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永大不鏽鋼嚴格依照中國GB、美國ASTM、日本JIS、德國DIN、歐盟EN等規範,並且從國內外引進檢測設備,嚴格品質管理

  • 不鏽鋼是否有磁性?

    2018-10-11

    一般而言,不鏽鋼以奧氏體而言,是不具備磁性的。但是馬氏體及鐵素體會具有磁性,不過奧氏體也是可能具有磁性的。原因有以下兩點:凝固時,因為部分冶煉的原因會殘留部分磁性,304為例會殘留3-8%屬於正常現象,所以奧氏體應屬於無磁性或弱磁性。奧氏體型不鏽鋼無磁性,但其冷加工硬化後,γ相會有部分生成馬氏體相變時將會產生磁性,可用熱處理方法來消除這種馬氏體組織而恢複其無磁性。

  • 不鏽鋼的定義

    2018-10-11

    不鏽鋼,簡單來說:不鏽鋼並非不會生鏽的鋼鐵,而是不易生鏽的鋼鐵。在1910年時,發現在普碳鋼中加入12%的鉻Cr,具有抗腐蝕性及抗氧化的特性。所以在一般定義中,含12%的鉻Cr才能稱之為不鏽鋼。根據國標GB20878-2007不鏽鋼和耐熱鋼牌號及化學成分的明確定義:不鏽鋼,以不鏽、耐蝕性為特性,鉻Cr含量至少為10.5%,且碳含量最大不得超過1.2%。但是根據最近國標GB20878-2007不鏽鋼

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