Alloy cast iron castings used

2.11 ~ 6.69% carbon content of iron-carbon alloy steel: high carbon steel> 0.69% 0.25 to 0.69% in low-carbon steel <0.25%
Cast iron Category:
1, by C in the presence of cast iron in different forms, can be divided into three categories:
1) Cast Iron: C all in the form of Fe3C, cross-section silver, hard, brittle, hard machining, rarely used to make parts for non-impact conditions, such as roller main purposes: steel-making raw materials can be processed into malleable cast iron.
 2) gray cast iron: C trace elements soluble iron in vitro, all or most of the form of graphite, gray fracture, the most widely used.
3) Ma cast iron: graphite, ledeburite. Are white iron and gray iron transition between the organizations, black and white fracture, pitting. Hard, brittle, difficult to process
2, according to the different forms of graphite, gray iron is divided into:
1) The ordinary gray cast iron: Graphite flakes
2) malleable iron: group flocculent
3) Ductile Iron: spherical
4) CGI: worm-like

metal castings

White metal castings in the home workshop
Pattern done in the mold during the manufacturing process, as long as it is robust enough to be processed The style can be anything to be done. Commonly used materials are styrene, acrylic ester ('perspex' or 'plexiglass') and brass. For example, if you want to reproduce the texture of wood grain, the use of wood; process fidelity is so fingerprints will be reproduced, if you are not careful! Mold for pouring the metal in two parts clamped together. You will need, therefore, give some to consider the shape of the style; there is room for a number of horizontal separation won't be easy in the second part of the mold of any.
Making mold
The mold was made in a small box without the top or bottom. I retain a certain number of different sizes of these, made by tinned iron (jam jar) or brass plate.
First show some plasiticene, so that it is half as thick, like chest deep.
Press box on it like the cut scones (for our North American friends, biscuits), so that you have the box half full plasticene.
Press down to plasticene in style so that it is about to be exposed in the half. For example, Make use of a certain number of impressions arrangement (counter) the two halves of the mold paint brush handle, when you want to pour the metal.
Mix carefully rubber and catalyst, reached an agreement in the packet instructions. In order to allow it to take place where all air bubbles to the surface.
Fill styles and liquid rubber. Set Allow.
Remove plasticene, but the place is now a solid rubber layer in the style and the casting out
Coat the rubber surface with the appropriate release agent.
Fill the box with the remainder of the mixture of liquid rubber and the new setting to allow this
Remove from the box and separate the two halves of rubber. Removal of style