氧化Addedforcasting.EffectiveagainstoxidationAl铝高强度。如果以铝化^的形式加入则材^强度能和Be-Cu—檬良好Havehighstrength.IfitisaddedinconjunctionwithMg,thematerialwouldbestrongaswellasBe-CuTi^具抗高温性能HaveheatresistanceCo^具抗高温性能HaveheatresistanceSi硅提高了抗腐触性能如果和M以合金形式加入，则材^具有抗高温性能Improvecorrosivity.IfitisaddedinconjunctionwithNi,thematerialwouldhaveheatresistance耄^Plating耄溶耄^化毕耄^ChemicalPlating耄^的功能(作用)PerformanceofPlating1.防止氧化（生:、腐触)--接躺面性能好1.防止氧化（生:corrosion)-goodperformanceofcontactforce2.改善接躺面稀定性Stablizationofcontactsurface耄^和接躺面强度PlatingandcontactforceAu不惟定uncertaintySn影雷^理^值theory0-30g值actualcomputer15-80不同材^的混合和毫埸腐^Theconjunctionofdifferentmaterialsandcorrosionbyelectricfield焊缝Soldercrack调度婷化Temp.change20U-100C-200-500-200焊接榻氏模数（Young’smodulu>温度（O）榻氏模敷（kgf/mm2）屈服力（kgf/mm2）-5040010.0202504.01001601.5奔命琪估公式LifeestimationmodelManson-Coffin公式model>成少焊缝的接^哉^ConnectorDesignagainstsoldercrackA〃封於端子，低榻氏模敷和低屈服力的材^好Aboutcontact,lowYoungsmodulusandlowyieldstrengthmaterialisbetter.B〃端子畏度畏些好Aboutcontactlength,longisbetter.C〃端子尺寸（厚度和宽度），小些好Aboutcontactdimension（thicknessandwidth）,smallisbetterD〃接^畏度，短些好Aboutconnectorlength,shortisbetter接^磨损Frettingcorrosion已知事^KnownfactsA〃在所有赎金属（非贵金属）上都可能畿生接躺磨授Itispossibletooccurinallbasemetal（notpreciousmetal）B〃瞒黏凰力越大越好些ItisbetterthatcontactforceisstrongC“润滑油畲）咸小磨损ItwoulddecreasebylubricatingoilD〃富摩擦系敷舄2um畤将畿生磨摸Itisenoughtooccurthecorrosionbyamplitudeofonly2umE〃直接原因是自身在空麻中的氧化Thedirectreasonofitisoxygenitselfoftheair.降低接躺磨授的端子哉^ContactDesignagainstfrettingcorrosionA〃探用贵金魔毫^UsepreciousmetalplatingB〃探取措施，将端子固定UsethemeansthatbothcontactsarefixedC〃用润滑油Uselubricatingoil殛余雁力随畤^的燮化（琪雁力舄0.8,