英国进口MWA工模具钴基焊条MAC HICA E3075|ECoCr-E|Stellite司太立21号|30-50HRC|钢铁行业|热作工模具修复

?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焊条又被称为21号合金焊条，全合金焊芯金红石型焊剂钴基焊条。用于对抗所有四种磨损因素，即热、冲击、腐蚀和磨损。非常适用于四种磨损元素中韧性最为主要的钴系列合金。极其适合用最小的母材稀释度重建拐角。能堆焊广泛的区域而不开裂。专门设计用作锻模材料。由于碳含量低，该焊条具有理想的抗热冲击和抗机械冲击性能。焊条可熔敷含0.3%碳的高合金钴基焊缝金属。焊缝可加工。推荐用于钢铁工业或同时发生热、腐蚀和磨损的任何行业，例如钢厂轧辊、阀座嵌件、热作模具和工具、热剪切刀片、夹具等。

Typical All Weld Metal Chemical Analysis (%)

典型全焊缝金属成分(%)

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E3075焊条的主要优点是：

1. ü?高温下强度高、韧性好，抗热冲击性强；
2. ü?抗冲击性强；
3. ü?高韧性-焊缝抗开裂（不需要任何预热）；
4. ü?高耐腐蚀性、氧化性、硫化性；
5. ü?熔敷层硬度为30HRC，随加工硬化而提高至50HRC；
6. ü?高抗气蚀性。

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Typical All Weld Deposit Hardness

典型全焊缝熔敷金属硬度：

As Deposited熔敷状态??????30 HRC

Work Hardened加工硬化后?50 HRC

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Sizes Available and Recommended Amperages

尺寸Φ/电流：

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Current电流：AC/DC?(+)?(min 70 OCV).

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Related Specification参考标准：AWS A5.13 ECoCr-E. Cobalt G21

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Storage储存：Electrodes should be stored in dry conditions. Should the electrodes ?become damp, re-dry for one hour at 150°C?before use. 焊条应储存在干燥环境中。如果焊条受潮，应在150°C下重新干燥1小时后再使用。??

局部修复优势：

1. ü 快速维修。
2. ü 经济性好。
3. ü 很少或无需加工。
4. ü 节省新模具的成本。
5. ü 焊接材料性能可能远超过母材。
6. ü 耗材选择广泛。