Machining process for high-speed steel surface-replaceable blade

[0037]Example 1

[0038]The processing process of a high-speed steel interchangeable blade in Example 1 is basically as attachedfigure 1 As shown, it specifically includes the following steps:

[0039]Step 1: Prepare high-speed steel material, the model of high-speed steel material is high-speed steel W6Mo5Cr4V2;

[0040]Step 2: Cold-rolling the high-speed steel sheet material in step 1 to form a high-speed steel sheet;

[0041]Step 3: Press blanking of the high-speed steel plate in step 2 to form a rough blade; the surface of the rough blade after blanking is square, and a mounting hole 101 is vertically arranged at the center of the rough blade;

[0042]Step 4: Vacuum quench the rough blade in step 3, and quench and heat the rough blade in stages;figure 2 As shown, in the first stage of quenching, the rough blade is heated to 640-660°C at a constant speed and the temperature is maintained for 2.4-2.5h; in the second stage of quenching, the rough blade is heated to 840-860°C at a constant speed and the temperature is maintained at 1.9- 2.1h; in the third stage of quenching, the rough blade is again heated to 1000-1100℃ at a constant speed, and the temperature is maintained for 1.4-1.6h; in the fourth stage, the rough blade is again heated at a constant speed to 1180-1220℃, and the temperature is maintained at 0.4 -0.6h; then carry out vacuum cooling of the rough blade; then carry out tempering treatment on the rough blade, and carry out tempering treatment on the rough blade in stages;figure 2 As shown, during the first stage of tempering, the rough blade is heated to 250-270℃, and the temperature is maintained for 1.4-1.6h, and then the rough blade is water-cooled; then the second stage of tempering is performed to heat the rough blade To 250-270℃, and keep the temperature for 1.4-1.6h, then water-cool the rough blade; then perform the third stage tempering, heat the rough blade to 520-540℃, and keep the temperature for 1.4-1.6h, then Air-cool the rough blade again to complete the tempering treatment of the rough blade to form a refined blade, the hardness of the refined blade is 63-70HRC;

[0043]Step 5: Perform sharpening on all four sides of the refined blade in step 4 to formFigure 4 The finished blade 10 is shown, and the metallographic structure in the finished blade 10 is asimage 3 As shown, the grain size is 50μm.