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冷沖壓模具焊接的硬度不足的處理

發布日期:2022-10-09 點擊率:45

沖壓模具焊接的硬度不足現象:

原因:(一)

焊接時電流過大,對模具母材的稀釋率過大,模具母材的合金元素受損。

對策:

盡量使用小電流、短弧焊接,焊接時焊條的擺動的幅度不大于焊條直徑的1.5倍。

原因:(二)

焊接時的預熱溫度和層間溫度沒有控制。

對策:

注重把握預熱的溫度,(預熱溫度主要和母材的含碳量有關)以及焊接時層間溫度的控制。

原因:(三)

堆焊層數過多,焊接材料的選用不當。

對策:

選擇適合堆焊層數要求的焊接材料。(有的焊接材料組織體直接是高硬度的馬氏體組織,有的焊接材料是堆焊三層以上的時候才可以從奧氏體組織轉變為高硬度的馬氏體組織的。

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