Steel for high-toughness rotary blade, and heat treatment method thereof
A heat treatment method and the technology of the rotary tiller, which are applied in the field of metallurgy, can solve problems such as high production cost, high alloy cost, and complicated process, and achieve the effects of low production cost, improved hardenability, and improved toughness
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[0026]Example 1
[0027]Table 1 shows the chemical composition and mass percentage of the steel for the high-toughness rotary tiller in this example.
[0028]The heat treatment method of the high-toughness rotary tiller steel in this embodiment sequentially includes the following steps: quenching, heat preservation, water cooling, tempering and heat preservation. The specific process parameters are: the quenching temperature is 890°C, the heat preservation time is 15min, the water cools to room temperature, and the temperature is 300°C. Fire, keep for 15min.
[0029]The test result of the mechanical properties of the steel for the high-toughness rotary tiller in this embodiment is: the hardness is 46HRC and the impact value is 20J.
[0030]The metallographic structure of the high-toughness rotary tiller steel in this examplefigure 1.
Example Embodiment
[0031]Example 2
[0032]Table 1 shows the chemical composition and mass percentage of the steel for the high-toughness rotary tiller in this example.
[0033]The heat treatment method of the high-toughness rotary tiller steel in this embodiment sequentially includes the following steps: quenching, heat preservation, water cooling, tempering and heat preservation. The specific process parameters are: quenching temperature of 880°C, heat preservation 10min, water cooling room temperature, 320°C tempering , Keep for 21min.
[0034]The test result of the mechanical properties of the steel for the high-toughness rotary tiller in this embodiment is: the hardness is 47HRC and the impact value is 18J.
Example Embodiment
[0035]Example 3
[0036]Table 1 shows the chemical composition and mass percentage of the steel for the high-toughness rotary tiller in this example.
[0037]The heat treatment method of the high-toughness rotary tiller steel in this embodiment sequentially includes the following steps: quenching, heat preservation, water cooling, tempering and heat preservation. The specific process parameters are: the quenching temperature is 915°C, the heat preservation time is 13 minutes, the water cools to room temperature, and the temperature is 290°C. Fire, keep for 22min.
[0038]The test result of the mechanical properties of the steel for the high-toughness rotary tiller in this embodiment is: the hardness is 45HRC and the impact value is 22J.
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