Kuthetha ukuthini ukuphawulwa kwiintloko zeBolt?

Elona bakala liqhelekileyo lebholiti elikhoyo ngoku libakala lemetric elimiselwe yi-ISO, elinamanani amabini ahlulwe ngechaphaza kwaye adla ngokuphawulwa ngaphezulu okanye kwicala lentloko yebholiti okanye i-nut. Ezona zixhaphakileyo ngu-8.8, 10.9 no-12.9.

Phindaphinda-phinda inani phambi kwedesimali nge-100 ukunika ubuncinci amandla okuqina ebholithi. Inani elisemva kwedesimali eliphindaphindwe nge-10 linika uqikelelo lwepesenti yamandla esivuno xa kuthelekiswa nowona mandla obunzima obuncinane. Umzekelo, amandla okuqina ebakala 8.8 malunga nama-800MPa, kwaye amandla esivuno amalunga nama-800*80%=640MPa. Usenokuba uzibonile iilogo ezimbini ezingezantsi.

Oku kuphawulwa kweebholiti zentsimbi okanye amandongomane, u-A2 umele304 intsimbi engenasicikunye ne-A4 imele i-316 yensimbi engenasici. Inombolo elandelayo imele amandla okuqina kwaye iya kuhluka ngokuxhomekeke kumandla obunzima bebholithi. Umzekelo, i-70 ithetha ukuba amandla okuqina alingana ne-700MPa yentsimbi engapheliyo. Zombini iintsimbi ezingenastainless zinokumelana ne-corrosion, i-316 ingcono kune-304, kwaye ifanelekile kwiindawo ezineemfuno eziphezulu.

Usenokuba unemibuzo, kutheni kungekho manqaku kwiintloko zebholiti? Oko ngokuqhelekileyo kuthetha ukuba umgangatho wokusebenza webholithi uphantsi, njengenqanaba le-4.8 okanye inqanaba 5.8, elidla ngokungamakishwa.

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