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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
Posted to rec.crafts.metalworking
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Do people need CAST IRON bars
I have sold literally hundreds of steel bars on ebay. It is a real
demand item and they always sell. I cut them up on a big bandsaw into pieces that fit flat rate boxes and ship one almost every day. But, right now I am taking apart a big CNC horizontal mill (G&L) and it has four CAST IRON bars for X and Y dimension slides. The X bars are shown he http://igor.chudov.com/tmp/Cast-Iron-Bars.jpg They are about 3x5 inches (did not measure) and maybe 5 feet long. The rust is minimal from just one rain. My questions are 1) are there any uses for cast iron bricks like 3x5x10 inches long 2) Can cast iron be sawed easily 3) Can I guess in any way what kind of cast iron is that? I think that it is a lot easier to sell sawed pieces than whole pieces. thanks |
#2
Posted to rec.crafts.metalworking
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Do people need CAST IRON bars
On Wed, 17 Aug 2016 17:50:33 -0500, Ignoramus5113
wrote: I have sold literally hundreds of steel bars on ebay. It is a real demand item and they always sell. I cut them up on a big bandsaw into pieces that fit flat rate boxes and ship one almost every day. But, right now I am taking apart a big CNC horizontal mill (G&L) and it has four CAST IRON bars for X and Y dimension slides. The X bars are shown he http://igor.chudov.com/tmp/Cast-Iron-Bars.jpg They are about 3x5 inches (did not measure) and maybe 5 feet long. The rust is minimal from just one rain. My questions are 1) are there any uses for cast iron bricks like 3x5x10 inches long Ya' got me. 2) Can cast iron be sawed easily Yes. If it doesn't saw easily, stop. It's not gray cast iron. 3) Can I guess in any way what kind of cast iron is that? Just call it "gray cast iron." Even if it's some kind of Meehanite, it isn't going to be white or ductile. Gray iron is generic. -- Ed Huntress I think that it is a lot easier to sell sawed pieces than whole pieces. thanks |
#3
Posted to rec.crafts.metalworking
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Do people need CAST IRON bars
On Wed, 17 Aug 2016 17:50:33 -0500, Ignoramus5113
wrote: I have sold literally hundreds of steel bars on ebay. It is a real demand item and they always sell. I cut them up on a big bandsaw into pieces that fit flat rate boxes and ship one almost every day. But, right now I am taking apart a big CNC horizontal mill (G&L) and it has four CAST IRON bars for X and Y dimension slides. The X bars are shown he http://igor.chudov.com/tmp/Cast-Iron-Bars.jpg They are about 3x5 inches (did not measure) and maybe 5 feet long. The rust is minimal from just one rain. My questions are 1) are there any uses for cast iron bricks like 3x5x10 inches long 2) Can cast iron be sawed easily 3) Can I guess in any way what kind of cast iron is that? I think that it is a lot easier to sell sawed pieces than whole pieces. thanks One caveat on the sawing: If these are bedways, they are likely to be flame- or induction-hardened. It will be a thick case. If you can't saw it, that's likely to be the reason. Those cases require annealing, but you don't have to get fancy about it. You won't have to soak them. -- Ed Huntress |
#4
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Do people need CAST IRON bars
On 08/17/2016 5:50 PM, Ignoramus5113 wrote:
.... 1) are there any uses for cast iron bricks like 3x5x10 inches long .... Serious paper weights??? Always be handy on a bench as a small portable anvil or the like... -- --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
#5
Posted to rec.crafts.metalworking
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Do people need CAST IRON bars
On Wed, 17 Aug 2016 17:50:33 -0500, Ignoramus5113
wrote: I have sold literally hundreds of steel bars on ebay. It is a real demand item and they always sell. I cut them up on a big bandsaw into pieces that fit flat rate boxes and ship one almost every day. But, right now I am taking apart a big CNC horizontal mill (G&L) and it has four CAST IRON bars for X and Y dimension slides. The X bars are shown he http://igor.chudov.com/tmp/Cast-Iron-Bars.jpg They are about 3x5 inches (did not measure) and maybe 5 feet long. The rust is minimal from just one rain. My questions are 1) are there any uses for cast iron bricks like 3x5x10 inches long This cast iron makes GREAT copies of KDK and Aloris toolholders..and you can machine a set yourself quite easily. I use a fair amount of OLD cast iron for jigs, fixtures and tooling of all sorts. 2) Can cast iron be sawed easily Depends on what kind of cast iron it is. Some of it is very easy to cut. Other kinds of it...is a bitch to cut. Grab some cast iron sash weights and put on a good blade. You will scratch it..and rip the teeth off your blade. 3) Can I guess in any way what kind of cast iron is that? Good question! I think that it is a lot easier to sell sawed pieces than whole pieces. thanks Im sure it is..shipping along would be a consideration..and a bitch. Gunner --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
#6
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Do people need CAST IRON bars
On 2016-08-18, Gunner Asch wrote:
On Wed, 17 Aug 2016 17:50:33 -0500, Ignoramus5113 wrote: I have sold literally hundreds of steel bars on ebay. It is a real demand item and they always sell. I cut them up on a big bandsaw into pieces that fit flat rate boxes and ship one almost every day. But, right now I am taking apart a big CNC horizontal mill (G&L) and it has four CAST IRON bars for X and Y dimension slides. The X bars are shown he http://igor.chudov.com/tmp/Cast-Iron-Bars.jpg They are about 3x5 inches (did not measure) and maybe 5 feet long. The rust is minimal from just one rain. My questions are 1) are there any uses for cast iron bricks like 3x5x10 inches long This cast iron makes GREAT copies of KDK and Aloris toolholders..and you can machine a set yourself quite easily. I use a fair amount of OLD cast iron for jigs, fixtures and tooling of all sorts. And -- for smaller chucks and lathes, can be used to make backplates. 2) Can cast iron be sawed easily Depends on what kind of cast iron it is. Some of it is very easy to cut. Other kinds of it...is a bitch to cut. Grab some cast iron sash weights and put on a good blade. You will scratch it..and rip the teeth off your blade. Typically -- it has large carbide crystals embedded in it. Even tears up an angle grinder when you try to use that to cut it. Maybe, if kept in a hot fire, and then allowed to cool *very* slowly in a bed of ashes, it might anneal it a bit. 3) Can I guess in any way what kind of cast iron is that? Good question! The case hardening mentioned a few articles back is a likely thing. You may need an angle grinder to get under the case before sawing it. Good Luck, DoN. -- Remove oil spill source from e-mail Email: | (KV4PH) Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#7
