Me yasa babban karfen carbon ke da wahalar walda?

Babban Carbon Karfe yana da ƙarancin weldability saboda yawan abun ciki na carbon.Siffofin walda sune kamar haka:
(1) rashin ingancin thermal conductivity, babban bambancin zafin jiki tsakanin yankin weld da ɓangaren da ba shi da zafi.Lokacin da narkakken tafkin ya yi sanyi sosai, damuwa na ciki a cikin walda zai iya haifar da fasa.
(2) ya fi kula da quenching kuma ana samun sauƙin kafa martensite a cikin yankin kusa da kabu.Saboda aikin danniya na tsarin, yankin da ke kusa da kubu yana haifar da fashewar sanyi.
(3) saboda tasirin yanayin zafi mai zafi, hatsi yana girma da sauri, carbide yana da sauƙin tarawa da girma a kan iyakar hatsi, wanda ya sa weld ya raunana kuma ƙarfin haɗin gwiwa yana raguwa.
(4) high carbon karfe ne mafi kusantar samar da zafi fasa fiye da matsakaici carbon karfe
High carbon karfe ne irin carbon karfe tare da w (c)> 0.6% .Yana da mafi girma hali don taurare da samar da high carbon martensite fiye da matsakaici carbon karfe, kuma ya fi kula da samuwar sanyi fasa.

A lokaci guda, tsarin martensite da aka kafa a cikin HAZ yana da kaddarorin masu wuya da raguwa, wanda ke haifar da raguwar filastik da ƙarfin haɗin gwiwa.Saboda haka, weldability na high carbon karfe ne wajen matalauta, da kuma musamman waldi tsari dole ne a soma, don tabbatar da yi na haši.
Saboda haka, a cikin tsarin walda, yawanci da wuya a yi amfani da su.High carbon karfe ne yafi amfani ga inji sassa na bukatar high taurin da sa juriya, kamar Rotary shafts, manyan gears da couplings.
Domin adana karfe da sauƙaƙe fasahar sarrafawa, waɗannan sassan injin galibi ana yin su da tsarin walda.A cikin kera manyan injuna, manyan sassan karfen carbon kuma za su fuskanci matsalolin walda.
A lokacin da yin waldi tsari na high carbon karfe sassa, shi wajibi ne don nazarin kowane irin yiwu waldi lahani da kuma daukar daidai waldi tsari matakan.