Turning tool machining technology capable of reducing heat damage and improving tempering quality
A technology of tempering quality and processing technology, used in heat treatment furnaces, manufacturing tools, heat treatment equipment, etc., to achieve the effect of improving hardness and wear resistance, reducing heating deformation, and improving machinability
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Embodiment 1
[0015] Turning tool processing technology that can reduce thermal damage and improve tempering quality, including sequential blanking, forging, cutting, heat treatment and grinding, the blank is W2MoCr4V2Co8 high-speed tool steel, and the heat treatment includes sequential Preheating, heating and heat preservation, quenching and tempering, an annealing step is also included between the forging and cutting, and the annealing step is to heat the forged blank step by step: that is, heating from normal temperature to 600-650°C without holding For less than 10 minutes, continue heating to 850-860°C for no less than 20 minutes and then cool slowly. The temperature rise rate of the above heating is not greater than 25°C / h. The tempering step consists of multiple single-step tempering, each single step Tempering means heating the blank obtained in the previous step to 500-550°C, holding it for no less than 0.8h, then air cooling or oil cooling, and the cooling rate of the air cooling a...
Embodiment 2
[0019] This embodiment is further limited on the basis of Embodiment 1. In order to prevent the oil stains on the blank from affecting the heat treatment during the machining process and affect the final quality of the product, a cleaning step is also included between the cutting process and the heat treatment. The cleaning step includes a degreasing cleaning process and a drying process carried out in sequence.
[0020] Further, the quenching and tempering also include sequential degreasing and cleaning processes, drying processes and inspection processes. The set inspection process is to check the quenching quality of the blank, such as the appearance of cracks and thermal deformation, and the observation of the uniformity of quenching, so as to avoid the blanks that do not meet the quality requirements from entering the next step of processing and wasting processing resources.
[0021] In order to prevent the blank from being oxidized during the cooling process and prevent ...
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