Iintlobo zeiinqwaba zeshiti zentsimbi
Ngoku ka "Inqwaba yeShiti yeNsimbi eSongiweyo eshushu” (GB∕T 20933-2014), inqwaba yesinyithi esigoqiweyo esishushu ibandakanya iintlobo ezintathu, iintlobo ezithile kunye namagama azo ekhowudi zezi zilandelayo:Inqwaba yeshiti yentsimbi yohlobo lwe-U, igama lekhowudi: Inqwaba yeshiti yentsimbi yohlobo lwePUZ, igama lekhowudi: Inqwaba yeshiti yentsimbi ethe tye yePZ, igama lekhowudi: PI Qaphela: apho u-P engonobumba wokuqala wenqwaba yeshiti yentsimbi ngesiNgesi (iPile), kwaye u-U, u-Z, kunye no-I bamele imilo yenqwaba yeshiti yentsimbi.

 

Umzekelo, inqwaba yentsimbi yohlobo lwe-U esetyenziswa kakhulu, i-PU-400X170X15.5, inokuqondwa njengobubanzi obuyi-400mm, ukuphakama okuyi-170mm, ubukhulu obuyi-15.5mm.

 

  

inqwaba yeshidi lentsimbi yohlobo lwe-z

Inqwaba yeshiti yentsimbi yohlobo lwe-U

 

Kutheni ingelohlobo lwe-Z okanye uhlobo oluthe tye kodwa ingelohlobo lwe-U olusetyenziswa kakhulu kubunjineli? Enyanisweni, iimpawu zoomatshini zohlobo lwe-U kunye nohlobo lwe-Z ziyafana ngokukodwa kwinto enye, kodwa inzuzo yenqwaba yesinyithi se-U ibonakala kwisenzo esidibeneyo seenqwaba zesinyithi ze-U ezininzi.

 

Ukusuka kumfanekiso ongasentla, kunokubonwa ukuba ukuqina kokugoba ngemitha nganye yomgca wenqwaba yesinyithi yohlobo lwe-U kukhulu kakhulu kunokwenqwaba yesinyithi yohlobo lwe-U (indawo ye-axis engathathi hlangothi itshintsha kakhulu) emva kokuba inqwaba yesinyithi yohlobo lwe-U ilunywe kunye.
2. Izinto zentsimbi ezifumba inqwaba
Udidi lwentsimbi i-Q345 lurhoxisiwe! Ngokwe-"Low Alloy High Strength Structural Steel" GB/T 1591-2018 esemgangathweni omtsha, ukusukela nge-1 kaFebruwari 2019, udidi lwentsimbi i-Q345 lurhoxisiwe lwaza lwatshintshwa lwaba yi-Q355, ehambelana nodidi lwentsimbi i-S355 esemgangathweni ye-EU. I-Q355 yintsimbi eqhelekileyo enamandla aphantsi e-alloy enamandla aphezulu ene-355MPa.