Spencer, heat treat first, followed by grinding - which we presume is necessary after the HT - and then split it
This is how we do on one of our other products for a similar application, which is not made of 4xxx.
Better results expected when the raceway is not split
Regards
VS
Thanks Mr. Sen and Mr. IM
Answers to the questions of Mr. Sen:
1. About 150 saws (eac hof 1mm thick) would be clamped together in a mandrel. So the Height of the job lot would be about 150mm. Based on this, we thought of 30 min soaking time
2. We wanted to cool inside the furnace until 500...
We produce circular Saws out of AISI 1074 Steel. The size of the saws are 16" diameter, 0.037" thk.
The desired raw material is 1074 steel in coil form in as rolled condition with a hardness of 28 to 31 HRc.
However, we ended up with one lot of Hardened and Tempered steel strips having a...
Gentlemen
We implemented the suggestion of MetalGuy10. It worked. We sent the coil to a steel mill which has tesnion levelling & cut to length facility.
It took a long time to locate such a facility closer to us and get them to agree to our request.
The coil was passed throught tension...
UncleSyd & MetalGuy(10)
Thanks a lot. Let me answer the questions of Metalguy:
1. The coils (across the width) have a flatness of 0.003" per inch. The coil width is 18.25" and 0.037" thick.
2. We purchased the coils from POSCO twice
First time 2.6T coils x 2 were received and the results...
Thanks UncleSyd. Let me answer your question:
1. We are not hardening the stampings. We get Steel coil with a hardness of 26 to 28 HRC. It is hardened in the mill itself (POSCO).
2. Do you recommend a slower heating cycle ?
3. We do not use thermocouples. We fill the stampings in a metal tub...
We make circular saw blades of 18" dia x 0.037" thick from AISI 1074 steel coil having a hardness of 26 to 28 HRc.
The circular shape is blanked on a die punch and then 150 to 200 pcs of saws are stacked together and sent for sress relieving (in a tub filled with cast iron shavings).
After...
