600 alloy has a very good high temperature resistance to dry chlorine and hydrogen chloride gas corrosion performance, while a good heat-resistant alkaline corrosion resistance. Pure nickel 200/201 is more suitable for the treatment of high concentrations, high temperature lye, but for ammonium hydroxide Solution, and the presence of sulfide, and the need for site welding site, then the 600 alloy is more suitable in the heat treatment industry and RA330 application is very similar.
Combined with high strength, hot and cold processing performance and corrosion resistance. And the alloy exhibits good heat resistance, and no aging corrosion or stress corrosion occurs during the entire annealing to severe cold working.
chemical component%
| C |
S |
Cr |
Mo |
Ti |
Al |
Mn |
Si |
Ni |
Cu |
| 0.1 |
0.03 |
14~17 |
2.5-3.5 |
1.9-2.4 |
0.1-0.5 |
1 |
0.5 |
72 |
1.5-3.0 |
Heat treatment
600 alloy can not age hardening, only cold hardening. The temperature at which the softening annealing starts is 871 ° C and the annealing is completed by heating at 982 ° C for 10-15 minutes. More than 982 ° C produces undesirable grain growth, but a slight heating at 1038 ° C makes the material fully softened without excessive grain growth. Cooling rate does not affect the softening effect, so you can use water quenching can also be air-cooled.
Processing performance
Thermal processing
The low sulfur reduction furnace atmosphere can be used for forging 600 alloy. Most of the thermal work should be carried out in the 1260-1010 ° C temperature range, and a small amount of hot work can be continued until the temperature drops to 871 ° C. 871-649 ° C between the material ductility is low, not for thermal processing.
Cold working
To achieve higher performance, 600 alloy can be cold under 649 ° C.
Machine plus
600 alloy hot working state and annealing state can be carried out machine. As the material machine will produce a lot of heat over time, should be used high-speed steel, non-ferrous metal casting or carbide cutting tools, and keep the tool sharp.
High-speed steel and non-ferrous metal cutting tool speed of 0.18-0.23m / s, carbide cutting speed of 0.51-0.89m / s. The speed range is the average, according to the actual situation of the workpiece to adjust the speed and feed volume. Lubricants need sulfur-based. In the heating process, such as welding, the need to completely remove the oil.
welding
600 alloy can be used for ordinary welding and brazing.
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