Posted to rec.crafts.metalworking
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Do people need CAST IRON bars
On 19 Aug 2016 01:30:46 GMT, "DoN. Nichols"
wrote: On 2016-08-18, Gunner Asch wrote: On Wed, 17 Aug 2016 17:50:33 -0500, Ignoramus5113 wrote: I have sold literally hundreds of steel bars on ebay. It is a real demand item and they always sell. I cut them up on a big bandsaw into pieces that fit flat rate boxes and ship one almost every day. But, right now I am taking apart a big CNC horizontal mill (G&L) and it has four CAST IRON bars for X and Y dimension slides. The X bars are shown he http://igor.chudov.com/tmp/Cast-Iron-Bars.jpg They are about 3x5 inches (did not measure) and maybe 5 feet long. The rust is minimal from just one rain. My questions are 1) are there any uses for cast iron bricks like 3x5x10 inches long This cast iron makes GREAT copies of KDK and Aloris toolholders..and you can machine a set yourself quite easily. I use a fair amount of OLD cast iron for jigs, fixtures and tooling of all sorts. And -- for smaller chucks and lathes, can be used to make backplates. 2) Can cast iron be sawed easily Depends on what kind of cast iron it is. Some of it is very easy to cut. Other kinds of it...is a bitch to cut. Grab some cast iron sash weights and put on a good blade. You will scratch it..and rip the teeth off your blade. Typically -- it has large carbide crystals embedded in it. Even tears up an angle grinder when you try to use that to cut it. Maybe, if kept in a hot fire, and then allowed to cool *very* slowly in a bed of ashes, it might anneal it a bit. 3) Can I guess in any way what kind of cast iron is that? Good question! The case hardening mentioned a few articles back is a likely thing. You may need an angle grinder to get under the case before sawing it. Good Luck, DoN. Different Types Of Cast Iron Cast iron is a ferrous alloy that is made by re-melting pig iron in a capola furnace until it liquefies. The molten iron is poured into molds or casts to produce casting iron products of the required dimensions. Based on the application of cast iron, the alloying elements added to the furnace differ. The commonly added alloy elements are carbon followed by silicon. The other alloying elements added are chromium, molybdenum, copper, titanium, vanadium, etc. How is cast iron classified? Based on the alloying elements added, the variation in the solidification of the cast iron and heat treatment used, the microstructure of the cast iron can vary. Depending upon the application and the preferred mechanical properties, iron castings can be classified into the following. Types of cast iron White cast iron When the white cast iron is fractured, white coloured cracks are seen throughout because of the presence of carbide impurities. White cast iron is hard but brittle. It has lower silicon content and low melting point. The carbon present in the white cast iron precipitates and forms large particles that increase the hardness of the cast iron. It is abrasive resistant as well as cost-effective making them useful in various applications like lifter bars and shell liners in grinding mills, wear surfaces of pumps, balls and rings of coal pulverisers, etc. Grey cast iron Grey is the most versatile and widely used cast iron. The presence of carbon leads to formation of graphite flakes that does not allow cracks to pass through, when the material breaks. Instead, as the material breaks the graphite initiates numerous new cracks. The fractured cast iron is greyish in colour, which also gives it the name. The graphite flakes make the grey cast iron exhibit low shock resistance. They also lack elasticity and have low tensile strength. However, the graphite fakes gives the cast iron excellent machinability, damping features as well as good lubricating properties making them useful in many industrial applications. The graphite microstructure of the cast iron has a matrix that consists of ferrite, pearlite or a combination of two. The molten grey iron has greater fluidity and they expand well during the solidification or freezing of cast iron. This has made them useful in industries like agriculture, automobile, textile mills, etc. Malleable cast iron Malleable cast iron is basically white iron that undergoes heat treatment to convert the carbide into graphite. The resultant cast iron has properties that vary from both grey and white cast iron. In case of malleable cast iron, the graphite structure is formed into irregularly shaped spheroidal particles rather than flakes that are usually present in gray cast iron. This make the malleable cast iron behave like low-carbon steel. There is considerable shrinkage that results in reduced production of cast iron as well increased costs. Malleable cast iron can be identified easily by the blunt boundaries. Ductile cast iron Ductile cast iron is yet another type of ferrous alloy that is used as an engineering material in many applications. To produce ductile iron, small amount of magnesium is added to the molten iron, which alters the graphite structure that is formed. The magnesium reacts with oxygen and sulphur in the molten iron leading to nodule shaped graphite that has earned them the name-nodular cast iron. Like malleable iron, ductile iron is flexible and exhibits a linear stress strain relation. It can be casted in varied sizes and into varying thickness. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
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