home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!usc!rpi!uwm.edu!linac!att!cbnewsk!cbnewsj!att-out!oucsboss!oucsace!bwhite
- From: bwhite@oucsace.cs.ohiou.edu (William E. White )
- Newsgroups: rec.crafts.metalworking
- Subject: Re: anybody do much blacksmithing? how about forge welding?
- Message-ID: <1993Jan22.052207.15733@oucsace.cs.ohiou.edu>
- Date: 22 Jan 93 05:22:07 GMT
- References: <1993Jan20.220849.18869@organpipe.uug.arizona.edu>
- Organization: Ohio University, Computer Science Department
- Lines: 39
-
- In article <1993Jan20.220849.18869@organpipe.uug.arizona.edu> tip@lead.aichem.arizona.edu (Tom Perigrin) writes:
-
- |>I have been trying to forge weld high carbon steel (files or springs)
- |>to soft steel to make tools. I have some success when the soft iron
- |>almost totally encloses the high carbon, but when the high carbon steel
- |>is largely exposed I have a lot of problems with burning. If I
- |>heat it to a yellow heat it doesn't seem to weld, but if I heat it to
- |>a white heat I get burning and cracks running throughout the high
- |>carbon steel.
-
- >Is the high carbon steel more susceptable to Sulfur and other impurities
- >in the coal than soft steel? Should I use commercial coke?
-
- Coke is always a good idea. It's prepurified and the temperatures are easier
- to maintain. The problem with burning the steel is the type of fire. You
- have an oxidizing fire instead of a neutral or reducing fire; you do not
- want to use an oxidizing fire with high-carbon steels as you do not create
- as much slag. You didn't say what kind of flux you were using; all I can
- assume is that it's commercial. Buy some 20 mule team Borax, put it in a
- coffee can, and bake it for a few hours. Grind this up and try it. I have
- good luck with it. The more stuff you add, the more likely you'll get a
- bad weld; stick with something simple. Think about the Vikings, in 800 they
- were forge-welding iron and crucible steels in charcoal fires.
-
- >Should I use a really deep bed of coal? Any suggestions?
-
- No. Increase the air flow for a reducing fire. Increasing the air flow
- causes it to burn at a higher temperature, burning off the oxygen. Hence
- a hotter fire. It works, trust me.
-
-
- Bryian Winner
-
- c/o
-
- --
- | Bill White +1-614-594-3434 | bwhite@oucsace.cs.ohiou.edu |
- | 31 Curran Dr., Athens OH 45701 | bwhite@bigbird.cs.ohiou.edu (alternate) |
- | SCA: Erasmus Marwick, Dernehealde Pursuivant, Dernehealde, Middle Kingdom |
-