Nto hardness thiab uniformity ntawmncej forgingsyog cov khoom tseem ceeb ntawm kev xav tau thiab kev tshuaj xyuas niaj hnub. Lub hardness ntawm lub cev qhia tau hais tias hnav tsis kam, thiab lwm yam, nyob rau hauv ntau lawm, lub resilience ntug dej D hardness nqi HSd yog siv los qhia.
Lub hardness yuav tsum tau ntawm ncej forgings yog tsuas yog raws li nyob rau hauv hardness theem ntawm cov neeg ua hauj lwm cov menyuam los yog nruab nrab cov menyuam nyob rau hauv kev sib cuag nrog nws, thiab ob yuav tsum tau kom muaj kev sib raug zoo. Raws li kev tshawb fawb txog kev tiv thaiv kev qaug zog, qhov nyuaj ntawm cov menyuam txhawb nqa yuav tsum yog 10-25 HS units qis dua qhov kev sib cuag, uas yog qhov zoo los txhim kho qhov tshwm sim qaug zog hauv qhov chaw sib cuag. Nyuajncej forgingsmuaj qhov hnav tsis kam thiab ua rau muaj qhov tshwm sim "tev tawm", uas yog, cov txheej txheem ntiav ntawm cov yob nto ua cov yas deformation thiab tom qab ntawd ua rau me me nto tev; Thaum hardness siab dhau lawm, lub caij nyoog ntawm brittle spalling nce. Raws li cov pob txha toughness tus nqi ntawm hardened txheej yog tsawg, thaum lub tawg tshwm, nws yuav kis tau sai heev, ua rau loj bulk spalling. High hardness kuj tuaj yeem ua rau kev sib cuag qaug zog thiab hnav ceev ceevncej forgingsthiab shorten lub sij hawm sib tsoo ntawmncej forgings.

Nyob rau hauv xyoo tas los no, hardness ntawmncej forgingsntawm txias thiab kub dov zeb feem ntau tau txhim kho, tshwj xeeb tshaj yog kev ua hauj lwm yob ntawm kub dov zeb tau tsim thiab txhawb successively, lub hardness theem ntawm centrifugal composite siab chromium cam khwb cia hlau yob, centrifugal composite siab chromium steel rolls thiab siab alloy unrestricted txias cam khwb cia. hlau yob. Qib hardness ntawmncej forgingstau mus txog 70-83. Tam sim no ncej forgings cov ntaub ntawv thiab cov cuab yeej tsim khoom tuaj yeem ua tau raws li qhov nyuaj ntawm 55-75 loj zoo ncej forgings. Nyob rau tib lub sijhawm, kev siv lub siab hardness ncej forging txij nkawm thev naus laus zis kuj tau txais ntau yam kev paub.
Tus superloj ncej forgingsntawm lub phaj zeb yog qhov loj ntawm qhov loj thiab hnyav hauv qhov hnyav, thiab dov ceev yog me dua li ntawm cov sawb zeb. Yog li ntawd, hnav tsis kam thiab hardness yuav tsum tau qis dua.