Heat treatment method for inlaid backup roll sleeve
A heat treatment method and backup roll technology, applied in heat treatment furnaces, heat treatment equipment, process efficiency improvement, etc., can solve the problems of roller sleeve scrapping, etc., and achieve the effects of improved wear resistance, reasonable distribution of residual stress, and high quenching temperature
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Embodiment 1
[0037] The sleeve of the nested back-up roll of the present embodiment has chemical components and contents in its material as follows:
[0038] C: 0.48%, Si: 0.40%, Mn: 0.45%, P: 0.015%; S: 0.010%, Cr: 5.11%, Mo: 0.60%, V: 0.15%; the rest is Fe and unavoidable impurities.
[0039] In this embodiment, a heat treatment method for the sleeve of an inlaid back-up roll, the specification of the sleeve is φ1450×1524mm, and the hardness of the outer surface of the sleeve is required to be HSD65-70.
[0040] The method of heat treatment is specifically the following steps:
[0041] A. Steel ingots are smelted, and then the roll sleeve blank is forged, and the roll sleeve blank is subjected to rough machining and ultrasonic flaw detection.
[0042] B. Quenching and tempering the roll sleeve blank, heating the rough processed roll sleeve to a temperature of 920°C, and holding time for 6 hours; tempering the roll sleeve, heating temperature is 680°C, and holding time is 18 hours.
[0...
Embodiment 2
[0049] The sleeve of the nested back-up roll of the present embodiment has chemical components and contents in its material as follows:
[0050] C: 0.40%, Si: 0.2%, Mn: 0.2%, P: 0.025%; S: 0.025%, Cr: 4.5%, Mo: 0.5%, V: 0.1%; the rest is Fe and unavoidable impurities.
[0051] The heat treatment method of a kind of nested back-up roller sleeve of the present embodiment, specifically the following steps:
[0052] A. Steel ingots are smelted, and then the roll sleeve blank is forged, and the roll sleeve blank is subjected to rough machining and ultrasonic flaw detection.
[0053] B. Quenching and tempering the roll sleeve blank, heating the rough processed roll sleeve to a temperature of 900°C and holding time for 5 hours; tempering the roll sleeve at a heating temperature of 650°C and holding time for 15 hours.
[0054] C. Carry out semi-finishing processing and ultrasonic flaw detection on the roller sleeve.
[0055] D. Hoist the roller sleeve processed by the semi-finishing c...
Embodiment 3
[0060] The sleeve of the nested back-up roll of the present embodiment has chemical components and contents in its material as follows:
[0061] C: 0.60%, Si: 1.00%, Mn: 1.00%, P: 0.010%; S: 0.010%, Cr: 6.00%, Mo: 1.00%, V: 0.50%; the rest is Fe and unavoidable impurities.
[0062] The heat treatment method of a kind of nested back-up roller sleeve of the present embodiment, specifically the following steps:
[0063] A. Forging the blank of the roller sleeve, mixing various components to cast the blank of the sleeve of the inlaid backing roller, rough machining, and flaw detection.
[0064] B. Quenching and tempering the roller sleeve blank, quenching the roller sleeve with a power frequency power supply, the heating temperature is 950°C, and the holding time is 10 hours; tempering the roll sleeve, the heating temperature is 700°C, and the holding time is 30 hours.
[0065] C. Semi-finished car processing, flaw detection;
[0066] D. Hoist the blank of the inlaid support ro...
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