Integral quenching type land leveller blade manufacturing method and quenching die
An overall quenching and grader technology, which is applied in the direction of quenching devices, manufacturing tools, furnace types, etc., can solve the problems that affect the reliability of the grader, the service life of the blade is not long, and affect the quality of the road surface, so as to improve the reliability of the whole machine Sex and construction efficiency, high production efficiency, and the effect of saving production time and manufacturing cost
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Embodiment 1
[0029] Embodiment 1: A kind of overall quenching process of the shovel blade of a grader. The blade material is 65Mn alloy steel. First, the 65Mn raw material is processed into a shovel blade of a grader, and then the blade is hot-pressed, integrally quenched and tempered. The specific steps For: (1). Hot press forming, overall quenching: heat the blade to 800°C and put it into the quenching mold, press the quenching mold with a pressure machine to the set pressure parameter of 3.0×10 6 ~4.0×10 6 N, and then pass quenching oil with a temperature of 20°C into the quenching mold to quench the blade; hot pressing forming and overall quenching are completed at the same time; (2). Tempering treatment: put the blade that has completed step 1) into the back In the furnace, after heating to 280°C, keep it warm for 120 minutes, and then take it out of the furnace and air cool. The grader shovel blade hardness after the above treatment is 52-57HRC.
[0030] The quenching die used in t...
Embodiment 2
[0031] Example 2: First process the 65Mn raw material into a grader shovel blade, and then perform hot-press forming, overall quenching and tempering treatment. The specific steps are: (1). Hot-press forming, overall quenching: after the blade is heated to 810°C Put it into the quenching mold, press the quenching mold with a pressure machine to the set pressure parameter 3.0×10 6 ~4.0×10 6 N, and then pass quenching water with a temperature of 30°C into the quenching mold to quench the blade; hot pressing forming and overall quenching are completed at the same time; (2). Tempering treatment: put the blade that has completed step (1) into the back In the furnace, after heating to 400°C, keep it warm for 100 minutes, and then take it out of the furnace and air cool. The grader blade hardness after the above treatment is 43-48HRC.
[0032] The quenching die used in this embodiment, such as Figure 5 Shown, comprise upper mold 7, lower mold 8, upper mold holder 5 and lower mold...
Embodiment 3
[0033] Example 3: first process the 65Mn raw material into a grader bulldozer blade, and then carry out hot pressing forming, overall quenching and tempering treatment. The specific steps are: 1 hot pressing forming, overall quenching: heat the blade to 820°C and put into the quenching mold, press the quenching mold with a pressure machine to the set pressure parameter of 2.0×10 6 ~3.0×10 6 N, and then pass into the quenching mold with quenching water at a temperature of 40°C to quench the blade; hot pressing forming and overall quenching are completed simultaneously; 2 Tempering treatment: put the blade that has completed step 1) into the tempering furnace, heat After reaching 430°C, keep it warm for 90 minutes, and then take it out of the furnace to air cool. The hardness of the grader blade after the above treatment is 40-45HRC.
[0034] The quenching die used in this embodiment, such as Figure 6Shown, comprise upper mold 7, lower mold 8, upper mold holder 5 and lower m...
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