Indlela yokukhetha izinto eziphathekayo zokuvelisa iibholiti

Iimpawu zemishini yeebholithi zichaphazeleka kwizinto eziluhlaza kunye nonyango lokushisa. Ngokubanzi, izinto ezikrwada zinempembelelo enkulu kwiipropathi zeebholiti kuba iipropathi zezinto eziluhlaza zimisela umda ophezulu wonyango lobushushu.. Umzekelo, imathiriyeli ekrwada ngaphandle kwe-Cr ayinakuze ifikelele amandla okuqina a 10.9 ibholithi yebakala.

Ngokubanzi, xa abathengi bengenazo iimfuno ezithile, sincoma ukumisela izinto eziluhlaza zokuveliswa kwebholithi ngokusekelwe kwimeko yokusetyenziswa komthengi. Umzekelo, kushishino lokwakha, kucetyiswa ukuba kusetyenziswe iibholiti zebakala 8.8 okanye ngaphezulu kwizakhiwo zentsimbi, nakwishishini leemoto, iibholiti zebakala 10.9 okanye ngaphezulu kuyacetyiswa kuqhagamshelo.

Xa abathengi baneemfuno ezithile zebakala lebholithi, ngokuqhelekileyo sikhetha iibholithi ngokwemigangatho ye-ISO898 yeebholiti zemetriki.

Oku kulandelayo ziimfuno zemathiriyeli ekrwada yebholithi kwi-ISO898:

Ipropati iklasi	Izinto eziphathekayo kwaye ubushushu unyango	Ikhemikhali ukwakheka umda					Ukufudumeza ubushushu
		(phosa uhlalutyo, %)a
		C		P	S	B^b	°C
		imiz.	max.	max.	max.	max.	imiz.
4.6^cd	Intsimbi yekhabhoni okanye intsimbi yekhabhoni enezongezo		0,55	0,050	0,060	Ayichazwanga ngqo	—-
4.8^d		-
5.6^c		0,13	0,55	0,050	0,060
5.8^d		-	0,55	0,050	0,060
6.8^d		0,15	0,55	0,050	0,060
8.8^f	Intsimbi yekhabhoni enezongezo (umz. Boron okanye uMn okanye Cr) epholile kwaye enomsindo	0,15e	0,40	0,025	0,025	0,003	425
	okanye
	Intsimbi yekhabhoni yacinywa kwaye inomsindo
	okanye	0,25	0,55	0,025	0,025
	Intsimbi ye-alloy yacinywa kwaye inomsindo	0,20	0,55	0,025	0,025
9.8^f	Intsimbi yekhabhoni enezongezo (umz. Boron okanye uMn okanye Cr) epholile kwaye enomsindo	0,15e	0,40	0,025	0,025	0,003	425
	okanye
	Intsimbi yekhabhoni yacinywa kwaye inomsindo
	okanye	0,25	0,55	0,025	0,025
	Intsimbi ye-alloy yacinywa kwaye inomsindo	0,20	0,55	0,025	0,025
10.9^f	Intsimbi yekhabhoni enezongezo (umz. Boron okanye uMn okanye Cr) epholile kwaye enomsindo	0,20e	0,55	0,025	0,025	0,003	425
	okanye
	Intsimbi yekhabhoni yacinywa kwaye inomsindo
	okanye	0,25	0,55	0,025	0,025
	Intsimbi ye-alloy yacinywa kwaye inomsindo	0,20	0,55	0,025	0,025
12.9^{f h} ⁱ	Intsimbi ye-alloy yacinywa kwaye inomsindo	0,30	0,50	0,025	0,025	0,003	425
12.9^{f h i}	Intsimbi yekhabhoni enezongezo (umz. Boron okanye Mn okanye Cr okanye Molybdenum) epholile kwaye enomsindo	0,28	0,50	0,025	0,025	0,003	380
a Kwimeko yempikiswano, uhlalutyo lwemveliso lusebenza.
b Umxholo weBoron unokufikelela 0,005 %, ukuba iboron engasebenziyo ilawulwa ngokongezwa kwe-titanium kunye/okanye i-aluminiyam.
c Kwiziqhoboshi ezibandayo zomgquba kwiiklasi zepropathi 4.6 kwaye 5.6, unyango lobushushu bocingo olusetyenziselwa ukubunjwa okubandayo okanye kwengqele eyenziweyo
i-fastener ngokwayo inokuba yimfuneko ukuphumeza i-ductility efunekayo.
d Intsimbi yokusika yamahhala ivunyelwe kwezi klasi zepropathi kunye ne-sulfure ephezulu elandelayo, phosphorus kunye nomxholo okhokelayo:S: 0,34 %; P: 0,11 %; Pb: 0,35 %.
e Kwimeko yentsimbi ye-carbon boron ecacileyo kunye nomxholo wekhabhoni ongezantsi 0,25 % (uhlalutyo lokuphosa), ubuncinci bomxholo wemanganese uya kuba 0,6 % kwiklasi yepropathi 8.8 kwaye 0,7 % kwiiklasi zepropathi 9.8 kwaye 10.9.
f Ngezixhobo zezi klasi zepropathi, kuya kubakho ukuqina okwaneleyo ukuqinisekisa ukuba isakhiwo esiqulathe
malunga 90 % i-martensite kumbindi wamacandelo anemisonto kwizibophelelo kwimeko "njengoko-lukhuni" ngaphambi kokufudumala. g Le ntsimbi yealloyi iya kuqulatha ubuncinane enye yezi zinto zilandelayo kubungakanani obuncinci obunikiweyo: ichromium 0,30 %, nickel 0,30 %, molybdenum 0,20 %, vanadium 0,10 %. Apho iziqalelo zichazwe ngokudityaniswa kwezimbini, ezintathu okanye ezine kwaye zineziqulatho zengxubevange ezingaphantsi kwezo zinikwe ngasentla, ixabiso lomda eliza kusetyenziswa ukumiselwa kweklasi yentsimbi 70 % yesambuku somda wamaxabiso achazwe ngasentla kwezi zimbini, izinto ezintathu okanye ezine ezichaphazelekayo.
h Izibophelelo ezenziwe ngemathiriyeli ekrwada ye-phosphated ziya kukhutshwa i-dephosphate phambi konyango lobushushu; ukungabikho kwe-phosphorus emhlophe etyetyisiweyo umaleko kuya kubonwa ngendlela efanelekileyo yovavanyo.
i Isilumkiso siyacetyiswa xa kusetyenziswa udidi lwepropathi 12.9/12.9 iyaqwalaselwa. Ukubanakho kwe isiqhoboshi umenzi, iimeko zenkonzo kunye neendlela zokukrazula kufuneka ziqwalaselwe. Ubume bendawo bunokubangela uxinzelelo ukuqhekeka kwe-corrosion of fasteners njengoko kusetyenzwa kunye nezo zigqunyiwe.

Ukuba unomnye umbuzo malunga nokuveliswa kweebholithi, pls uzive uqhagamshelane nathi.

USherry Cen

JMET CORP., Iqela leJiangsu Sainty International

Idilesi: Isakhiwo D, 21, Software Avenue, Jiangsu, eTshayina

Umnxeba. 0086-25-52876434

WhatsApp:+86 17768118580

I-imeyile [email protected]