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Alloyed high manganese steel frog and its manufacturing process

A manufacturing process, high manganese steel technology, applied in the field of high manganese steel frog preparation, can solve the problems of insignificance and achieve the effects of increasing service life, reducing crack growth rate and improving toughness

Active Publication Date: 2021-06-08
CHINA RAILWAY BAOJI BRIDGE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, the effect of refining austenite grains to improve strength by relying on V and Ti is not significant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The embodiment of the present invention provides a manufacturing process of a 60-12ZH alloyed high manganese steel frog. The chemical composition (wt%) of the obtained 60-12ZH alloyed high manganese steel frog is: C: 1.11, Mn: 13.08, Cr: 0.46, Mo: 0.43, V: 0.18, Si: 0.58, Ni: 0.005, Re: 0.001, Mg: 0.002, P: 0.026, S: 0.015, and the rest is Fe.

[0028] Specifically include the following steps:

[0029] Step 1: Smelting molten steel: add scrap iron to the electric arc furnace for smelting, add Mo iron in the oxidation period, add Mn iron, Cr iron, V iron, industrial pure Ni, etc. in the late reduction period, add rare earth before tapping, and The content of each component is regulated.

[0030] Cr and Mo have the effect of solid solution strengthening, and Ni can stabilize austenite and reduce the network structure; these three elements are all helpful to improve the stability of austenite, and can inhibit the formation of network carbide in the subsequent water toughe...

Embodiment 2

[0043] The embodiment of the present invention provides a manufacturing process of a 60-12ZH alloyed high manganese steel frog, and the chemical composition (wt%) of the obtained 60-12ZH alloyed high manganese steel frog is: C: 1.13, Mn: 12.9, Cr: 0.55, Mo: 0.35, V: 0.22, Si: 0.40, Ni: 0.002, Re: 0.004, Mg: 0.002, P: 0.035, S: 0.009, and the rest is Fe.

[0044] Specifically include the following steps:

[0045]Step 1: Smelting molten steel: add scrap iron to the electric arc furnace for smelting, add Mo iron in the oxidation period, add Mn iron, Cr iron, V iron, industrial pure Ni, etc. in the late reduction period, add rare earth before tapping, and The content of each component is regulated.

[0046] Step 2: Control the temperature of the molten steel after the component inspection before the molten steel furnace is qualified, and perform casting to obtain a formed 60-12ZH alloyed high manganese steel frog. The tapping temperature is 1540°C, and the pouring temperature is ...

Embodiment 3

[0057] The embodiment of the present invention provides a manufacturing process of a 60-12ZH alloyed high manganese steel frog, and the chemical composition (wt%) of the obtained 60-12ZH alloyed high manganese steel frog is: C: 1.26, Mn: 12.8, Cr: 0.75, Mo: 0.65, V: 0.30, Si: 0.62, Ni: 1.3, Re: 0.03, Mg: 0.002, P: 0.033, S: 0.009, and the rest is Fe.

[0058] Specifically include the following steps:

[0059] Step 1: Smelting molten steel: add scrap iron to the electric arc furnace for smelting, add Mo iron in the oxidation period, add Mn iron, Cr iron, V iron, industrial pure Ni, etc. in the late reduction period, add rare earth before tapping, and The content of each component is regulated.

[0060] Step 2: Control the temperature of the molten steel after the component inspection before the molten steel furnace is qualified, and carry out casting to obtain a molded 60-12ZH casting alloyed high manganese steel frog. The tapping temperature is 1560°C, and the pouring tempera...

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Abstract

The invention discloses an alloyed high manganese steel frog and its manufacturing process. The chemical composition (wt%) of the frog is: C: 0.95-1.35, Mn: 11.0-14.0, Cr: 0.2-1.0, Mo: 0.2~1.2, V: 0.05~0.35, Si: 0.3~0.8, Ni: 0.002~1.5, Re: 0.001~0.05, Mg: 0.001~0.005, P:≦0.045, S:≦0.03, and the rest is Fe. The alloyed high manganese steel frog prepared by the invention has a grain size 1-2 grades smaller than that of common high manganese steel frogs, which can improve the toughness of the high manganese steel frogs, reduce the crack growth rate and increase the service life.

Description

technical field [0001] The invention belongs to the technical field of high manganese steel frog preparation, and in particular relates to an alloyed high manganese steel frog and a manufacturing process thereof. Background technique [0002] ZGMn13 has been widely used in the technical field of railway frogs, but with the development of modern high-speed and heavy-duty railways, traditional high-manganese steel frogs can no longer meet the actual use requirements. Using alloying to improve the mechanical properties of high manganese steel frogs to increase the service life of frogs is an important direction for the development of high manganese steel for railway frogs. For example, the United States invented a Ni, V , Ti micro-alloyed high-manganese steel, which significantly improves the service life of frogs. The composition (wt%) of this microalloyed high manganese steel is: Mn11.0-24.0, C1.0-1.4, Si≥1, Cr≥1.9, Ni≥0.25, Mo≥1.0, Al≥0.2, Cu≥ 0.25, impurity P≤0.07, S≤0.06...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/44C22C38/46C22C38/58E01B7/10C21D9/00C21D6/00
CPCC21D6/004C21D6/005C21D6/008C21D9/0068C21D2211/001C21D2211/004C22C38/002C22C38/005C22C38/02C22C38/44C22C38/46C22C38/58E01B7/10Y02P10/20
Inventor 严则会李文博邱昌昌孙俊杰闫旭辉
Owner CHINA RAILWAY BAOJI BRIDGE GRP
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