High-speed tool steel circular saw blade heat treatment process capable of preventing quenching deformation
A high-speed tool steel, quenching and deformation technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve problems such as easy deformation and cracking, and achieve the effects of improving surface roughness, avoiding quenching deformation and cracking, and high hardenability
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Embodiment 1
[0024] An embodiment of the present invention provides a high-speed tool steel circular saw blade heat treatment process for preventing quenching deformation, which includes the following steps:
[0025] S1. Annealing: After the saw blade is pretreated to obtain the saw blade matrix, use isothermal spheroidization annealing, first preheat to 260°C, then heat to 860°C for heat preservation, quickly cool to 720°C isothermal, and take out the furnace below 500°C, and cool to At room temperature, the structure after annealing is sorbite and granular carbide, with a hardness of 207-255HBW; because the austenite stability of high-speed tool steel is very good, martensite structure will also appear after forging, with high hardness, eliminating Forging stress, reducing hardness, improving machinability, and preparing tissue for quenching;
[0026] S2. Quenching: The surface of the saw blade substrate is evenly coated with a laser light-absorbing coating, dried, and subjected to laser...
Embodiment 2
[0040] An embodiment of the present invention provides a high-speed tool steel circular saw blade heat treatment process for preventing quenching deformation, which includes the following steps:
[0041] S1. Annealing: After the saw blade is pretreated, the saw blade substrate is obtained. Using isothermal spheroidization annealing, first preheat to 370°C, then heat to 870°C and keep it warm, and cool down to 720°C at a rate of 20°C / h. ℃ for 2 hours, cooled to 480 ℃ in the furnace, cooled to room temperature, and annealed to release the stress; because the austenite stability of high-speed tool steel is very good, martensitic structure will appear after forging, and the hardness is higher, eliminating forging Stress, reduce hardness, improve machinability, and prepare tissue for quenching;
[0042] S2. Quenching: The surface is evenly coated with a laser light-absorbing coating, dried, and subjected to laser quenching treatment. The power of the laser quenching treatment is 75...
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