Method for manufacturing seamless ring and special heat treatment system thereof

A heat treatment system and manufacturing method technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve problems such as the inability to meet the quality requirements of large seamless rings, avoid inconsistent quality performance, ensure uniform rotation, and eliminate external and internal Inconsistent effect of hardness

Active Publication Date: 2010-09-15
CHANGZHOU SHUANGQIANG MASCH MFG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the steps of the quenching process disclosed in the Chinese patent document 101275179A "Heat Treatment Process for Automobile Drive Axle Housing" are: put the workpiece into the heat treatment furnace, heat it to 900 ± 10°, and keep it warm for 4 hours; then take the workpiece out and put it into quenching pool, the quenching temperature is 900±10°, the quenching medium is 5-10% NaCl brine, the temperature of the quenching medium is ≤40°, and the cooling time is ≥10min before the water comes out. Metal workpieces manufactured by this conventional process cannot achieve the aforementioned large seamless Ring quality requirements

Method used

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  • Method for manufacturing seamless ring and special heat treatment system thereof
  • Method for manufacturing seamless ring and special heat treatment system thereof
  • Method for manufacturing seamless ring and special heat treatment system thereof

Examples

Experimental program
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Embodiment 1

[0049] (Embodiment 1, manufacturing method of seamless ring)

[0050] See figure 1 , the manufacturing method of the seamless ring in this embodiment includes four continuous processes of ring rolling, gold processing, heat treatment and finishing. The main materials for manufacturing seamless rings are 42CrMo and 16Mn,

[0051] The first process - ring rolling: first of all, the material inspection and testing are carried out. Calculate the volume of the material according to the size of the product to be produced. After sawing the material, put it into the furnace for heating, and then use a 2,000-ton hydraulic press and a 5-ton electro-hydraulic hammer to punch the blank. The blank is clamped on the working table of the automatic ring rolling machine by a manipulator and a rail car, and the completion is complete. The rolling process of seamless rings that meets the requirements of product drawings.

[0052] The second process - metal processing: the rolled seamless ring...

Embodiment 2

[0059] (Example 2, special heat treatment system for the seamless ring manufacturing method)

[0060] See Figure 2 to Figure 8 , the special heat treatment system in the seamless ring manufacturing method in Example 1 includes split orbital furnaces 1-1, 1-2, cooling cycle mechanism 2, quenching pool 3, filtering pool 4, tempering pool 5 and equipment Liquid pool6.

[0061] See image 3 The cooling cycle mechanism 2 includes a cooling tower 21, a cooling water pool 22 located below the cooling tower 21, two circulating pumps 23, a heat exchanger 24, a pipeline 25, an electronic descaler 26, two iron oxide chips filters 27, A plurality of pipeline control valves 28 and an electric control cabinet 29. The pipeline 25 of the cooling cycle mechanism 2 includes 2 road cold water pipelines 25-1 and 2 road hot water pipelines 25-2, and 1 road cold water pipeline 25-1 communicates with the cooling water pool 22, the heat exchanger 24 and the pool body 31. The cold water inlet 31-...

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Abstract

The invention discloses a method for manufacturing a seamless ring and a special heat treatment system thereof. The manufacturing method comprises four continuous flows of ring rolling, metal working, heat treatment and finish machining, wherein the heat treatment flow comprises three processes of heating, quenching and tempering. The quenching process of the heat treatment flow comprises the steps of: (1) opening a vortex generator which is positioned at the bottom of a quenching tank, wherein the quenching liquid in the quenching tank forms stable vortex; and (2) lifting the seamless ring out of a split track furnace and putting the seamless ring into the quenching tank for quenching. In the method for manufacturing the seamless ring and the special heat treatment system, the vortex generator is opened first before the seamless ring is quenched, and when stable vortex which moves at a constant speed is formed in the quenching tank, a heated workpiece is put into the quenching tank, so that inconsistent quality performance of the seamless ring due to the inconsistency of the concentration and temperature of the quenching liquid is avoided. Therefore, the consistency of the surface hardness and core hardness of the seamless ring and the consistency of the overall hardness can be guaranteed.

Description

technical field [0001] The invention relates to a manufacturing method of a metal workpiece and its special heat treatment system, in particular to a manufacturing method of a large seamless ring piece and its special heat treatment system. Background technique [0002] The main material of the seamless ring is 42CrMo and 16Mn steel, etc. The large seamless ring products are mainly used in large-scale machinery manufacturing, such as gear rings, rotary Support manufacturing is a key workpiece in the manufacture of large equipment. Moreover, the current international and domestic emerging technology projects——the manufacture of large and giant slewing bearings that are indispensable in pollution-free wind turbine bases, seamless rings are the only choice. my country's original ring parts are generally imported from abroad because there is no domestic equipment and technology, which is expensive and cannot meet the market demand of equipment companies. [0003] Because large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/40C21D1/18C21D1/34C21D1/63
Inventor 孙自强孙志强
Owner CHANGZHOU SHUANGQIANG MASCH MFG CO LTD
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