Yadda za a zabi kayan aikin dumama billet?

Tsarin birgima na ƙarfe na al’ada shi ne, ana tattara billet ɗin ƙarfe a sanyaya, a kai shi zuwa injin na’ura, sannan a dumama a cikin tanderun dumama don jujjuya su zuwa karfe.

Wannan tsari yana da lahani guda biyu.

1. Bayan da billet da aka zana daga steelmaking ci gaba da simintin, zafin jiki a kan kwantar da hankula gado ne 700-900 ℃, kuma latent zafi na billet ba a yi amfani da yadda ya kamata.

2. Bayan billet yana mai zafi da tanderun dumama, asarar saman billet saboda iskar oxygen shine kusan 1.5%.

Canjin canjin makamashi da ceton ƙarfe na bita na mirgina ƙarfe yana buƙatar amfani da dumama shigar da ƙara don haɓaka zafin kan layi da dumama iri ɗaya na ci gaba da yin simintin simintin gyaran kafa.