Ka dib markii la dumiyo, caadi ahaan, deminta, xanaaqa kuleylka kuleylka iyo dusha sare ee wax laga beddelo, ee dhalul-marinta ayaa laga yaabaa inuu soo saaro dhalanrog daweynta kuleylka.

Sababta asalka u ah dhalanrog waa culeyska gudaha ee caloosha ee la diidayo inta lagu jiro daaweynta kuleylka, taasi waa murugada gudaha ee daweyntii ee daweyn ka dib udhaxeysa kala duwanaanshaha heerkulka ee heerkulka iyo dibadda iyo farqiga u dhexeeya isbadalka qaabdhismeedka.

Markii walaaca uu ka sarreeyo meesha ugu dhasha birta daqiiqad gaar ah inta lagu guda jiro daaweynta kuleylka, waxay sababi doontaa dhalanro ka dhalatay.

Welwelka gudaha ee la soo saaray geedi socodka daaweynta kuleylka waxaa ku jira walaaca kuleylka iyo walwalka isbedelka wejiga.

1. Cadaadiska kuleylka
Markii uu dhaleeceyntii la kululeeyo oo la qaboojiyo, waxaa weheliya ifafaale ee ballaarinta kuleylka iyo foosha qabow. Marka dusha sare iyo xudunta caloosha la kululeeyo ama lagu qaboojiyo xawaareyo kala duwan, taasoo dhalisay kala duwanaanshaha heerkulka, ballaarinta ama foosha mugga ayaa sidoo kale ka duwan kan dusha sare iyo xudunta. Culayska gudaha ee ay sababaan isbeddelada mugga kala duwan ee ay ka dhigaan farqiga u dhexeeya heerkulka waxaa loo yaqaannaa walaaca kuleylka.
Inta lagu gudajiro daaweynta kuleylka, culeyska kuleylka ee caloosha ayaa inta badan loo muujiyaa sidii: markii uu dhaleeceyntu kululaado, heerkulka dusha sare ayaa kor u kacaya oo la ballaarinayaa, heerkulka saqafka ah ayaa hoos u dhacaya , waqtigan culeyska cadaadiska dusha sare iyo culeyska xiisadda ee xudunta.
Digtoonka ka dib, heerkulka aasaasiga ah ayaa kor u kacaya oo la casuumay. Halkaa marka ay dhacdo, caloosha ayaa muujisay ballaarinta mugga.
Qaboojinta dusha sare ee shaqada, dusha sare ee qaboojinta ka dhakhso badan xudunta, heerkulka sare, heerkulka sare ee wadnaha si looga hortago jahwareerka, wadnaha ayaa soo saarta heerkulka cadaadiska ah, marka la qaboojiyo heerkul gaar ah, dusha sare ee qandaraasku, dusha sare ee qandaraasku. Iyo in qaboojinta ujira si ay u dhacaan wadooyinka sii socda awgeed, dusha sare ayaa ah walwal culeys ah, halka wadnaha walaaca khafiifka ah, walwalka dhamaadka qaboojinta uu wali ku jiro cirka haraaga ah.

2. Wejiga isbedelka wajiga

Geedi socodka daaweynta kuleylka, cufnaanta iyo mugga dembiga waa in ay isbedelaan maxaa yeelay cufnaanta iyo mugga dhismayaasha kaladuwan ayaa ka duwan.
Sababta oo ah farqiga heerkulka ah ee u dhexeeya dusha sare iyo xudunta caleenta, isbadalka unugyada ee u dhexeeya dusha sare iyo xudunta ayaa la soo saari doonaa markii ay isbedelka gudaha iyo dibedda ah iyo isbedelka mugga ah ay ka duwan yihiin.
Cudurka noocan oo kale ah ee ay sababaan farqiga u dhexeeya isbedelka unugyada waxaa loo yaqaanaa walaaca wejiga.

Cabbirka ballaaran ee qaabdhismeedka aasaasiga ah ee birta ah ayaa lagu kordhiyaa sirka loo yaqaan 'aulnitic', pearlite, toleniaicic, trostite, hypobainte, martensite-ka iyo bilowga.
Tusaale ahaan, markii uu dhaleeceynayo oo si dhakhso ah loo qaboojiyo, lakabka dusha sare ayaa laga beddelay Austente ilaa maktabadda iyo mugga, laakiin wadnuhu wali wuxuu ku jiraa Gobolka Austente, oo ka hortagaya ballaarinta lakabka dusha sare. Natiijo ahaan, wadnaha caloosha ka dhalatay culeys maroojin, halka lakabka dusha sare lagu qaado culeys isku buuqsan.
Markay sii socoto qabow, heerkulka dusha sare ma sii daayo, laakiin mugga wadnaha ayaa sii wata inay bararto sida ay u beddelato dusha, sidaa darteed wadnaha ayaa loo dulsaaraa, sidaa darteed wadnaha ayaa loo geystaa walwal cadaadis ah, iyo dusha sare waxaa lagu dhejiyaa walaaca khasabka ah.
Ka dib qaboojiyaha ka dib, walaacani wuxuu ku jiri doonaa gudaha oo uu noqon doono walaaca haraaga ah.

Sidaa darteed, inta lagu gudajiro nidaamka dabacsan iyo qaboojinta, walbahaarka kuleylka iyo walwalka isbedelka wejiga ayaa ka soo horjeedda, oo labada carrabka ku jira ee ku hadhayna waa iska soo horjeedda.
Isku-darka culeyska fekerka kuleylka iyo walwalka isbedelka wajiga waxaa lagu magacaabaa ka daadashada walaaca gudaha.
Marka walwalka gudaha ee gudaha ee caloosha ee cafiska ah ay ka sarreeyaan meesha ugu dhasha birta, ayaa shaqadu soo saari doonaa cilad balaastig ah, taasoo dhali doonta dhalanrog.

(Laga soo bilaabo: 168 doku doqon