Train wheel casting-forging composite forming method

A compound forming and train wheel technology, which is applied in the field of train wheel casting and forging compound forming, can solve the problems of high production cost, large equipment investment, material waste, etc., and achieve the effects of small equipment investment, energy saving, and short process flow

Inactive Publication Date: 2015-05-20
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems of many processes, large investment in equipment, high production cost, waste of materials and serious energy consumption in the existing production method of rolling steel train wheels, and to provide a method for composite forming of train wheels by casting and forging

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for compound forming of train wheel casting and forging, wherein: it includes the steps of alloy smelting, casting train wheel billet, heating, rolling and bending, and the specific steps are as follows:

[0016] 1) Alloy smelting: 60tUHP electric arc furnace is used to heat the metal raw materials to 1655°C for smelting, stop heating after smelting to form molten steel, and the molten steel cools down with the furnace;

[0017] 2) Casting the train wheel billet: when the temperature of the molten steel drops to 1540°C, pour the molten steel into the metal mold, inject cooling water into the wall of the metal mold, and make it rapidly cool to room temperature to obtain the train wheel billet;

[0018] 3) Heating: heating the obtained train wheel slab to an initial rolling temperature of 1050° C. in an annular heating furnace;

[0019] 4) Rolling: place the heated train wheel billet on a seven-roller horizontal rolling mill for rolling, the feed rate of the main...

Embodiment 2

[0023] A method for compound forming of train wheel casting and forging, wherein: it includes the steps of alloy smelting, casting train wheel billet, heating, rolling and bending, and the specific steps are as follows:

[0024] 1) Alloy smelting: 60tUHP electric arc furnace is used to heat the metal raw materials to 1685°C for smelting, stop heating after smelting to form molten steel, and the molten steel cools down with the furnace;

[0025] 2) Casting the train wheel billet: when the temperature of the molten steel drops to 1560°C, pour the molten steel into the metal mold, inject cooling water into the wall of the metal mold, and quickly cool it to room temperature to obtain the train wheel billet;

[0026] 3) Heating: heating the obtained train wheel billet to an initial rolling temperature of 1080° C. in an annular heating furnace;

[0027] 4) Rolling: Place the heated train wheel billet on a seven-roller horizontal rolling mill for rolling. The feed rate of the main ro...

Embodiment 3

[0031] A method for composite casting and forging of train wheels is characterized in that it includes the steps of alloy smelting, casting train wheel billets, heating, rolling and bending, and the specific steps are as follows:

[0032] 1) Alloy smelting: use a 60tUHP electric arc furnace to heat the metal raw materials to 1660°C for smelting, stop heating after smelting to form molten steel, and the molten steel is cooled with the furnace;

[0033] 2) Casting the train wheel billet: when the temperature of the molten steel drops to 1550°C, pour the molten steel into the metal mold, inject cooling water into the wall of the metal mold, and quickly cool it to room temperature to obtain the train wheel billet;

[0034] 3) Heating: heating the obtained train wheel slab to an initial rolling temperature of 1065° C. in a ring heating furnace;

[0035] 4) Rolling: place the heated train wheel billet on a seven-roller horizontal rolling mill for rolling, the feed rate of the main r...

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PUM

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Abstract

A train wheel casting-forging composite forming method aims at solving the technical problems that an existing rolled steel train wheel producing method has many procedures, is large in device investment and high in production cost, wastes materials and is high in energy consumption. The method includes the following steps of conducting alloy smelting, wherein metal raw materials are heated till the temperature ranges from 1655 DEG C to 1685 DEG C to be smelted, and molten steel formed after smelting is cooled in a furnace; casting a train wheel ingot blank, wherein the molten steel is poured into a metal die after the temperature of the molten steel falls to the range of 1540 DEG C to 1560 DEG C, and the train wheel ingot blank is obtained after cooling is conducted; heating the obtained train wheel ingot blank; conducting rolling, wherein the heated train wheel ingot blank is placed on a rolling machine to be rolled, the feed amount of a main roller ranges from 0.5 mm / s to 3.0 mm / s, the pressure ranges from 300 KN to 900 KN, the radial diameter of a hub reaches the diameter of a hot forging part, and the hub, a rim and a step face are formed; conducting bending, wherein after rolling is completed, the temperature falls to the range of 980 DEG C to 1000 DEG C, and hot bending forming is conducted on a train wheel disk through a bending machine. The method has the advantages of being short in technological process, simple in procedure, small in device investment, high in raw material utilization rate and capable of saving energy.

Description

technical field [0001] The invention belongs to the field of forming and processing of train wheels, and in particular relates to a method for compound forming of train wheels by casting and forging. Background technique [0002] Existing train wheel mainly is to be divided into cast steel wheel and rolled steel wheel. The carbon content of the material for cast steel wheels is high, and the production process of cast steel wheels is smelting-graphite casting-heat treatment-machining; the process is simple, the dimensional accuracy is high, and energy consumption is reduced, but the produced wheels have low plasticity and toughness. Poor, unable to meet the requirements of railways for high-speed wheels and heavy-duty wheels. The materials used for rolling steel wheels have reduced carbon content and are alloyed with vanadium. The production process is smelting-continuous casting round billet-heating-upsetting-pre- Forming-punching-rolling-bending. The train wheels produced...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 李永堂秦芳诚付建华
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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