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甘孜鑄鋼件低倍組織測試

信息編號:63909610 發布時間:2025/8/6 10:06:11
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為了獲得質量良好的鑄鋼件,應根據鑄鋼的鋼種、質量、壁厚及結構復雜程度等因素來確定適宜的澆注溫度和澆注速度,并在操作中進行控制。
鑄鋼件澆注溫度的選擇
澆注溫度對鑄鋼件質量有較大的影響。澆注溫度過高時,鋼液的收縮量增大,氣體含量增大,鋼液對鑄型的熱作用增強,使鑄鋼件易產生縮孔、氣孔、變形、裂紋和粘砂等缺陷。當澆注溫度過低時,鋼液的流動性差,易使鑄鋼件產生冷隔、澆不到、夾渣等缺陷。
鑄鋼件澆注溫度一般較其材質的熔點高40—80℃。鋼種粘度大、鑄鋼件質量小、壁薄、結構復雜的鑄鋼件,其澆注溫度應更高些;反之,則澆注溫度相應降低。
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