Ta yaya tsarin sarrafa maɓuɓɓugan ruwan ƙarfe na ƙarfe na SAE 1070-1090 ke rage haɗarin haɓakar iskar hydrogen idan aka kwatanta da kashe mai na gargajiya?

Gargajiya mai quenching da tempering na high-carbon karfe haifar da martensitic microstructure wanda shi ne sosai mai saukin kamuwa da hydrogen embrittlement, musamman a lokacin electroplating. Austempering ya ƙunshi canjin isothermal zuwa bainite. Sakamakon ƙananan tsarin bainite yana ba da ingantaccen haɗin gwiwa na ductility da tauri a matakan tauri mai girma (HRC 45-50). Saboda bainite baya kula da matsa lamba hydrogen na tsaka-tsaki wanda ke haifar da 'jinkirin karaya,' maɓuɓɓugan ruwan raƙuman ruwa suna nuna ƙarancin gazawa sosai a cikin aikace-aikacen da aka gabatar da hydrogen yayin tsaftace acid ko tsarin sanyawa zinc. Koyaya, gasa bayan-plating (misali, 190 ° C na awanni 4-24) ya kasance wajibi.