A quenching and tempering process for small-diameter cold rolling rolls
A technology of cold rolling and small diameter, which is applied in the quenching and tempering process of small diameter cold rolling, which can solve the problems of long production cycle and large number of counts, and achieve the effect of clean quenching and tempering process and shortened production cycle
Active Publication Date: 2017-09-01
YIXING YONGCHANG ROLL
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Problems solved by technology
[0002] For the quenching and tempering of batches of small diameter (≤Φ250) cold rolling rolls, the number of counts is large, and the quenching and tempering is carried out one by one, and the production cycle is long
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Embodiment 1
[0025] Select a small-diameter cold roll for quenching and tempering treatment, such as Figure 1-2 As shown, the specific process is: (1) Carry out flaw detection on the roll blank 2; (2) Roughly process the qualified roll blank 2 according to the drawing; (3) Put the roll blank 2 into the furnace, and determine the bottom stacking five Support roll blanks 2, and then successively reduce and stack roll blanks 2 upwards layer by layer, and stack fourteen roll blanks 2 in total. The roll blanks 2 are separated by brackets 1 and the distance between the roll blanks 2 is guaranteed to be 10mm; (4) Carry out heat treatment on the roll billet. In stage one, the temperature is raised to 350°C for preheating and heat preservation for 2 hours. In stage two, the temperature is raised to 650°C for heat treatment and heat preservation for 2 hours. In stage three, the temperature is raised to 900°C for heat treatment and heat preservation for 1 hour. The description is: the heating rate i...
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The invention discloses a tempering process for small-diameter cold rolls. The steps of the tempering process are: (1) performing flaw detection on the roll blank; (2) putting the roll blank into the furnace; (3) carrying out the rolling blank Heat treatment, stage 1: raise the temperature to 320-350°C for preheating and keep it warm for 1-2h, stage 2 raise the temperature to 640-670°C for heat treatment and hold it for 2-3h, stage 3 raise the temperature to 860-930°C for heat treatment Heat treatment and heat preservation for 1‑2h; (4) Lift out the resistance furnace as a whole after heat treatment, put it in the cooling tank for cooling for 7‑9min; (5) Lift it out after cooling, and carry out air cooling for 10‑15min; (6) Lift it in Resistance furnace, transfer to tempering process; (7) After tempering is completed, the quenching and tempering process is completed by testing. The quenching and tempering process of the present invention shortens the production cycle when producing batches of small-diameter cold rolls, and the entire quenching and tempering process is clean and pollution-free.
Description
technical field [0001] The invention relates to a production method of rolls, in particular to a quenching and tempering process for small-diameter cold rolls which can be tempered in batches. Background technique [0002] For quenching and tempering batches of small-diameter (≤Φ250) cold rolling rolls, there are many counts, and the quenching and tempering is carried out one by one, and the production cycle is long. Contents of the invention [0003] The object of the present invention is to provide a quenching and tempering process for small-diameter cold rolls that can be tempered in batches in order to solve the problems in the prior art. [0004] The purpose of the present invention is solved by the following technical solutions: [0005] A tempering process for small-diameter cold rolls, characterized in that: the steps of the tempering process are: [0006] (1) Carry out flaw detection on the roll blank; [0007] (2) Roughly process qualified roll blanks accordin...
Claims
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IPC IPC(8): C21D1/25C21D9/38
Inventor 曹旭朱明俊
Owner YIXING YONGCHANG ROLL