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Surface quenching structure and quenching process of large-diameter cylindrical workpieces

A technology of surface quenching and large diameter, applied in the field of workpiece quenching, can solve the problems of poor hardness uniformity, difficulty in control, and many factors affecting the hardening depth, and achieve the effect of controlling the hardening depth and good hardness uniformity

Inactive Publication Date: 2015-01-28
常州泉汇机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantages are: the uniformity of hardness is affected by the uniformity of heating and spray cooling, the uniformity of hardness is poor, and there are many factors affecting the depth of hardening, which is difficult to control

Method used

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  • Surface quenching structure and quenching process of large-diameter cylindrical workpieces

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Embodiment Construction

[0015] Such as figure 1 As shown, a surface quenching structure of a large-diameter cylindrical workpiece includes a cylindrical workpiece 1, a cover 2, and an insulating material 3. The insulating material 3 fills the interior of the cylindrical workpiece 1, and the cylindrical workpiece 1 The end is closed by a cover 2, and the cover 2 is fixed on the end of the cylindrical workpiece 1 by a mounting mechanism.

[0016] The installation mechanism includes a pull rod 4 and a lock nut 5. The two ends of the pull rod 4 have threads matched with the lock nut 5. The two ends of the pull rod 4 pass through the cover 2 respectively, and the lock nuts 5 are respectively installed on both ends of the pull rod 4. , apply pressure to the cover 2, and fix the cover 2 to the end of the cylindrical workpiece 1 by pressing.

[0017] The thermal insulation material 3 is yellow sand or asbestos.

[0018] A surface quenching process for large-diameter cylindrical workpieces is characterized ...

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Abstract

The invention relates to the technical field of workpiece quenching and particularly to a surface quenching structure and a quenching process of large-diameter cylindrical workpieces. The quenching structure comprises a cylindrical workpiece, a sealing cover and a thermal insulation material, wherein the thermal insulation material is filled in the cylindrical workpiece, and the end part of the cylindrical workpiece is sealed by the sealing cover. The quenching process of the cylindrical workpieces comprises the following steps: a. heating the quenching structure of the cylindrical workpieces to quenching temperature; b. throwing the quenching structure of the cylindrical workpieces into a quenching medium for quenching and cooling; c. annealing. The surface quenching structure and quenching process provided by the invention has the beneficial effects that compared with the existing temperature difference quenching process, the hardening depth which can be achieved by the quenching scheme is larger and can exceed by about 10%, the hardness uniformity is better, and the hardening depth can be accurately controlled by controlling the quenching and cooling times.

Description

technical field [0001] The invention relates to the technical field of workpiece quenching, in particular to a surface quenching structure and a quenching process for large-diameter cylindrical workpieces. Background technique [0002] In order to make the surface of the workpiece have a certain hardness, in the prior art, a differential temperature heat treatment furnace is often used to treat the workpiece with a differential temperature, so that the metal with a certain thickness on the surface of the workpiece is quickly heated to the quenching temperature, and different structures are obtained inside and outside the workpiece after quenching treatment. , the outer working layer reaches a certain hardness, which improves the wear resistance, while the inner layer has a certain toughness. Its disadvantages are: the uniformity of hardness is affected by the uniformity of heating and water spray cooling, the uniformity of hardness is poor, and there are many factors affecti...

Claims

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Application Information

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IPC IPC(8): B32B1/08B32B5/14B32B15/04C21D1/06C21D9/08
CPCB32B1/08B32B5/14B32B15/04C21D1/06C21D9/085
Inventor 刘青峰
Owner 常州泉汇机械制造有限公司
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