Casting bainite tempering process
A bainite and casting technology, which is applied in the field of bainite tempering process of castings, can solve the problems of unsatisfactory tempering process, and achieve the effects of low cost, simple tempering process and easy operation.
Inactive Publication Date: 2012-03-21
韦加伟
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AI Technical Summary
Problems solved by technology
[0009] The above tempering processes are not very ideal
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0015] Example 1: Put the quenched gray iron casting into the tempering furnace, slowly raise the temperature (100°C per hour) to 520°C, keep the temperature constant for 3 hours, cool down to 200°C, and then air cool.
Embodiment 2
[0016] Embodiment 2: Put the quenched white casting into the tempering furnace, slowly heat up (100°C per hour) to 540°C, keep the temperature constant for 4 hours, cool down to 180°C, and then air cool.
[0017] The beneficial effect of the invention is that: white quenched castings and gray iron quenched castings can meet the requirements of good comprehensive performance, achieve high plasticity, high toughness, high strength and high wear resistance, and are widely used; the tempering process is simple, low cost, Easy to operate.
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The invention discloses a casting bainite tempering process. The temperature of high-temperature tempering ranges from 520 DEG C to 540 DEG C, a quenched white cast iron is separated from a quenched grey iron casting, the upper limit of the tempering temperature of the quenched white cast iron is 540 DEG C, the lower limit of the tempering temperature of the quenched grey iron casting is 520 DEG C, constant temperature is kept for 3-4 hours, the temperature is reduced to be 200-180 DEG C, and then air cooling is realized.
Description
technical field [0001] The invention relates to a tempering process, in particular to a casting bainite tempering process. Background technique [0002] It is known that there are many articles and reports about "Casting Austempering and Tempering": the purpose of casting austempering is to make the material have high strength and high hardness while having high plasticity and toughness. heat treatment method. In the production of white cast iron, austempering can be used for heat treatment of ploughshares, hammers of pulverizers, blades of shot blasting machines, hinge blades of cement conveyors, etc. In the production of gray cast iron, austempering can be used for machine tool guide rails, engine cylinder liners, machine bodies, wear-resistant plates, etc. [0003] Austempering of castings is mainly used to obtain bainite plus retained austenite matrix structure. The process is to heat the casting to the austenitizing temperature, and carry out austempering after heat ...
Claims
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Inventor 韦加伟
Owner 韦加伟