GEN 55 Overview
GEN 55 is used for TIG and MIG welding of cast iron. This filler metal is extensively employed to overlay cast iron rolls. It is also used to repair castings. The weld metal of GEN 55 is harder than that of GEN 99. However, machining can be accomplished by using carbide tipped tools. A preheat and interpass temperature of 350°F (175°C) minimum is recommended during welding, without which the weld and heat affected zones could develop cracks.
AWS 化学成分（典型）
| %C | %Mn | %Ni | %Cu | %Al |
|---|---|---|---|---|
|
2.0 max. 0.635 |
2.5 max. 0.44 |
45 – 60 55.2 |
2.5 max. 0.60 |
1.0 0.003 |
| %Si | %Fe | %S | 其他合计 |
|---|---|---|---|
|
4.0 max. 0.14 |
雷姆。 42.89 |
0.03 max. 0.002 |
1.0 max. |
典型的焊接金属机械性能
| 抗拉强度 | 84,000 psi | 579 MPa |
| 屈服强度 | 59,500 psi | 410 MPa |
| 伸长 | 30% |
Typical Welding Parameters
| 过程 | Diameter | Voltage | Amperage | Gas/Flux |
|---|---|---|---|---|
| 氩弧焊 (GTAW) | 1/16” (1.6 mm) | 14 – 18 | 90 – 130 | 100% Ar |
| 3/32” (2.4 mm) | 15 – 20 | 120 – 175 | 100% Ar | |
| 1/8” (3.2 mm) | 15 – 20 | 150 – 220 | 100% Ar | |
| 米格 (GMAW) | .035” (0.9 mm) | 26 – 30 | 160 – 190 | 75% Ar – 25% He |
| .045” (1.1 mm) | 28 – 32 | 180 – 220 | 75% Ar – 25% He |