Yadda za a zabi kayan samar da kusoshi

Abubuwan kayan aikin injiniya na kusoshi suna shafar albarkatun ƙasa da magani mai zafi. Gabaɗaya, albarkatun albarkatun kasa suna da tasiri mafi girma a kan kaddarorin kusoshi saboda kaddarorin kayan albarkatun kasa sun ƙayyade iyakar iyakar maganin zafi.. Misali, albarkatun kasa ba tare da Cr ba ba zai taɓa samun ƙarfin juriya na a 10.9 kullin daraja.

Gabaɗaya, lokacin da abokan ciniki ba su da takamaiman buƙatu, muna ba da shawarar kayyade albarkatun albarkatun don samar da kusoshi dangane da yanayin amfani da abokin ciniki. Misali, a cikin masana'antar gine-gine, ana bada shawarar yin amfani da kusoshi na daraja 8.8 ko mafi girma don tsarin karfe, kuma a cikin masana'antar kera motoci, kusoshi na daraja 10.9 ko mafi girma ana ba da shawarar don haɗi.

Lokacin da abokan ciniki ke da takamaiman buƙatu don ƙimar kusoshi, mu yawanci zabar kusoshi bisa ga ka'idar ISO898 don awo bolts.

Abubuwan da ke biyo baya sune buƙatun buƙatun buƙatun a cikin ISO898:

Dukiya aji	Kayan abu kuma zafi magani	Chemical abun da ke ciki iyaka					Haushi zafin jiki
		(jefa bincike, %)a
		C		P	S	B^b	°C
		min.	max.	max.	max.	max.	min.
4.6^{c d}	Carbon karfe ko carbon karfe tare da additives		0,55	0,050	0,060	Ba a kayyade ba	—-
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	Carbon karfe tare da additives (misali. Boron ko Mn ko Cr) quenched da fushi	0,15e	0,40	0,025	0,025	0,003	425
	ko
	Carbon karfe quenched da fushi
	ko	0,25	0,55	0,025	0,025
	Alloy karfe quenched da fushi	0,20	0,55	0,025	0,025
9.8^f	Carbon karfe tare da additives (misali. Boron ko Mn ko Cr) quenched da fushi	0,15e	0,40	0,025	0,025	0,003	425
	ko
	Carbon karfe quenched da fushi
	ko	0,25	0,55	0,025	0,025
	Alloy karfe quenched da fushi	0,20	0,55	0,025	0,025
10.9^f	Carbon karfe tare da additives (misali. Boron ko Mn ko Cr) quenched da fushi	0,20e	0,55	0,025	0,025	0,003	425
	ko
	Carbon karfe quenched da fushi
	ko	0,25	0,55	0,025	0,025
	Alloy karfe quenched da fushi	0,20	0,55	0,025	0,025
12.9^{f h} ⁱ	Alloy karfe quenched da fushi	0,30	0,50	0,025	0,025	0,003	425
12.9^{f h i}	Carbon karfe tare da additives (misali. Boron ko Mn ko Cr ko Molybdenum) quenched da fushi	0,28	0,50	0,025	0,025	0,003	380
a Idan aka samu sabani, nazarin samfurin ya shafi.
b Abubuwan Boron na iya kaiwa 0,005 %, idan dai ana sarrafa boron mara amfani ta hanyar ƙara titanium da/ko aluminum.
c Ga sanyi jabu fasteners na dukiya azuzuwan 4.6 kuma 5.6, maganin zafi na waya da ake amfani da shi don ƙirƙira sanyi ko na jabun sanyi
fastener kanta na iya zama dole don cimma ductility da ake buƙata.
d An ba da izinin yankan ƙarfe kyauta don waɗannan azuzuwan dukiya tare da mafi girman sulfur mai zuwa, sinadarin phosphorus da gubar:S: 0,34 %; P: 0,11 %; Pb: 0,35 %.
e A hali na fili carbon boron karfe tare da carbon abun ciki a kasa 0,25 % (nazarin simintin gyare-gyare), mafi ƙarancin abun ciki na manganese zai kasance 0,6 % domin ajin dukiya 8.8 kuma 0,7 % domin azuzuwan dukiya 9.8 kuma 10.9.
f Don kayan waɗannan azuzuwan dukiya, dole ne a sami isasshen ƙarfi mai ƙarfi don tabbatar da tsarin da ya ƙunshi
kusan 90 % martensite a cikin ginshiƙi na sassan da aka yi da zaren don masu ɗaure a cikin yanayin "as-taurare" kafin tempering. g Wannan karfen gami zai ƙunshi aƙalla ɗaya daga cikin abubuwan da ke gaba a cikin mafi ƙarancin adadin da aka bayar: chromium 0,30 %, nickel 0,30 %, molybdenum 0,20 %, vanadium 0,10 %. Inda aka kayyade abubuwa a hade biyu, uku ko hudu kuma suna da abun ciki na gami kasa da wadanda aka bayar a sama, iyakar ƙimar da za a yi amfani da ita don ƙaddara aji na karfe shine 70 % na jimlar ƙimar iyaka ɗaya da aka ƙayyade a sama don biyun, abubuwa uku ko hudu da suka shafi.
h Fasteners ƙera daga phosphated albarkatun kasa za a dephosphated kafin zafi magani; rashin farin farin da aka wadatar da sinadarin phosphorus za a gano shi ta hanyar gwajin da ta dace.
Ana ba da shawarar yin taka tsantsan lokacin amfani da ajin kadara 12.9/12.9 ana la'akari. Iyawar da fastener masana'anta, ya kamata a yi la'akari da yanayin sabis da hanyoyin murɗawa. Muhalli na iya haifar da fashewar lallacewa na kayan ɗamara kamar yadda ake sarrafa su da kuma waɗanda aka rufe.

Idan kuna da wata tambaya game da samar da bolts, pls ji a tuntube mu.

Sherry Cen

JMET CORP., Jiangsu Sainty International Group

Adireshi: Ginin D, 21, Software Avenue, Jiangsu, China

Tel. 0086-25-52876434

WhatsApp:+86 17768118580

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