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MWA特種鋼氬弧焊絲MAC TRODE E66 TIG ER312

Austenitic stainless steel filler metal originally designed to weld cast alloys of similar composition, found also valuable in welding dissimilar metals such as carbon steel to stainless steel, particularly those grades high in nickel. It gives a two-phase weld deposit with substantial percentages of ferrite in austenite matrix. Even with considerable dilution by austenite-forming elements such as nickel, the microstructure remains two-phase and thus highly resistant to weld metal cracks and fissures. Due to its high ferrite level, very adapted to heterogeneous welding, especially when one of the components is fully austenitic. Good corrosion oxidation resistance at high temperature due to its high content of Cr. Service temperatures should be below 420°C to prevent formation of secondary brittle phases.

Mac Trode E66 TIG焊絲最初設計用于焊接成分相似的鑄造合金，也適用于諸如碳鋼與不銹鋼(尤其是鎳含量高)等之間的異種金屬焊接。它可產(chǎn)生奧氏體基體中鐵素體含量相當高的雙相焊縫熔敷層。即使在奧氏體形成元素（如鎳等）被大量稀釋的情況下，微觀結構仍然是雙相的，對焊縫金屬微裂紋和開裂仍具有很高的抵抗力。由于其鐵素體含量高，非常適合異種焊接，尤其是當其中一個部件為完全奧氏體時。由于其鉻含量高，在高溫下仍具有良好的耐腐蝕氧化性。焊接時溫度應低于420°C，以防止形成次生脆相。

This grade may be essentially used for:

1. l?welding of stainless steels with similar chemical composition;
2. l?welding of dissimilar steels such as medium and high carbon steels to stainless steel;
3. l?welding and facing of difficult-to-weld steels and unknown steels;
4. l?buffering of layers on tooling prior to surfacing;
5. l?wear facing, where resistance to severe impact is required.

該款焊絲可用于：

1. l?具有類似化學成分的不銹鋼焊接；
2. l?碳鋼與不銹鋼等異種焊接；
3. l?難焊鋼、未知鋼的連接和堆焊；
4. l 工具堆焊前的緩沖層；
5. l?要求耐嚴重沖擊的耐磨堆焊。

TYPICAL APPLICATIONS 典型應用

Use as an under-bead cushion when surfacing tools & dies and for critical joining of composite die assemblies. Dissimilar metal welding of thin tubing, surgical instrument, and dairy equipment.

在堆焊工模具以及復合模具組件的關鍵連接時，用作緩沖層。薄壁管、外科器械和乳制品設備的異種金屬焊接。

適用于碳鋼、彈簧鋼、鉻鎳鋼、釩鋼、高速鋼、錳鋼、工模具鋼、鑄鋼等的維修，以及在應用硬面堆焊合金之前用作緩沖底層。也用于重建化學、建筑和采礦行業(yè)中使用的軸和葉片。

Typical All Weld Metal Chemical Analysis (%)

典型全焊縫金屬化學分析（%）：

Typical All Weld Metal Mechanical Properties（As Welded）

典型全焊縫金屬機械性能（焊態(tài)）：

Tensile Strength 抗拉強度： 840 N/mm2

Elongation延伸率： 25%

Hardness硬度： 220 HB

Sizes Available and Recommended Amperages

尺寸Φ/電流：

Current電流：DC (-)

Related Specification參考標準：ASME SFA A5.9 ER312 ?BS EN ISO 14343 - A - 29 9 Werkstoff 1.4337