Quenching treatment method for bearing ring
A technology of bearing rings and treatment methods, applied in heat treatment furnaces, heat treatment equipment, heat treatment process control and other directions, can solve the problems of long shaping time, laborious and time-consuming, etc., and achieve the effect of changing shaping process, improving heating method and small deformation.
Active Publication Date: 2016-11-16
WAFANGDIAN ZHENGDA METALLURGICAL MILL BEARING
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Problems solved by technology
[0005] The problems of the traditional quenching process are: the shaping time is long, and the process is time-consuming, laborious and power-consuming
Method used
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Experimental program
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Embodiment Construction
[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] The present invention provides a quenching treatment method suitable for bearing rings. The method is used for quenching large-size bearing rings. In the present invention, it specifically includes the following steps:
[0024] Step S1, heat the bearing ring to be treated once: heat the bearing ring to be treated to Ac1+20°C to Ac1+60°C, and keep it warm for 8-15min; in step S1, firstly lay the bearing ring flat , the plane where the outer edge of the lower end of the bearing ring is located is the bottom surface. Use high te...
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A quenching treatment method for a bearing ring comprises the following steps that the bearing ring is heated to be at the temperature of Acl+20 DEG C to Acl+60 DEG C, and heat is preserved for 8-15 min; the high-temperature bearing ring is subjected to isothermal quenching; the bottom edge of the bearing is subjected to height measurement, and a fixing point is determined; the fixing point is hooked and fixed, the bearing ring is subjected to isothermal quenching, the isothermal quenching temperature is 160+ / -10 DEG C, and the heating time is 2-4 hours; and the bearing ring subjected to secondary heating is measured again, and then third time of heating is conducted on the bearing ring. According to the quenching treatment method for the bearing ring, a tool is used for hooking the position with the largest deformation on the bearing ring, after the bearing ring is heated, the bearing ring deforms due to self weight, and the purpose of self shaping is achieved. An original shaping process is changed, and the repeated heating mode is used, so that the bearing ring achieves the purpose of self shaping under the action of self weight. Deformation of the bearing ring is smaller during heating, internal stress is small, and the hardness and toughness of the bearing ring are improved to a greater degree.
Description
technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a quenching treatment method suitable for bearing rings. Background technique [0002] With the continuous evolution of human civilization and the rapid development of science and technology, the bearing industry started from a weak start, with hard work, fierce competition, and twists and turns. The scale is astounding. [0003] Usually, according to the different types of rolling elements in the bearing, it is divided into ball bearings and roller bearings, and is divided into radial bearings and thrust bearings according to the main direction of action that the bearings can bear. [0004] At present, the commonly used liquids for bearing quenching include quenching liquid and quenching oil. The general process is: first heat treat the workpiece; , After shaping, the shaped finished product is tempered with the top; after tempering, the top is removed, and the s...
Claims
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IPC IPC(8): C21D9/40C21D1/20C21D11/00
CPCC21D1/20C21D9/40C21D11/005
Inventor 车德礼杜善亮
Owner WAFANGDIAN ZHENGDA METALLURGICAL MILL BEARING