Spearhead Forging Process ! - Video

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The following is a handicraft forging process for the spearhead :

Material preparation

- Select appropriate steel materials, such as high-carbon steel or spring steel. The quality of the steel directly affects the hardness, toughness and durability of the spearhead. It is required that the steel should have no obvious defects and be of uniform texture !

Heating

- Put the selected steel billet into the heating furnace and heat it to an appropriate forging temperature. This temperature is usually around 1,000 - 1,200 degrees Celsius, so that the steel reaches a plastic state and is convenient for subsequent forging !

Initial forging and shaping

- Take out the heated steel and use a sledgehammer to carry out preliminary forging on the anvil. First, hammer one end of the steel into a pointed shape to initially shape the general shape of the spearhead. During this process, pay attention to controlling the symmetry of the shape !

- Gradually forge the rest of the steel into the main part of the spearhead to make its length, width and thickness meet the design requirements. For example, gradually hammer the root of the spearhead to make it thicker to enhance the strength of the part connected to the spear shaft !

Fine forging

- Use a small hammer for fine forging, carefully process the cutting edge part of the spearhead to make it sharper and more regular. Meanwhile, flatten the surface of the spearhead to remove the unevenness generated during the initial forging !

- For some detailed parts of the spearhead, such as blood grooves (if designed), gradually forge them out with special tools or small hammers to make the shape and depth of the blood grooves uniform !

Quenching treatment

- After the fine forging is completed, carry out quenching treatment on the spearhead. Heat the spearhead to the quenching temperature (usually around 800 - 900 degrees Celsius), and then quickly put it into a quenching medium (such as water, oil, etc.) to cool it down, so as to improve the hardness of the spearhead. The quenching speed and the choice of the quenching medium should be precisely controlled according to the type of steel and specific requirements to avoid defects such as cracking of the spearhead !

Tempering treatment

- The spearhead after quenching is relatively brittle, so tempering treatment is needed to reduce the internal stress and improve the toughness. Put the spearhead into the tempering furnace, heat it to a lower temperature (usually around 200 - 300 degrees Celsius), keep it for a certain period of time (determined according to the size of the spearhead and the characteristics of the steel), and then let it cool naturally !

Grinding and polishing

- Use grinding wheels or sandpapers of different coarseness to grind the surface of the spearhead. First, use coarser abrasives to remove the oxide scale and forging marks on the surface, and then gradually change to finer abrasives to make the surface of the spearhead smooth !

- Carry out fine polishing on the cutting edge part to make the cutting edge sharper and brighter, and also improve the appearance quality of the entire spearhead !