Thank you Dave, for bringing this tough steel to our notice.
In the fact sheet on the steel, the thing I checked first was the End Milling
section.
Cutting Parameters High Speed Steel Carbide: Insert
Carbide: Solid
metres/minute 8 to 12 110 to 160
60 to 80
Feet/minute 26 to 40 360 to 525
200 to 260
Very different from the 100 fpm in school, and 250 fpm in a machine shop,
for free cutting steel wen using High Speed Steel.
The choice of steel depends on what you can buy, what you are making, and what
you are doing.
James Isaac.
________________________________
From: Dave Pape <[email protected]>
Sent: April 11, 2020 12:56 PM
To: [email protected] <[email protected]>
Subject: [Emc-users] Easy to heat treat high speed tool steel
Have a look at Uddeholm Vanadis 4 Extra SuperClean. Uddeholm has more types
of tool steel to choose from. This is from Uddeholm PDF.
Pre-heating temperature: First pre-heating at600–650°C (1110–1200°F) and
second at 850–900°C (1560–1650°F)Austenitizing temperature: 940–1180°C
(1725–2160°F), normally 1020°C (1870°F).• For large sections, i.e. >70 mm
(2.75") use 1060°C (1940°F).• For the very best wear resistance use
1100–1180°C (2010–2160°F).Soaking time: 30 min. for hardening tempera-tures
up to 1100°C (2010°F), 15 min. fortemperatures higher than 1100°C
(2010°F).Note:
Soaking time = time at hardening tem-perature after the tool is fully
heated through.A holding time of less than recommended timewill result in
loss of hardness.Protect the tool against decarburization andoxidation
during hardening.Further information can be found in theUddeholm brochure
“Heat treatment of toolsteels.
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