Tensile xeem yog los ua ib tugseamless steel yeeb nkabrau hauv cov qauv, rub tus qauv mus rau pob txha ntawm lub tshuab ntsuas tensile, thiab tom qab ntawd ntsuas ib lossis ntau lub zog, feem ntau tsuas yog lub zog tensile, yield zog, elongation tom qab tawg thiab tawg cheeb tsam. Lub shrinkage. Kev ntsuas tensile yog txoj kev sim yooj yim tshaj plaws rau cov khoom siv hlau ntawm cov khoom siv hlau. Yuav luag txhua cov ntaub ntawv hlau tau teev cov kev ntsuas tensile ntev npaum li lawv muaj qhov yuav tsum tau muaj rau cov khoom siv tshuab. Tshwj xeeb tshaj yog rau cov ntaub ntawv uas nws cov duab tsis yooj yim rau kev sim hardness, tensile xeem tau dhau los ua tib txoj kev kuaj cov khoom siv tshuab.
Qhov kev ntsuam xyuas hardness yog maj mam nias ib qho nyuaj indenter rau hauv qhov chaw ntawm cov yeeb nkab seamless nyob rau hauv cov xwm txheej tshwj xeeb, thiab tom qab ntawd sim qhov tob lossis qhov loj ntawm qhov indentation los txiav txim qhov hardness ntawm cov khoom. Kev ntsuas hardness yog qhov yooj yim tshaj plaws, ceev tshaj plaws thiab yooj yim tshaj plaws rau kev sim cov khoom siv ntawm cov khoom siv. Kev ntsuam xyuas hardness tsis yog kev puas tsuaj thiab muaj kev sib raug zoo ntawm kev sib raug zoo ntawm cov khoom siv hardness thiab tensile lub zog qhov tseem ceeb. Tus nqi hardness ntawm cov khoom tuaj yeem hloov mus rau hauv tus nqi tensile lub zog, uas yog qhov tseem ceeb tshaj plaws.
Txij li kev sim tensile tsis yooj yim thiab nws yooj yim los hloov los ntawm hardness mus rau lub zog, ntau thiab ntau tus neeg tsuas yog sim hardness ntawm cov ntaub ntawv thiab tsis tshua muaj kev sim lawv lub zog. Tshwj xeeb tshaj yog vim kev txhim kho txuas ntxiv thiab kev tsim kho tshiab ntawm hardness tester manufacturing technology, hardness ntawm qee cov ntaub ntawv uas tsis tuaj yeem kuaj ncaj qha ua ntej, xws li seamless steel kav, stainless hlau daim hlau thiab stainless hlau strips, tam sim no tuaj yeem kuaj ncaj qha rau hardness. . Yog li ntawd, muaj qhov sib txawv uas qhov kev sim hardness maj mam hloov qhov ntsuas tensile.
Cov kav hlau feem ntau siv peb qhov ntsuas qhov tawv tawv: Brinell, Rockwell, thiab Vickers los ntsuas lawv qhov tawv.
1. Brinell hardness
Ntawm cov qauv seamless steel yeeb nkab, Brinell hardness yog qhov siv dav tshaj plaws, thiab cov kab uas hla yog feem ntau siv los qhia qhov nyuaj ntawm cov khoom, uas yog ob qho tib si intuitive thiab yooj yim. Tab sis nws tsis haum rau cov kav hlau uas ua los ntawm cov tawv tawv los yog nyias nyias.
2. Rockwell hardness
Rockwell hardness test ntawm seamless steel kav yog tib yam li Brinell hardness test, ob qho tib si yog indentation test method. Qhov txawv yog tias nws ntsuas qhov tob ntawm qhov indentation. Rockwell hardness test yog ib txoj kev siv dav siv tam sim no. Ntawm lawv, HRC tsuas yog thib ob rau Brinell hardness HB hauv cov qauv steel yeeb nkab. Rockwell hardness tuaj yeem siv rau kev txiav txim siab ntawm cov khoom siv hlau los ntawm qhov muag heev mus rau qhov nyuaj heev. Nws ua rau qhov tsis txaus ntawm Brinell txoj kev. Txawm li cas los xij, vim nws qhov me me indentation, nws tus nqi hardness tsis yog raws li txoj kev Brinell.
3. Vickers hardness
Lub seamless steel yeeb nkab Vickers hardness xeem kuj yog ib qho kev xeem indentation txoj kev uas yuav siv tau los txiav txim hardness ntawm nyias nyias hlau cov ntaub ntawv thiab nto txheej. Nws muaj qhov zoo ntawm Brinell txoj kev thiab Rockwell txoj kev thiab kov yeej lawv cov kev tsis txaus ntseeg, tab sis nws tsis yooj yim li Rockwell txoj kev, thiab Vickers txoj kev tsis tshua siv nyob rau hauv steel yeeb nkab qauv.
