vanadium spike

Can you give a few more details?

I want to find out if using a vanadium spike wire would increase the ultimate strength of our wire product that uses a carbon steel wire.

Thanks for the quick answer. That's outside my area.

I want to find out if using a vanadium spike wire would increase the ultimate strength of our wire product that uses a carbon steel wire.

The word spike has quite a few meanings, none of which make sense (to me) in your sentence.

Do you possibly mean spoke? If so, clearly replacing carbon steel with most any appropriate alloy steel will increase the strength of the final product. If not, please elaborate on your meaning of spike wire.

By spike I mean adding vanadium to the steel.

Thank You!

Now it sounds like you are talking about making your own alloy! Why don't you just look up the strengths of existing alloys, and make a compromise between strength, corrosion resistance, etc. and cost?

Actually, the fact is that some mills lack the technology to use aluminum as the grain refiner, due to tundish issues and so use Vanadium as the grainrefiner/deoxidizer.

These mills are electric furnace mills, and as such also run higher residuals because of scrap feed as well as higher ppm nitrogen compared to BOF steel.

So there is a pick up in properties attributable to an addition of vanadium, oif all things are equal; however, in many cases where Vanadium is shown in the analysis, the pick up in mechanical properties is also a result of the synergies of process, residuals in scrap, and Nitrogen.

For everyones information, in the steel business here in North America, when we adjust a single element like this , we callit "needle"- A small amount of an element; "we needled the Chromium". Or we call it a "spike," where we put in a larger quantity, but not enough to make it a different grade.

I have some data at work I'll take a look at monday.

Had I worked more in the melt shop I'd have memorized that; I worked mostly in the lab and didn't burn in the practice info.

milo

Thanks Milo:

I look forward to your comments.

Indydog

Yep.

milo

I found my notes.

The addition of 0.1wt % of Vanadium to the base steel is to increase the yield strength from 593+/- 28 Mpa to 725 +/- Mpa; approx. 65 MPA of this increase can be attributed to the finer interlammelar spacing resulting from the Va addition; about 70 Mpa is derived from precipitation hardening. This was a study on tire cord .67 carbon.

On a study of steering control arm parts compared to C45N the addition of .08 -.13 Vanadium resulted in a UTS of 750-900 N/mm^2 compared to 650-740 N/mm^2.

comparing 1040 to 1040 with vanadium

1040 Hot roll properties Ys 399 Mpa; UTS 652 Mpa 18.5 % el in 2"; 44 % RA.

1040V (.16 Va) (spike) Hot roll Ys 572 Mpa;802 UTS;21.5 %el; 49 %ra;

I am not warranting anticipated property pickups, only providing data.

Remember these are NON martensitic structures. Typically theseVanadium treated steels resist work softening in cyclic loading, unlike plain carbon colddrawn steels

These data are from research published by my colleagues in the early 1990's Bill Heidtman and Debanshu Bhattacharya at inland; Tony DeArdo (bethlehem and Univ. of pittsburgh and others). I got to provide samples of bars for some of this work, which ultimately shows that while vanadium addition can augment the strength increase of cold drawing, it can also in many cases allow for the elimination of cold drawing while delivering improved toughness and ductility. Machinability seldom is improved.

Enjoy.

milo

Thank you Milo, this is very interesting and very helpful.

Indydog

Thanks for educating me! We just buy standard alloys - we have to for aerospace applications...

Dick