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A Heat Treatment Process for Vanadium-Titanium High-Speed ​​Train Axle

A high-speed train, vanadium-titanium technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problem of high cost, and achieve the effect of improving hardenability, improving overall performance, and simple production process

Active Publication Date: 2016-09-14
MAGANG (GROUP) HOLDING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some European high-speed axle materials use high-alloy structural steel such as 30NiCrMoV12, which contains Cr0.60~1.00%, Ni2.70~3.30%, Mo0.40~0.60%, V0.08~0.13%, and there are many types of steel Advantages such as good hardenability, oil quenching, small deformation, high hardness, high yield ratio, good corrosion resistance, etc., but the cost is relatively high

Method used

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  • A Heat Treatment Process for Vanadium-Titanium High-Speed ​​Train Axle
  • A Heat Treatment Process for Vanadium-Titanium High-Speed ​​Train Axle
  • A Heat Treatment Process for Vanadium-Titanium High-Speed ​​Train Axle

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Embodiment Construction

[0028] The following examples are used to illustrate the present invention, but the protection scope of the present invention is not limited to the following examples.

[0029] The production process of the vanadium-containing titanium high-speed train axle steel of the present invention is as follows: electric arc furnace or converter smelting→LF furnace refining→RH or VD vacuum degassing→continuous casting→slab heating furnace heating→axle blank rolling→axle blank forging→ Rough turning of the rough axle → processing of the full end face of the axle → normalizing + quenching + high temperature tempering heat treatment → finishing turning of the outer circle of the axle → boring of the inner hole of the axle → cylindrical grinding → flaw detection.

[0030] Embodiments of the smelting chemical composition, main heat treatment process parameters and performance of vanadium-containing titanium high-speed train axle steel of the present invention are as follows:

[0031] The hea...

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Abstract

The invention provides a heat treatment process for vanadium-titanium high-speed train axles. The chemical composition mass percentage (wt%) of the vanadium-titanium high-speed train axles is: 0.25-0.32, Si: 0.15-0.40, Mn: 0.60-0.90, P: ≤0.015, S: ≤0.010, Cr: 1.00~1.20, Mo: 0.20~0.35, Ni: 0.15~0.30, V: 0.02~0.06, Ti: 0.010~0.030, Cu: 0.10~0.30, B: 0.0008~ 0.0050, Als: 0.010~0.050; the heat treatment process of the vanadium-containing titanium high-speed train axle is: (1) normalizing at 880~930°C; (2) quenching at 860~910°C; (3) tempering at 620~680°C.

Description

technical field [0001] The invention belongs to the field of axle steel, in particular to the technical field of alloy structural steel for high-speed train axles and heat treatment technology thereof. Background technique [0002] The axle is the key part of the vehicle's walking part. It bears the self-weight and load of the vehicle. It also bears the impact force and braking force when the vehicle is running and parking. The force situation is more complicated under high-speed and heavy-load conditions. It is a key component of railway construction. One of the three key parts (heavy rails, axles and wheels), the train axle is a super-large axisymmetric stepped shaft part with a maximum diameter of about 200mm and a length of about 2200mm. [0003] With the operation of high-speed railways in my country, the speed of trains has further increased. As one of the key components of railway trains, high-speed axles are important running components of railway trains, and their q...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/54C21D9/28C21D1/18C21D1/28
Inventor 杜松林苏世怀汪开忠孙维于文坛许兴谢世红
Owner MAGANG (GROUP) HOLDING CO LTD