Karfe zafi magani injin tandu sau da yawa amfani da gwaji kayan aiki a magance dutse masu daraja, baturi, aiki carbon, silicate, zinariya, karfe da sauran masana'antu. Musamman a masana'antar sarrafa dutse masu daraja suna amfani da yawa, saboda haka alamun fasaha na ƙarfe mai zafi na injin injin suna da tsananin buƙatu. A ƙasa za a gabatar da ku yadda aka ƙona dutse masu daraja a cikin ƙarfe zafi sarrafawa injin tandu.

Da farko, da karfe zafi magani injin tanda sealability ne mafi tsauri, kamar a cikin ƙonewa dutse mai daraja tsari, domin ya zama da launi na dutse mai daraja sosai haske, don kammala sintering a karkashin oxygen-free yanayi, da tsari rikitarwa, na biyu shi ne a cikin ƙonewa tsari, don maimaita pumping injin, saboda a cikin ƙonewa kayan zai samar da sauran gas, amma kuma dole ne a sami gas kariya, yawanci zai iya wucewa nitrogen, hydrogen, argon da sauran kare gas. Gaskiya na dutse mai daraja yana ɗaukar lokaci mai tsawo, saboda don ci gaba da matsin lamba da keɓaɓɓen zafi, gabaɗaya keɓaɓɓen zafi kwanaki biyu, don haka don samar da mafi kyawun launi, to, dole ne a sanye da kayan aikin injin zafi mai zafi mai zafi mai zafi. Bayan launi da gaskiya high zafin jiki magani, za a iya yi grinding gyara! Saboda haka an haifi wani kyakkyawan dutse mai daraja!