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山東鋁合金壓鑄失效的原因都有哪些?

來源:http://www.bghkca.buzz     發布時間:2020-04-06 15:17:50    點擊:

1.模具熱疲勞裂紋失效的壓鑄生產中,模具反復受到熱成形面及其內部變形的冷卻作用,相互之間反復出現循環熱應力,導致結構損傷和回彈損失,導致微裂紋的出現,并繼續擴展,一旦裂紋擴展,流體底辟和熔融金屬,反復的機械應力加速裂紋的擴展。因此,一方面,在壓鑄開始時,模具必須充分預熱。此外,在壓鑄生產過程中,模具必須保持在一定的工作溫度范圍內,以避免早期開裂失效。同時,要保證模具在生產制造前不發生內因。由于實際生產中,模具失效主要是熱疲勞開裂失效。
  1. In the die casting production of die-casting with thermal fatigue crack failure, the die is repeatedly cooled by the hot forming surface and its internal deformation, and the cyclic thermal stress occurs between them repeatedly, resulting in structural damage and rebound loss, resulting in the appearance of microcracks, and continuing to expand. Once the cracks expand, the repeated mechanical stress accelerates the crack expansion once the fluid diapir and molten metal. Therefore, on the one hand, at the beginning of die casting, the die must be fully preheated. In addition, in the process of die casting, the die must be kept in a certain range of working temperature to avoid early cracking failure. At the same time, it is necessary to ensure that the internal cause of the die does not occur before the production and manufacturing. In actual production, the main failure of the die is thermal fatigue cracking.
  2.斷裂故障注入力量的作用下,模具將在裂紋更薄弱的地方,特別是模具成形表面的標志或者電加工痕跡不拋光,或將成為個裂紋形狀的角落,當存在脆性相或顆粒粗,容易骨折。然而,在脆性斷裂過程中,裂紋擴展非???,這對模具的失效是非常危險的。為此,一方面,模具表面所有的劃痕、電加工痕跡都必須進行拋光,即使是在澆注系統中,也必須進行拋光。此外,所使用的模具材料要求具有高強度、良好的塑性、良好的沖擊韌性和良好的斷裂韌性。
山東鋁合金壓鑄
  2. Under the action of fracture fault injection force, the mold will be in the weakest place of the crack, especially the mark of the mold forming surface or the mark of electric machining is not polished, or it will become the corner of the first crack shape, when there is brittle phase or Particle thick, it is easy to fracture. However, in the process of brittle fracture, the crack growth is very fast, which is very dangerous to die failure. For this reason, on the one hand, all scratches and machining marks on the mold surface must be polished, even in the pouring system. In addition, the die material used should have high strength, good plasticity, good impact toughness and good fracture toughness.
  3.熔煉失效之前已經提到過,常用的壓鑄合金有鋅合金、鋁合金、鎂合金和銅合金,還有純鋁壓鑄,鋅、鋁、鎂是比較活躍的金屬元素,它們與模具材料有很好的親和力,尤其是鋁容易咬模。當模具硬度較高時,耐腐蝕性較好,如果模具表面較軟,則耐腐蝕性較差。然而,在實際生產中,模具的腐蝕只是局部的部分,直接腐蝕的部分是澆口(芯、腔),容易腐蝕,而軟件的硬度則容易附著鋁合金.
  3. It has been mentioned before smelting failure that common die-casting alloys include zinc alloy, aluminum alloy, magnesium alloy and copper alloy, and pure aluminum die-casting. Zinc, aluminum and magnesium are relatively active metal elements, which have good affinity with mold materials, especially aluminum is easy to bite. When the hardness of the mould is high, the corrosion resistance is good. If the surface of the mould is soft, the corrosion resistance is poor. However, in the actual production, the mold corrosion is only a part of the direct corrosion is the gate (core, cavity), easy to corrosion, and the hardness of the software is easy to attach aluminum alloy
  以上就是山東鋁合金壓鑄對壓鑄失效的原因的詳細介紹,想要了解更多請點擊官網http://www.bghkca.buzz
  The above is a detailed introduction to the causes of die casting failure of Shandong Aluminum alloy die casting. For more information, please click http://www.bghkca.buzz
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