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雙金屬NM400耐磨鋼管的工藝技術有哪些

更新時間:2020-03-24 18:35點擊次數:
NM400耐磨鋼管采用先進的消失模真空吸鑄復合工藝或自動離心澆鑄復合工藝制備,外層為普通鋼管(20#)、內層為高耐磨合金(KMTBCr28),在高溫熱鑄狀態下整體復合而成,耐磨性與韌性有機結合,性能優勢互補,具有優良的抗沖刷磨損性能以及承壓抗沖擊能力,整體使用性能大幅提高??芍谱鞒筛鞣N規格的彎頭、直管、三通以及其它異型管道,適用于各種磨損嚴重的干態、濕態物料輸送,可廣泛應用于電力、礦山、冶金、煤炭、建材等工礦企業。
            
      (1)消失模真空吸鑄復合工藝
        采用聚苯乙烯塑料泡沫制作成內襯模型并裝入雙金屬耐磨管內,經涂料、烘干、造型,在抽真空狀態下高溫澆注高合金耐磨材料;塑料泡沫受高溫作用分解氣化消失并被合金液原位取代,冷卻凝固后形成外層為耐磨鋼管、內層為高耐磨合金的雙金屬耐磨管。
       
      (2)自動離心澆鑄復合工藝
       將雙金屬耐磨管固定于特制的管模內,在高速旋轉狀態下,利用扇形包和長流槽等流量澆注原理,通過控制澆注速度和澆注溫度,將高耐磨合金液澆入雙金屬耐磨管內,使其在離心力作用下,均勻分布到雙金屬耐磨管內壁,最后冷卻凝固形成一體。
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