LC Engineering

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Submerged Arc Welding

• Uses bare wire electrode.
• Fed automatically from spool.
• Generates electric arc to heat metal/
• Flux in powder form.
• Fed using a hopper.
• Electric arc melts joint, flux and electrode.
• Excess flux is collected and re-used.
• Fully automated... (More)

Lower Critical Point

• Occurs at 723°c.
• Temperature change occurs.
• The metal contracts dimensionally, glows less brightly and loses its magnetism.
• Known as Decalescence.

Upper Critical Point

• Varies depending on amount of carbon in the steel.
• Above this point, the metal... (More)

Hardening

Process

• The piece is heated to a cherry red colour and then cooled rapidly in water oils and brine.
• At the cherry red colour the steel will have undergone structural changes (FCC to BCC, martensite) and the rapid cooling... (More)

Monomer: A monomer is a molecule of a compound which reacts with other monomers to form a polymer.

Mer: A mer is a repetitive unit in a polymer.

Addition Polymerisation of Ethylene (Thermoplastics)

• Ethylene consists of 4 hydrogen atoms and... (More)