While all the ductile materials can be forged , forgeability of the metal at the forging temperature depends upon the crystallographic structure, the melting point, yield strength, strain rate and dry friction.
The metal or alloy to be forged is usually purchased as hot rolled bars or billets with round or rectangular cross sections. The following materials are ranked in order of increasing forging difficulties.
1. Aluminum alloys (GF)
2. Magnesium alloys (GF)
3. Copper Alloys (GF)
4. Carbon/low-alloy steels (GF)
5. Marten, stainless steels (SD)
6. Maraging Steels (SD)
7. Austen.. Stainless Steels (SD)
8. Nickel Alloys (SD)
9. Titanium Alloys (D)
10. Iron - base super alloys (D)
11. Cobalt-base super alloys (D)
12. Tantalum Alloys (D)
13. Tungsten Alloys (VD)
14. Beryllium (VD)
Note :
The forgeability of the above mentioned materials are categorized as good (GF), somewhat difficult (SD), difficult (D) , and very difficult (VD) and has been indicated in the brackets.
Comments
Post a Comment