6a51铝合金热挤压和热处理工艺的研究

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1、Ё೒ߚ㉏ো˖TG166.3ᄺ᷵ҷⷕ˖10213U.D.C.:621.785ᆚ㑻˖݀ᓔ⸩຿ᄺԡ䆎᭛˄Ꮉ⿟⸩຿˅6A51䪱ড়䞥⛁᣸य़Ϣ⛁໘⧚Ꮉ㡎ⷨお⸩຿ⷨお⫳˖ᄭ᱃ᵫᇐᏜ˖ਈᯚᬭᥜ⬇䇋ᄺԡ˖Ꮉ⿟⸩຿ᄺ⾥˖ᴤ᭭Ꮉ⿟᠔೼ऩԡ˖ϰ࣫䕏ড়䞥᳝䰤䋷ӏ݀ৌㄨ䕽᮹ᳳ˖2008ᑈ12᳜ᥜќᄺԡऩԡ˖જᇨⒼᎹϮ໻ᄺClassifiedIndex˖TG166.3Schoolcode˖10213U.D.C.:621.785Secret-level˖disclosureDissertationfortheMasterDegree˄Mas

2、terofEngineering˅STUDYONHOTEXTRUSIONANDHEATTREATMENTOFALUMINUMALLOY6A51Candidate˖SunJinglinSupervisor˖Prof.WuKunAcademicDegreeAppliedfor˖MasterofEngineeringSpecialty˖MaterialEngineeringAffiliation:NortheastLightAlloyCo.,LtdDateofDefence˖December,2008Degree-

3、Conferring-Institution˖HarbinInstituteofTechnologyજᇨⒼᎹϮ໻ᄺᎹ⿟⸩຿ᄺԡ䆎᭛ᨬ㽕ᴀ᭛ҹ6A51䪱ড়䞥៤ߚ㣗ೈЎ෎⸔ˈᣝЏ㽕ড়䞥ܗ㋴MgǃSiǃSnϡৠ៤ߚ䆒䅵ˈ䫌៤䫌䬁ˈ⛁ࡴᎹৢ䗮䖛࡯ᄺᗻ㛑⌟䆩੠ᰒᖂ㒘㒛㒧ᵘߚᵤˈⷨおњഛࣔ࣪⏽ᑺ੠ᯊ䯈ǃ೎⒊⛁໘⧚੠ᯊᬜㄝ⛁໘⧚Ꮉ㡎ࠊᑺᇍড়䞥㒘㒛੠ᗻ㛑ⱘᕅડˈҹঞড়䞥ЁⱘЏ㽕ܗ㋴MgǃSiǃSnㄝᇍড়䞥㒘㒛੠ᗻ㛑ⱘᕅડDŽⷨお㒧ᵰ㸼ᯢ˖˄1˅ഛࣔ࣪⏽ᑺᇍഛࣔ࣪ᬜᵰⱘᕅડ㽕↨ഛࣔ࣪⏽ᯊ䯈ⱘᕅડ᳈Ўᰒ㨫ˈϨ⏽ᯊ䯈އᅮѢഛࣔ࣪⏽ᑺ

