The forging process involved molding the knife at a critically high heat level (typically 900 - 2,000 degrees Fahrenheit) to improve its hardness. Table- 1: Hot forging temperature range for different metals and alloys [1]. Hot forging of steel: The forging temperatures are above the recrystallization temperature, and are typically between 950°C–1250°C. Do not forge below 1500°F (815°C). The temperature to start the forging for soft, low carbon steels is 1,250 to 1,300°C, the temperature to finish forging is 800 to 840°C. Annealing: Heat to 1475°F (800°C). The top picture shows the sword getting up to about 2000 degrees (Bright yellow). Steel Hardening Colour Chart – West Yorkshire Steel Co Ltd, ISO quality steel suppliers, UK delivery only £25 The largest knowledge of steel grades online. For accurate determinations of forging temperatures of the heated part, the optical pyrometers are generally used. Copied from Introduction to Basic Manufacturing Processes and Workshop Technology by Rajender Singh. It can be easily gas or arc welded, but electrodes of the same composition should be used. And the bottom picture shows the sword at around 1600 degrees … The forge disposes of presses 30 MN, 80MN and of two presses 140 MN. The expanding metal will stretch the existing grains and, if the temperature is within the forging temperature region, will recrystallize and form new strain-free grains. Abstract: Very High Temperature K-Type Thermometer with Ceramic Insulated Probe Sensor for Kiln, Crucible and Forge up to 2372 °F 1300 °C Model CR-8. The forging steels with vanadium or tungsten can have relatively high temperatures at which the carbide fully dissolves, though the amount of carbide is pretty small over a wide range of temperature, so the carbide volume at 1000°C is probably a better indication of forgeability in that case. Wrought iron is best forged at a temperature little below 1,290°C. Can you judge the temperate of the sword in these two pics? Grinding or Machining . Furnace cool to 1200°F (650°C) at a rate not exceeding 50°F (28°C) per hour. This is very important to a blacksmith because it is how the smith knows what the temperature … The forging operation in metal is if finished at a lower temperature, it may lead to cold hardening and cracks may develop in it. 2 Forgeability andforging temperaturesofvarious aluminum alloys Strain, % 150 125 100 75 50 25 0 0 1020 30 40 5060 70 0 5 10 15 260 °C 20 370 °C Cool in still air. Insufficient temperatures will not introduce sufficient plasticity in the metal to shape it properly by hammering etc. I verified temperatures with the more industrial/engineering oriented charts and references, and went with colour names that seemed the clearest to me. This process gives highest mechanical properties among all forging processes. 4.2 out of 5 stars 18. This results in even better resistance to fatigue and stress corrosion than a forging that does not contour the component. Fabrication Operations– and how the product is to be made is a third-level consideration. Feb 20, 2016 - Steel Hardening Colour Chart – West Yorkshire Steel Co Ltd, ISO quality steel suppliers, UK delivery only £25 Great color chart for iron temps. $6.39 shipping. Warm forging done at the temperature about 40 percent of its melting point temperature. Forging of alloy steels is done at this color. 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