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英國進口MWA工模具鈷基焊條MAC HICA E3075|ECoCr-E|Stellite司太立21號|30-50HRC|鋼鐵行業|熱作工模具修復

?This electrode is also known as alloy 21. The flux is a rutile type made on a fully alloyed core wire. Cobalt based electrode designed on a fully alloyed core wire to combat all four elements of wear, i.e. heat, impact, corrosion and abrasion. Most suitable of cobalt range where toughness is the most predominant of the four elements of wear. Excellent for rebuilding corners with minimum base metal dilution. Has ability to overlay extensive areas without cracking. Designed specifically for use as a forging die material. Because of its low carbon content, the electrode has excellent resistance to thermal and mechanical shock. The electrode deposits a high alloyed cobalt base weld metal with 0.3% carbon. Welds are machinable. The suggested usages are in iron and steel industries or any industry where heat, corrosion and abrasion occur concurrently, for such items as steel mill rolls, valves seat inlays, hot working dies and tools, hot shearing blades, tongs etc.

The electrode main advantages are: - High temperature strength and ductile, resists thermal shock. Tough-impact resistant. Highly ductile-resists weld cracking (without any preheat). High resistance to corrosion, oxidation, sulphidation. Hardness 30 HRC as deposited, increases to 50 HRC with work hardening. High resistance to cavitation-erosion.

E3075焊條又被稱為21號合金焊條，全合金焊芯金紅石型焊劑鈷基焊條。用于對抗所有四種磨損因素，即熱、沖擊、腐蝕和磨損。非常適用于四種磨損元素中韌性最為主要的鈷系列合金。極其適合用最小的母材稀釋度重建拐角。能堆焊廣泛的區域而不開裂。專門設計用作鍛模材料。由于碳含量低，該焊條具有理想的抗熱沖擊和抗機械沖擊性能。焊條可熔敷含0.3%碳的高合金鈷基焊縫金屬。焊縫可加工。推薦用于鋼鐵工業或同時發生熱、腐蝕和磨損的任何行業，例如鋼廠軋輥、閥座嵌件、熱作模具和工具、熱剪切刀片、夾具等。

Typical All Weld Metal Chemical Analysis (%)

典型全焊縫金屬成分(%)

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E3075焊條的主要優點是：

1. ü?高溫下強度高、韌性好，抗熱沖擊性強；
2. ü?抗沖擊性強；
3. ü?高韌性-焊縫抗開裂（不需要任何預熱）；
4. ü?高耐腐蝕性、氧化性、硫化性；
5. ü?熔敷層硬度為30HRC，隨加工硬化而提高至50HRC；
6. ü?高抗氣蝕性。

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Typical All Weld Deposit Hardness

典型全焊縫熔敷金屬硬度：

As Deposited熔敷狀態??????30 HRC

Work Hardened加工硬化后?50 HRC

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Sizes Available and Recommended Amperages

尺寸Φ/電流：

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Current電流：AC/DC?(+)?(min 70 OCV).

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Related Specification參考標準：AWS A5.13 ECoCr-E. Cobalt G21

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Storage儲存：Electrodes should be stored in dry conditions. Should the electrodes ?become damp, re-dry for one hour at 150°C?before use. 焊條應儲存在干燥環境中。如果焊條受潮，應在150°C下重新干燥1小時后再使用。??

局部修復優勢：

1. ü 快速維修。
2. ü 經濟性好。
3. ü 很少或無需加工。
4. ü 節省新模具的成本。
5. ü 焊接材料性能可能遠超過母材。
6. ü 耗材選擇廣泛。