M'nthawi yayitali yapitayi, timagwiritsa ntchito matebulo osinthira akunja kupita ku matebulo aku China, koma panthawi yogwiritsa ntchito, chifukwa cha kapangidwe ka mankhwala a zinthuzo, ukadaulo wopangira, kukula kwa chitsanzo ndi zinthu zina komanso kulondola kwa zida zoyezera m'maiko osiyanasiyana, ubale wosinthira kuuma ndi mphamvu kuti tikhazikitse maziko ndi njira zogwiritsira ntchito deta ndizosiyana, tapeza kuti pali kusiyana kwakukulu pakati pa mitengo yosiyanasiyana yosinthira. Kuphatikiza apo, palibe muyezo wogwirizana, mayiko osiyanasiyana amagwiritsa ntchito tebulo losinthira losiyana, zomwe zimabweretsa chisokonezo mu mitengo yosinthira kuuma ndi mphamvu.
Kuyambira mu 1965, China Metrology Scientific Research ndi mayunitsi ena akhazikitsa zizindikiro za kuuma kwa Brinell, Rockwell, Vickers ndi Rockwell zapamwamba komanso mphamvu pogwiritsa ntchito mayeso ambiri ndi kafukufuku wofufuza, kuti afufuze ubale wogwirizana pakati pa kuuma kosiyanasiyana ndi mphamvu ya zitsulo zachitsulo, kudzera mu kutsimikizira kupanga. Adapanga "tebulo lathu losinthira kuuma kwachitsulo chakuda ndi mphamvu" loyenera mndandanda wa zitsulo 9 mosasamala kanthu za mtundu wachitsulo. Pa ntchito yotsimikizira, mayunitsi opitilira 100 adatenga nawo gawo, zitsanzo zopitilira 3,000 zidakonzedwa, ndipo deta yopitilira 30,000 idayesedwa.
Deta yotsimikizira imagawidwa mofanana mbali zonse ziwiri za njira yosinthira, ndipo zotsatira zake zimagwirizana ndi kugawa kwabwinobwino, ndiko kuti, matebulo osinthira awa akugwirizana ndi zenizeni komanso zomwe zilipo.
Matebulo osinthira awa ayerekezeredwa padziko lonse lapansi ndi matebulo ofanana osinthira a mayiko 10, ndipo mitengo yosinthira ya dziko lathu ndi pafupifupi avareji ya mitengo yosinthira ya mayiko osiyanasiyana.
Nthawi yotumizira: Marichi-26-2024