4、DŽᔧഛࣔ࣪⏽ᑺЎ590ćᯊˈᵱ᱊㔥Ꮖᰒ㨫ޣᇥˈ࣪ড়⠽Ꮖܙߚ⒊㾷ˈ᳝ⱘ࣪ড়⠽Ꮖਜ⧗࣪㘮䲚ˈԚ᮴䖛⚻⡍ᕕDŽ㗠೼595ćⱘᰒᖂ㒘㒛Ёߎ⦄њ໡❨݅᱊⧗ˈ໡❨᱊⬠੠໡❨ϝ㾦ᔶⱘϝ໻⡍ᕕˈ㸼ᯢ೼䆹⏽ᑺϟᏆ䖛⚻DŽ˄2˅催⏽ϟড়䞥Ёⱘᔎ࣪Ⳍ೼¿೎⒊ԧЁⱘ⒊㾷ᑺ䱣ⴔ೎⒊໘⧚⏽ᑺⱘᦤ催㗠๲໻ˈ⒊㾷ⱘᛜ໮ᔎ࣪ᬜᵰᛜདDŽԚབᵰ⏽ᑺ໾催ˈӮՓড়䞥ЁԢ❨⚍݅᱊ԧ❨࣪ѻ⫳䖛⚻DŽ಴ℸˈ೎⒊໘⧚⏽ᑺⳈ᥹ᕅડⴔড়䞥ⱘᯊᬜᬜᵰDŽ530ćᯊᔎ࣪Ⳍܙߚ೎⒊ˈজϡՓড়䞥㒘㒛㉫໻ˈҎᎹᯊᬜৢ⹀ᑺؐ䖒ࠄ2101kg/mmᎺেDŽ˄3˅155ć/16hᯊᬜᯊˈ

5、ᵤߎⳌҹGPऎЎЏˈᵤߎⳌⱘሎᇌ䕗ᇣˈ໘Ѣ⃴ᯊᬜ⢊ᗕˈᔎᑺ⬹Ԣ˗㗠೼170ć/16hᯊᬜᯊˈᵤߎⳌҹ¡ĄЎЏˈᵤߎⳌⱘሎᇌ䕗໻䕗໮ˈℸᯊ᥹䖥ዄؐᯊᬜ⢊ᗕˈড়䞥ⱘᔎᑺ䕗催DŽ6A51䪱ড়䞥೼155̚175ćᯊᬜˈ⹀ᑺؐ⒵䎇ᣛᷛ㽕∖DŽ˄4˅SnϢぎԡⱘ㒧ড়㛑䕗໻DŽ6A51䪱ড়䞥ЁⱘSnܗ㋴㛑฿ܙぎԡˈ䰡Ԣ⒊䋼ॳᄤⱘᠽᬷ㛑࡯ˈ䰏ℶњGPऎⱘᔶ៤ˈҹᡥࠊ≝⎔ⳌMg2Siⱘ㘮䲚ǃ䭓໻ˈҢ㗠ᓊ㓧㞾✊ᯊᬜ䖛⿟ˈ๲ࡴњ⏀☿ৢⱘᄩ㚆ᳳˈ೼䕗䭓ᯊ䯈ݙ⹀ᑺϡछ催ˈ㗠ลᗻϡ䰡Ԣˈ᳝߽ѢᎹӊⱘދ᣸៤ൟˈᑊ೼ҎᎹᯊᬜৢ⹀ᑺজ໻ᐙഄ๲ࡴDŽড়

6、䞥ЁSn৿䞣䍞໮ᄩ㚆ᳳ䍞䭓DŽ݇䬂䆡˖6A51䪱ড়䞥˗⛁໘⧚Ꮉ㡎˗ഛࣔ࣪˗࡯ᄺᗻ㛑˗ᰒᖂ㒘㒛I哈尔滨工业大学工程硕士学位论文AbstractThevariouscompositionsofaluminumalloy6A51wasdesignedbasedonmainalloyingelementMg,SiandSn,themechanicalpropertiesweretestedandmicrostructurewasanalyzedaftercastingandheatingprocess,theinflu

7、enceofhomogenizationtemperatureandtime,solutionheattreatmentandagingonmicrostructureandpropertiesofalloywerestudied,andtheinfluenceofprincipalalloyingelementMg,Si,Snonmicrostructureandpropertiesofalloywasalsostudied.Theresultsshowthat:(1)Theinfluenceofhomog

8、enizationtemperatureonhomogenizationresultismoreprominentthanthatofholdingtime,alsoholdingtimerestswithhomogenizationtemperature.Thedendriticcrystalstructuredecreasesevidentlywhenhomogenizationtemperat