Kayayyakin tace yumbun kumfa samfuran yumbu ne tare da tsarin kumfa mai kauri wanda aka yi ta tsari na musamman. Suna da fa'idodi da yawa kamar su barga sinadarai Properties, babban ƙarfi, high zafin jiki juriya, mai kyau thermal girgiza juriya, da kuma babban musamman surface area. Ana amfani da su sosai. A cikin aikin ƙarfe, simintin gyare-gyare, kare muhalli da sauran fannoni.

Siffofin:

1. Rage ƙima da ƙima na simintin gyaran kafa da rage lahani

2, yana da tasirin tacewa sosai

3. Inganta ƙarfin injina na simintin gyare-gyare

4. Sauƙaƙe tsarin gating kuma inganta ƙimar amfani da samfuri

5. Yana da babban ƙarfe na kwararan ƙarfe, kuma ƙimar kwararar ta tabbata

6. Ƙarfin aiki mafi girma a babban zafin jiki, juriya na zafi mai zafi da juriya mai tasiri na ƙarfe

7. Rage lokacin yin inji da lalacewar kayan aiki

8. Yana da daidaitattun girman girma.

Aikace-aikace:

1. Sanya a cikin kofin zuba ko kasan sprue

2. Ana sanya shi a kwance a kan mai gudu, ta yadda za a iya cika narkakkar karfen da kyau, don guje wa tasiri kai tsaye a kan tacewa ko sanya shi a tsaye a kan mai gudu. Yawan kwararar ƙarfe na narkakkar yana da sauri kuma yana da ikon cikawa mai kyau.

3. Ya kamata a ƙayyade girman tacewa bisa ga dalilai kamar ƙirar ƙira da smelting da halayen tacewa kanta.

4. Ya kamata a sarrafa kan simintin gyare-gyare kamar yadda zai yiwu don rage tasirin narkakken ƙarfe akan tacewa

5. Kada a yi amfani da tacewa fiye da zafin jiki

6. A guji amfani da tacewa don sarrafa saurin simintin

Zaɓi girman tacewa da girman raga:

1. Yi la'akari da tsabtar narkakkar karfe da yawan zafin jiki

2. Yi la'akari da kai mai zubar da ƙarfe kuma ƙididdige yankin kula da kwarara don saduwa da buƙatun lokacin zubowa

3. Yi ƙoƙarin amfani da tsarin buɗewa don guje wa kama iska

4. Lissafi kuma zaɓi wurin tacewa bisa ga iyawar tacewa da zub da buƙatun lokaci. Ƙarfin tacewa na silicon carbide foam yumbu takardar (Kg/cm2): baƙin ƙarfe launin toka: 4.0 Baƙin ƙarfe: 2.0 Alloy simintin ƙarfe: 1.0-2.0

5. Ƙarfin launin toka na gaba ɗaya yana amfani da 20ppi, baƙin ƙarfe na ductile yana amfani da 10ppi. Hakanan za'a iya zaɓar 15 ko 25ppi, kuma zaɓin raga yana da alaƙa da abubuwa da yawa a cikin ainihin zuƙowa.