heat-treated S2 steel alloy – machining

[petro1headParticipant @petro1head]

[petro1headParticipant @petro1head]

What cutting tools will cut this as HSS dont

[David George 1Participant @davidgeorge1]

Hi the steel is a W type vanadium steel and it should be machine able with a quality HSS cutter but I would recommend using a carbide cutter. Is it turning or milling that you are doing to said material. It is used for shock loaded tooling punches, chisels etc. you can anneal and re harden if necessary without deformation and doesn't fracture like high carbon steel.

David

[not done it yetParticipant @notdoneityet]

This might be a useful read from the net:

**LINK**

There is more info for an internet search.

I’m sure carbide will cut it. Angle grinder discs will cope easily, I would have thought.

[petro1headParticipant @petro1head]

Posted by David George 1 on 10/11/2019 14:26:25:

Hi the steel is a W type vanadium steel and it should be machine able with a quality HSS cutter but I would recommend using a carbide cutter. Is it turning or milling that you are doing to said material. It is used for shock loaded tooling punches, chisels etc. you can anneal and re harden if necessary without deformation and doesn't fracture like high carbon steel.

David

 

I did wonder about heating it up and then allowing to cool slowly

Its actually a 12mm socket that I want to mod

Have also concidered attacking with a grinder   In fact it would be nice if you could buy a lathe and mill attachment to use a grinder and a cutting tool

Edited By petro1head on 10/11/2019 16:58:18

[David George 1Participant @davidgeorge1]

When at work I would have just put it on the cylindrical grinder and plunge ground to whatever size. For instance I have some countersinks which I made from drills like 1 1/4" diameter ground down to 1/2" diameter in HSS no problem. Do you know anyone with a cylindrical grinder?

David

[not done it yetParticipant @notdoneityet]

I did wonder about heating it up and then allowing to cool slowly

See the link I posted – the bit about annealing. Temperature is quoted quite specifically and cooling rate is very prescriptive and over a rather extended period! Another site does quote a less restrictive cooling rate, mind.

I have a programmable kiln, so possible for me – but not appropriate for most on the forum, I guess. Not a particularly economic job for one item – especially if the lower cooling rate is correct!😳

[Neil LickfoldParticipant @neillickfold44316]

You can turn hardened S2 with ceramic turning inserts. Dry cutting is about 90m/min surface speed or 900rpm.

Depth of cut with a 0.4mm radius tool is 0.2mm so 0.4mm on diameter max depth, and a feed rate of 0.06mm per rev, or 2 thou per rev. So a very fine feedrate.

Seco make series TH1000 grade insert, in a few geometries , these will also cut hardened steel, but at 25 to 50 m/min, so 1/2 to 1/4 the surface speed of the ceramic inserts.

The above inserts are available to the TNMG16 tool holders, the triangle 6 edges, negative holders.

Neil

[petro1headParticipant @petro1head]

Well I heated it up until yellow then allowed to cool in the house (Don't tell girlfriend)

Jobs a goodun and project done

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