Technology for performing hot processing on plunger sleeve GCr15 bearing steel raw materials

A technology of bearing steel and raw materials, applied in the field of thermal processing of bearing steel, can solve problems such as large flow stress, difficult thermal processing, and large deformation resistance

Inactive Publication Date: 2012-03-14
仪征威业油泵油嘴有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the general GCr15 bearing steel has low plasticity at room temperature, low deformation limit, large deformation resistance, and easy cracking when cold deformation. Therefore, most GCr15 bearing steels must be deformed at h

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A plunger sleeve GCr15 bearing steel raw material thermal processing process, comprising the following steps:

[0012] 1) Feed the raw material of plunger sleeve G Cr15 bearing steel into the heating furnace. During the feeding process, it must be fed and heated in turn according to the position of each heating tube, heated to 670 ° C, and kept for 1.5 hours.

[0013] 2) Put the warm heading forming mold into the punching machine. During the warm heading forming, cool the plunger sleeve G Cr15 bearing steel raw material with stone cooling water to facilitate demoulding and improve the durability of the mold core.

[0014] 3) After tempering, first heat the empty tempering furnace to 640°C, keep it warm for 3.5 hours, then open the furnace cover, put in the warmed workpiece, cover the furnace cover tightly, raise the temperature in the furnace to 640°C, and again After 8 hours of heat preservation, the furnace cover was opened for air cooling.

[0015] 4) Analysis of th...

Embodiment 2

[0017] A plunger sleeve GCr15 bearing steel raw material thermal processing process, comprising the following steps:

[0018] 1) Feed the raw material of plunger sleeve G Cr15 bearing steel into the heating furnace. During the feeding process, it must be fed and heated in turn according to the position of each heating tube, heated to 680 ° C, and kept for 1.8 hours.

[0019] 2) Put the warm heading forming mold into the punching machine. During the warm heading forming, cool the plunger sleeve G Cr15 bearing steel raw material with stone cooling water to facilitate demoulding and improve the durability of the mold core.

[0020] 3) After tempering, first heat the empty tempering furnace to 650°C, keep it warm for 3.8 hours, then open the furnace cover, put in the warmed workpiece, cover the furnace cover tightly, raise the temperature in the furnace to 650°C, and again After 9 hours of heat preservation, the furnace cover was opened for air cooling.

[0021] 4) Analysis of th...

Embodiment 3

[0023] A plunger sleeve GCr15 bearing steel raw material thermal processing process, comprising the following steps:

[0024] 1) Feed the raw material of the plunger sleeve G Cr15 bearing steel into the heating furnace. During the feeding process, the materials must be fed and heated sequentially according to the position of each heating tube, heated to 690°C and kept for 2 hours.

[0025] 2) Put the warm heading forming mold into the punching machine. During the warm heading forming, cool the plunger sleeve G Cr15 bearing steel raw material with stone cooling water to facilitate demoulding and improve the durability of the mold core.

[0026] 3) After tempering, first heat the empty tempering furnace to 660°C, keep it warm for 4 hours, then open the furnace cover, put in the warmed workpiece, cover the furnace cover tightly, raise the temperature in the furnace to 660°C, and again After 10 hours of heat preservation, the furnace cover was opened for air cooling.

[0027] 4) ...

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PUM

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Abstract

The invention relates to a technology for performing hot processing on plunger sleeve GCr15 bearing steel raw materials. The technology comprises the following steps of: 1) feeding the plunger sleeve GCr15 bearing steel raw materials into a heating furnace; 2) filling a hot forging and forming mould into a punching machine and performing hot forging and forming; 3) tempering; and 4) analyzing the hardness and metallographic structure of the plunger sleeve GCr15 bearing steel. The aim of improving the technology for performing hot processing on the plunger sleeve GCr15 bearing steel is fulfilled by reducing the relative temperature and the internal metallographic structure of the plunger sleeve GCr15 bearing steel raw materials, so that the defects and difficulty which are caused during the hot processing of a plunger sleeve GCr15 bearing steel workpiece can be avoided, production cost is low, the technology is easy to realize, the pollution to environment is reduced, damage to a hot forging module is reduced, and any adverse influence on the shape and performance of the plunger sleeve GCr15 bearing steel workpiece is avoided, and the hardness of the plunger sleeve GCr15 bearing steel after tempering is HB170-207.

Description

technical field [0001] The invention relates to the technical field of thermal processing of bearing steel, in particular to a thermal processing process of a plunger sleeve GCr15 bearing steel raw material. Background technique [0002] GCr15 bearing steel materials are mainly used for ferrules, rolling elements and various engine, gas and hydraulic machine parts, followed by structural parts of rockets and missile high-speed trains. Since the 1960s, GCr15 bearing steel has been used in general industrial products, used to make bearings on engines such as automobiles and tractors; spindle bearings for machine tools, motors, mining machinery, electric locomotives, ventilation machinery, etc.; Bearings and many other fields are widely used. However, general GCr15 bearing steel has low plasticity at room temperature, low deformation limit, high deformation resistance, and easy cracking due to cold deformation. Therefore, most GCr15 bearing steels must be deformed at high temp...

Claims

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Application Information

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IPC IPC(8): B21J5/00B21J1/06C21D1/00
Inventor 朱怀东
Owner 仪征威业油泵油嘴有限公司
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