Metal Casting Zone Info Blog

Posts Tagged ‘point’

Changing Metal Properties With Heat Treatment

Throughout history people have been creating things from different metals. Presumably the discovery of metal was an accident and probably caused inadvertently when a campfire burnt away some low melting point metal bearing ore and left the bewildered ancient with a crude metal lump.

Most likely the first such metal would have been tin as this has the lowest melting point by far of all other common metals. At two hundred and thirty two degrees centigrade the core of the fire would not have to be particularly hot to extract tin unlike iron which needs one thousand five hundred and thirty degrees to melt.

The melting point of metals vary a great amount and as the discovery of tin extraction became more and more understood and easier to achieve, the ancients of Mesopotamia and at the same time China, began looking for other metals. Tin was a useful metal but far too soft to create anything much more than plates, pots and ornaments. The next big step was the discovery of copper with tin deposits and this alloy we know of as bronze.

With a melting point of just under one thousand degrees centigrade, bronze could be fashioned into a much stronger finished product. For the first time metal swords and other weapons could be made as well as intricate jewellery mounted with precious stones.

Today bronze is still a valued alloy. With the addition of less than one per cent phosphor, the alloy can be easy to cast with an exceptionally smooth finish. This tough alloy known as phosphor bronze has a very low coefficient of friction making it ideal and nearly always the preferred metal of ships propellers. It has the additional property of not sparking which makes it ideal for electrical contacts. Screws made of phosphor bronze are used whenever there is the threat of electrical shorting and water.

Any metal can be heated to change its properties and every metal has some unique uses. Heat treatment of steel along with quick but not harsh cooling can toughen the original product. During heating magnetic alignments can be changed and this will also change the properties of the original.

Heat treatment is used to add subsidiary metals creating alloys for very specific uses. There are many types of aluminium alloys for specific purposes and NASA and European as well as Russian space agencies all use the same particular Aluminium alloy for their space craft.

Over thousands of years men have been making things out of pure metals and alloys. The values of all metals can change with the discovery of new uses. For example, when catalytic converters were first discovered in the late 1980s the catalyst used in the exhaust system to convert carbon monoxide into harmless air and water was a mix of palladium and rhodium. Prices of these two metals shot up in value and later when more cars were being produced globally with diesel engines, palladium dropped heavily as Platinum took over.

Ornamental iron and wrought iron components

Founded in 1997, Luyi Forge Ltd. has become the biggest producer of ornamental wrought iron components in China.

We started this business with Italian companies, so that is why all our products are of Italian designs. And our quality is also of Italian standard. Until now we are exporting to more than 50 countries, like Italy, Spain, USA etc., and enjoy good reputation among our customers. With our good quality and competitive prices, we can help our customers to keep the leading position in the market.

Our products mainly include the following:

1. Stamped spears & studs, steel balls;

2. Forged pickets;

3. Flower panels and balusters;

4. Scrolls, rosettes, & rings;

5. Leaves and flowers;

6. Gate accessories, like hinges, wheels etc.

7. Cast steel & cast iron decoration;

8. Wrought iron steel bars;

9. Finished products like wrought iron gates, fences, finished projects.

such as:

Wrought iron spear point
Hot stamped with mild steel, can be welded and galvanized.
The spear point was first introduced as a weapon. Today, the steel spear point can be found almost everywhere, as it has become a versatile accompaniment to gates and fences. The steel spear point can add extra security to your fence or gate, making it more difficult for someone to climb over it.

We will be very glad to produce many other new items in this business with customers’ designs or samples.

Our products are widely used on wrought iron gates, wrought iron fences, wrought iron stairs, wrought iron balconies and many other metal art works.

All customers both at home and abroad are welcome to our company for negotiating business.  We will take you to visit our factories, and we can assure you we will try our best to provide the best products and service for you.