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Jan Ysselstein

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Jan Ysselstein last won the day on March 23 2017

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  • Location
    west coast of usa ( USACAstan )
  • Interests
    shaping and making of steel and iron

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  1. Jan Ysselstein

    Hearth Steel Ala Emiliano

    Beautiful!
  2. Jan Ysselstein

    'Konasamudram' Process

    Thanks Alan......A very interesting article .....C. Ritter von Schwartz once described a similar process ..I am guessing at the exact wording because I cannot find his quote. Steel was made by adding magnetic sand, some laterite and a bit of charcoal into a crucible and heating it. To most of us familiar with iron and steel that description makes no sense....if the magnetic sand was not magnetite but granulated cast iron the statement would make complete sense and it would be very similar to the method suggested in the article. I have tied to search to see if the term magnetic sand may have been used to describe granulated cast iron. The closest I came was Iron Sand = Cast iron . I think it is quite possible C.R.von Schwartz did have it right and there was confusion of terms. I have done an experiment along these lines and experienced a crucible failure late in the melt...to do this again I would fire the crucible for about 1 hr. before using it..this mix will attack an unfired crucible very quickly.
  3. Jan Ysselstein

    'Konasamudram' Process

    Thanks Joshua.. This topic provides me a lot of pleasure . I see the making of a steel , like the ones most admired in history...as a challenge . If we look at all the steps involved...crucible making , crucible performance, alloy selection...making the iron from ore....melting/cooling practice...forging method...heat treating for max strength and appearance...polishing and etching.. I have done this long enough to have a little bit of experience in all the topics. I am in no hurry but am anxious to get some good results. I have just bought a heat treating furnace and have figured out how to run my gas forge at a low temperatures... Things are coming together...there was a guy Dmytri who used to post here and told me ( a new comer ) it would take a long time before a person can make a good crucible steel....he was sooo correct...I shrugged it off as I had more attitude than skill. For me it is important the challenge is there and remains there. Weaving in what I learn about metallurgy with the historical accounts and what Verhoeven and some of the other modern experts are putting out there is exiting. The intelligence of those that came to this activity before us astonishes me.
  4. Jan Ysselstein

    'Konasamudram' Process

    The two large dendrite pictures just above do not belong to the cut ingot..the dendrite pictures belong to a half an ingot I hope to forge tomorrow. The cut ingot forged quite well , both halves have a very strong dendritic appearance. If I can drag some pictures into this post I will. We are at about 3/8 inches thick, cementite is gathering at the proper place and I will forge to a very flat sheet. The pictures show cementite gathering but the dendrites still recognizable are white...because they are mostly ferrite and will not show any color until later. The screens here and of the large dendrites are 7mm wide. Tomorrow I will forge some odds and ends ( fragments saved from failed runs ) caused by crucible failures.
  5. Jan Ysselstein

    'Konasamudram' Process

    Near the end of page 6 off this thread are two ingots cut in half...I just found them while cleaning up around my charcoal forge. These slices are pretty rough and will be forged only to test the forging sequence I am practicing for a couple of really good ingots ( I will show them when I forge them ) . Here is a picture of the inner surface of one of the slices as we proceed to start forging....the dark areas will be bright and the lighter areas will become dark ( black I hope )
  6. Jan Ysselstein

    Georgian 'Bulat' technology by Zaqro Nonikashvili

    Thank you for posting it.....I am looking forward to reading about it.
  7. Jan Ysselstein

    My initial journey into crucible steels.

    Experimenting with crucible steel is very time consuming and expensive...progress tends to be slow...I totally understand your thinking. Jan
  8. Jan Ysselstein

    Pad for 25# LG Power Hammer

    I have some 4" thick 20" by 48" steel plates I would part with...these are former press platens and should be 4140...I have not have them tested. My 50 sits on 1 and I have another soon to operate 50 sitting on another.
  9. James...I was there a year or two ago and I panicked ...the regular displays of wootz ( damascus ) blades are way above your line of sight and the room is dark. I got so desperate I robbed some toys they had for sale and improvised a light ..but could not find a ladder. Please post your impression when you come back it may have changed. There are a couple of very nice Japanese blades there and other than the disrespect for wootz it is a great museum.....The Turkish Room in Dresden is also recommended ...but here though some very nice blades are at eye level ( behind glass ). The Turkish Room has some amazing metal work aside from steel. I was constantly harassed by the security guys for getting the glass dirty. Bring your own light source to all these places and a large single magnifier as well ...they often can magnify details at 2 ft way or so.
  10. Jan Ysselstein

    'Konasamudram' Process

    Now we have chased some of the cementite to the area containing the micro alloys ...we still have a long way to go as the photo shows a lot of cementite still in the areas that are converting to pearlite. I have what i need from this post and consider it finished....now to some new ingots. I may post a photo if I get back to working with this sample.
  11. Jan Ysselstein

    'Konasamudram' Process

    All the scale on the sample has been removed.....still a little grinding to be done to get at the decarburized area shown in the photo. Though the above photograph field is 7 mm wide the photos below are 13mm wide and give an idea of what the pattern me become. The photos below are posted because I want a good record of what is going on and be able to trace to all back. The two microscope photos ( 13mm field ) show a lot of carbon finely spheroidized and a lot of larger carbon both are cementite...we will try to dissolve both materials ( cannot do one without the other ) and see id we can get one type of cementite to form...right now we have 2.
  12. Jan Ysselstein

    San Mai WIP

    I think the coeff. of expansion for 410 SS is closer to that of 1095 by a lot. 410 contains no Nickel and 1/2 the amount of Manganese. and has to be hardened for maximum corrosion protection.
  13. Jan Ysselstein

    San Mai WIP

    I have no idea but every piece of SS I see around here is 304 or 440 c...I will look up the difference.
  14. Jan Ysselstein

    'Konasamudram' Process

    After a little more forging, we now have this structure and it is creating a problem as even though I do not have the very large cementite fragments ....some of the cementite is getting much larger than neighboring ones..I am targeting a more even distribution of the spheroidal cementite. Next steps are to grind off some serious decarburization on one side and do the finish forging at a lower temperature and to a lower temperature..
  15. Jan Ysselstein

    San Mai WIP

    Is there a reason why you chose that SS and not say 304?
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