一种热锻模具堆焊用药芯焊丝及其制备方法与应用

By using flux-cored welding wire and gas-free shielded welding process, a high-temperature performance hot forging die overlay layer is formed, which solves the wear resistance and fatigue resistance problems of die materials under high temperature and high pressure in the existing technology, and achieves efficient and stable die repair effect.

CN122400901APending Publication Date: 2026-07-17GUILIN UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUILIN UNIVERSITY OF TECHNOLOGY
Filing Date
2026-06-18
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing hot forging die surfacing materials are difficult to obtain deposited metal with both high red hardness and high toughness under high temperature and high pressure. Furthermore, the welding efficiency is low, the process stability is poor, and the hardness and wear resistance of the surfacing layer decrease significantly during high-temperature service, resulting in insufficient thermal fatigue resistance.

Method used

Flux-cored welding wire containing high-carbon ferrochrome, low-carbon ferromanganese, and ferrotitanium is used. Through a gas-free shielded welding process, the welding current is 350A~420A, the voltage is 32V~36V, the speed is 0.4m/min~0.6m/min, and the interpass temperature is 270℃~350℃. A multi-element alloy deposited layer is formed. The high-entropy rare earth element LaCePrSmEr is used to purify the molten pool and form a complex and stable pinning structure, which improves the high-temperature performance.

Benefits of technology

It significantly improves the high-temperature wear resistance and thermal fatigue resistance of hot forging dies, extends the die life, reduces repair costs, has high welding efficiency, high welding material utilization, clean and slag-free surface, and stable arc, and is suitable for repairing dies made of various materials.

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Abstract

本发明涉及材料加工工程中的焊接领域，具体涉及一种热锻模具堆焊用药芯焊丝及其制备方法与应用。所述药芯焊丝包括钢制的外皮和填充在所述钢制的外皮内的药芯；所述药芯包括如下以质量百分数计的原料：高碳铬铁15%~25%、低碳锰铁5%~10%、钛铁8%~12%、铝粉1%~5%、钼铁8%~15%、铌铁0.5%~4%、钒铁0.1%~3%、钨铁1%~3%、金红石3%~5%、石英粉1%~3%、碳酸钙2%~4%、LaCePrSmEr高熵稀土0.5%~1.0%、余量为还原铁粉。本发明的药芯焊丝对热锻模具进行堆焊修复后，硬度可达HRC 53~57，堆焊层致密，合金元素分布均匀，性能优异。
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