Dear respected fellows,
Need your valuable suggestions for annealing process temperature .
H13 tool steel with Aluminium chromium base coating used
for die casting dies.
for protection against decarburization you have to use vacuum or controlled atmosphere. heat to 845 to 900 depending on your specimen. higher temp for bigger sections. you have to heat your sample slowly and uniformly specially if it is a hardened tool and hold it from 1 to 4 hours by considering its section size then cool it slowly to 540 dont use higher cooling rates than 30 C degree per hour after 540 cooling rate will not effect your final hardness which will about 190 to 230 HB.
There are two annealing regimes for H13 and are used as per our requirements.
1. Soft annealing by heating to 850 deg.C holding for 1hour /inch followedby cooling @10 deg.C per hour to 500 deg.C and then air cool.
2. Stress relieve anneal by heating to 650 deg.C holding for 1 hour/inch thickness and then slow cooling to 500 deg.C and subsequently cooling in air.
In my opinion you shold use option 2 and use vacuum annealing furnace if available
- Badges
- Science topic
- Similar topics
- Engineering
- Materials Engineering
- Annealing