Quenching cooling method for bainite steel frog point rail

A technology of bainitic steel and a cooling method, which is applied in the field of quenching and cooling of bainitic steel frog core rails, can solve the problems of inability to industrialize, large-scale deformation prevention, single quick cooling adjustment method, and small adjustment range, etc. The effect of uniform performance index, small deformation and stable process

Active Publication Date: 2021-12-07
CHINA RAILWAY BAOJI BRIDGE GRP
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the present invention is to provide a method for quenching and cooling the bainite steel frog core rail, which adopts the cooling method of any combination of air cooling, spraying, and non-contact water cooling and heat exchange, which can be reversed up and down

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Quenching cooling method for bainite steel frog point rail
  • Quenching cooling method for bainite steel frog point rail
  • Quenching cooling method for bainite steel frog point rail

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0050] Example 1:

[0051] The method for quenching and cooling a bainitic steel frog core rail comprises the following steps:

[0052] S001, the furnace door 6 of the quenching and quick-cooling chamber is opened; the reclaimer places the core rails that need quick-cooling before being placed at a fixed distance on the support 2; the furnace door 6 of the quenching and quick-cooling chamber is closed.

[0053] S002, manually click the start button, and the quenching quick-cooling chamber starts to execute the quick-cooling procedure.

[0054] S003. In the high-temperature cooling stage of 920-650°C in the quick-cooling procedure, in the quenching and quick-cooling chamber, the air-cooling device 3 with the reversing function and the partition function and the non-contact water-cooling heat exchange device 5 are combined to carry out the operation on the frog core rail. Cool down.

[0055] In step S003, further: the rotational speed of the centrifugal fan 31 used by the air ...

Example Embodiment

[0069] Example 2:

[0070] The method for quenching and cooling a bainitic steel frog core rail comprises the following steps:

[0071] S001, the furnace door 6 of the quenching and quick-cooling chamber is opened; the reclaimer places the core rails that need quick-cooling before being placed at a fixed distance on the support 2; the furnace door 6 of the quenching and quick-cooling chamber is closed.

[0072] S002, manually click the start button, and the quenching quick-cooling chamber starts to execute the quick-cooling procedure.

[0073] S003. In the high-temperature cooling stage of 920-650°C in the quick-cooling procedure, in the quenching and quick-cooling chamber, the air-cooling device 3 with the reversing function and the partition function and the non-contact water-cooling heat exchange device 5 are combined to carry out the operation on the frog core rail. Cool down.

[0074] In step S003, further: the rotational speed of the centrifugal fan 31 used by the air ...

Example Embodiment

[0081] Example 3:

[0082] The method for quenching and cooling a bainitic steel frog core rail comprises the following steps:

[0083] S001, the furnace door 6 of the quenching and quick-cooling chamber is opened; the reclaimer places the core rails that need quick-cooling before being placed at a fixed distance on the support 2; the furnace door 6 of the quenching and quick-cooling chamber is closed.

[0084] S002, manually click the start button, and the quenching quick-cooling chamber starts to execute the quick-cooling procedure.

[0085] S003. In the high-temperature cooling stage of 920-650°C in the quick-cooling procedure, in the quenching and quick-cooling chamber, the air-cooling device 3 with the reversing function and the partition function and the non-contact water-cooling heat exchange device 5 are combined to carry out the operation on the frog core rail. Cool down.

[0086] In step S003, further: the rotational speed of the centrifugal fan 31 used by the air ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a quenching cooling method for a bainite steel frog point rail. The quenching cooling method comprises the following steps that a furnace door of a quenching rapid cooling chamber is opened; a point rail with the fixed distance is put by a material taking machine on a support and the furnace door is closed; a quick cooling program is started to execute; in the 920-650 DEG C high-temperature stage, air cooling and non-contact water cooling heat exchange are combined for cooling; in the medium temperature stage of 650-450 DEG C, air cooling and spray cooling are combined for cooling; and in the low-temperature stage of 450-200 DEG C, an air cooling device is independently used for conducting up-down reversing cooling. After the rapid cooling is finished, the quenching rapid cooling chamber automatically stops. According to the quenching cooling method for the bainite steel frog point rail, a cooling mode of any combination of air cooling, spraying and non-contact water cooling heat exchange is adopted, industrialized and large-scale quenching cooling production of a railway frog point rail is realized, and the quenching cooling method for the bainite steel frog point rail has the advantages of deformation prevention, high efficiency, higher economy and practicability, and stable and reliable quenching quality.

Description

technical field [0001] The invention belongs to the technical field of quenching and heat treatment of metal materials by chemical metallurgy, and in particular relates to a method for quenching and cooling bainitic steel frog core rails. Background technique [0002] Because of its excellent strength and toughness, bainitic steel has been widely used in applications requiring high strength, high hardness and high toughness, such as locomotive bearings and frog core rails. Since bainite belongs to a transitional structure between pearlite and martensite, the requirements for controlling the transformation temperature in the quenching process are very strict. Conventional methods such as water quenching, oil quenching, and liquid medium quenching are very difficult in actual production. It is difficult to guarantee the consistency of product quality. [0003] Predecessors have concluded through a large number of experimental studies that the best heat treatment process for b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C21D1/18C21D1/667C21D9/00C21D11/00C21D6/00C22C38/02C22C38/04C22C38/34C22C38/44C22C38/58
CPCC21D1/18C21D9/0068C21D11/005C21D1/667C21D6/004C21D6/005C21D6/008C22C38/02C22C38/04C22C38/44C22C38/34C22C38/58C21D2211/002
Inventor 高尚君任伟伟王磊付涛郑会锋王贵雨
Owner CHINA RAILWAY BAOJI BRIDGE GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap