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Production method for forging axle for railway vehicle by adopting continuous casting billet

The technology of a railway vehicle and a production method, which is applied in the field of preparation of axles for railway vehicles, can solve the problems of low production efficiency, long production cycle, restricted production capacity, etc., and achieves the effects of high molding dimensional accuracy, simplified production process and high efficiency.

Active Publication Date: 2021-06-08
建龙北满特殊钢有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]At present, the most commonly used and the largest amount of steel for railway vehicle axles in China is LZ50, and the current production process generally uses continuous casting slabs to roll them into axles of corresponding specifications Axle, the axle production plant turns the rolled axle blank into a rough axle of qualified size through "sawing and segmentation-heating-fast forging machine forging", and can only produce one rough axle at a time, so the production efficiency is low and the production The cycle is long, which seriously restricts the production capacity

Method used

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  • Production method for forging axle for railway vehicle by adopting continuous casting billet
  • Production method for forging axle for railway vehicle by adopting continuous casting billet
  • Production method for forging axle for railway vehicle by adopting continuous casting billet

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specific Embodiment approach 1

[0034] A production method for forging a railway vehicle axle by using a continuous casting slab, comprising the following steps:

[0035] Step 1. Select the LZ50 continuous casting round billet with a diameter of 650mm, place it in a heating furnace for heating, the heating temperature is 1220°C, the holding time is 6h, and it is ready for use;

[0036] Step 2. After the LZ50 continuous casting round billet processed in step 1 is out of the furnace, use a fast forging machine to carry out 4 passes of forging. The forging temperature is 850-900°C, and the diameter of the forged continuous casting round billet is 350mm, which is ready for use;

[0037] Step 3. Transfer the continuous casting round billet forged by the fast forging machine in step 2 to the radial forging machine, set the forging parameters of the radial forging machine according to the forged axle size parameters and input the forging parameters into the radial forging machine control system, and the radial forg...

specific Embodiment approach 2

[0054] A production method for forging a railway vehicle axle by using a continuous casting slab, comprising the following steps:

[0055] Step 1. Select the LZ50 continuous casting round billet with a diameter of 550mm, place it in a heating furnace for heating, the heating temperature is 1225°C and the holding time is 5h, and it is ready for use;

[0056] Step 2. After the LZ50 continuous casting round billet processed in step 1 is out of the furnace, use a fast forging machine for 4 times of forging. The initial pass is forged with a reduction of ≤20mm, and the subsequent pass is forged with a reduction of 120-150mm, and the final forging is controlled. The temperature is 895°C, the diameter of the forged continuous casting round billet is 355mm, and it is ready for use;

[0057] Step 3. Transfer the billet forged by the fast forging machine in step 2 to the radial forging machine, set the forging parameters of the radial forging machine according to the forged axle size pa...

specific Embodiment approach 3

[0076] A production method for forging a railway vehicle axle by using a continuous casting slab, comprising the following steps:

[0077] Step 1. Select the LZ50 continuous casting round billet with a diameter of 500-650mm, place it in a heating furnace for heating, the heating temperature is 1200-1230°C, the holding time is 5-8h, and it is ready for use;

[0078] Step 2. After the LZ50 continuous casting round billet treated in step 1 is out of the furnace, use a fast forging machine for 5 times of forging. The initial pass is forged with a reduction of ≤20mm, and the subsequent pass is forged with a reduction of 120-150mm, and the final forging is controlled. The temperature is 850-900°C, and the diameter of the forged continuous casting round billet is 350-380mm, which is ready for use;

[0079] Step 3. Transfer the continuous casting round billet forged by the quick forging machine in step 2 to the radial forging machine, set the forging parameters of the radial forging m...

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Abstract

The invention discloses a production method for forging an axle for a railway vehicle by adopting a continuous casting billet, and belongs to the field of preparation methods of axles for railway vehicles. According to the novel technological process of the axle for the railway vehicle, a plurality of blank axles can be efficiently produced at a time. According to the method, an LZ50 continuous casting round billet is placed in a heating furnace to be heated and then subjected to 4-5-pass forging cogging through a high-speed forging machine, at the initial pass, forging with the rolling reduction smaller than or equal to 20 mm is adopted, it is guaranteed that the rolling reduction of two passes is 120-150 mm subsequently, the final forging temperature is controlled to be 850-900 DEG C, the diameter of the billet subjected to forging cogging is 345-360 mm, then the billet is transferred to a radial forging machine, small-rolling-reduction multi-pass forging is adopted in the forging process of the radial forging machine, a connected blank axle with the qualified size is obtained, and a single blank axle for the railway vehicle is obtained after saw cutting and segmentation. The method has the characteristics of being short in production process, high in forming size precision and high in production efficiency.

Description

technical field [0001] The invention belongs to the field of preparation methods of axles for railway vehicles; in particular, it relates to a production method for forging axles for railway vehicles by adopting continuous casting slabs. Background technique [0002] Axle is a key component in the operation of railway vehicles. During operation, it is subjected to multiple complex stresses such as rotation, bending and impact. Therefore, there are strict requirements on the mechanical properties of axles, and its quality is directly related to the transportation safety of railway vehicles. [0003] At present, the most commonly used and the largest amount of steel for railway vehicle axles in China is LZ50. The current production process generally uses continuous casting slabs to roll them into axle blanks of corresponding specifications. Subsection-heating-fast forging machine "forging" becomes a rough axle with qualified dimensions, and only one rough axle can be produced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/06B21J5/00C21D9/28C21D1/28
CPCB21K1/06B21J5/002C21D9/28C21D1/28Y02T10/86
Inventor 孙鸿鹏付宪强陈列董贵文刘光辉王瑞金博鑫牛震
Owner 建龙北满特殊钢有限责任公司
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