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A kind of mo-ti alloy wear-resistant medium manganese steel and preparation method thereof

A mo-ti and alloy technology, applied in the field of medium manganese steel, can solve the problems of large decrease in toughness, reduced service life, application restrictions, etc., and achieve the effects of excellent mechanical properties, improved wear resistance, and increased number of precipitates

Active Publication Date: 2021-11-23
山东华星新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the reduction of manganese content, the work hardening ability of medium manganese wear-resistant steel can be improved. Although the wear resistance is improved, its toughness will be greatly reduced, and fractures often occur, which reduces its life expectancy and limits its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: A Mo-Ti alloy wear-resistant manganese steel and preparation method

[0024] The method comprises sequentially preparing melting, forging, hot rolling, annealing; the following steps:

[0025] (1) Melting: vacuum induction melting, casting to obtain ingots; chemical composition of the steel ingot in mass percentage C: 0.21%, Mn: 6.0%, Al: 0.07%, Si: 0.05%, Ti: 0.05%, Mo: 0.10 %, the balance being Fe and unavoidable impurities.

[0026] (2) forging: The ingots were heated to 1200 ℃, incubated 2h, forged to-sectional dimension of 40mm × 230mm slab;

[0027] (3) hot-rolling: slabs placed in a high temperature furnace was heated from room temperature to 1200 deg.] C, incubated 2h, start rolling temperature 1100 ℃, finishing temperature 830 ℃, 7 passes through the hot rolling, hot rolled to a thickness of 5mm sheet, then cooled to room temperature;

[0028] (4) heat treatment after hot rolling: the hot-rolled sheet annealing temperature of 630 ℃, 8h after incubation i...

Embodiment 2

[0030] Example 2: one kind of Mo-Ti alloy wear-resistant manganese steel and preparation method

[0031] The method comprises sequentially preparing melting, forging, hot rolling, annealing; the following steps:

[0032] (1) Melting: vacuum induction melting, casting to obtain ingots; chemical composition of the steel ingot in mass percentage C: 0.23%, Mn: 8.0%, Al: 0.07%, Si: 0.06%, Ti: 0.1%, Mo: 0.20 %, the balance being Fe and unavoidable impurities.

[0033] (2) forging: The ingots were heated to 1200 ℃, incubated 2h, forged to-sectional dimension of 40mm × 230mm slab;

[0034] (3) hot-rolling: slabs placed in a high temperature furnace was heated from room temperature to 1200 deg.] C, incubated 2h, start rolling temperature 1150 ℃, finishing temperature 850 ℃, 7 passes through the hot rolling, hot rolled to a thickness of 5mm sheet, then cooled to room temperature;

[0035] (4) heat treatment after hot rolling: the hot-rolled sheet annealing temperature of 650 ℃, after 5h inc...

Embodiment 3

[0037] Example 3: one kind of Mo-Ti alloy wear-resistant manganese steel and preparation method

[0038] The method comprises sequentially preparing melting, forging, hot rolling, annealing; the following steps:

[0039] (1) Melting: vacuum induction melting, casting to obtain ingots; chemical composition of the steel ingot in mass percentage C: 0.85%, Mn: 9.0%, Al: 0.03%, Si: 0.02%, Ti: 0.9%, Mo: 0.05 %, the balance being Fe and unavoidable impurities.

[0040] (2) forging: The ingots were heated to 1200 ℃, incubated 2h, forged to-sectional dimension of 40mm × 230mm slab;

[0041] (3) hot-rolling: slabs placed in a high temperature furnace was heated from room temperature to 1200 deg.] C, incubated 2h, 1130. deg.] C start rolling temperature, final rolling temperature 890 deg.] C, 5 through the hot rolling, the hot rolled to a thickness of 12mm sheet, then cooled to room temperature;

[0042] (4) heat treatment after hot rolling: the hot-rolled sheet annealing temperature of 680 ...

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Abstract

The invention relates to a wear-resistant medium manganese steel of Mo-Ti alloy and a preparation method thereof. The preparation method includes melting, adopting vacuum induction melting; forging: heating the steel ingot to 1200°C, keeping it warm for 2 hours, and forging it into a slab; hot rolling: Put the slab into a high-temperature furnace and heat it from room temperature to 1200°C, keep it warm for 2 hours, start rolling at 1100-1150°C, finish rolling at 830-900°C, go through 5-7 passes of hot rolling, hot-roll into a thin plate, and then air-cool to room temperature; heat treatment after hot-rolling: the annealing temperature of the hot-rolled sheet is 600-700°C, and after being kept in a heating furnace for 1-10 hours, it is rapidly water-cooled to room temperature. The wear-resistant medium manganese steel prepared by the invention has high tensile strength, good plasticity and excellent wear resistance, its tensile strength is 750-1200MPa, yield strength is 560-900MPa, and total elongation is 20%-40 %.

Description

Technical field [0001] Manganese steel in the present invention belongs to the technical field, particularly it relates to a Mo-Ti alloy wear-resistant manganese steel and its preparation method. Background technique [0002] High wear-resistant manganese carbon steel or an impact load is large, the contact stress, rapid work hardening its surface, resulting in high wear-resistant surface layer and the inner layer austenite remained good toughness. This feature of high-manganese carbon steel wear it for a long time are widely used in metallurgy, mining, railroad, electric power, coal and other machinery. [0003] In recent years, due to difficulties in machining high manganese steel, in the low, medium impact wear hardening capacity under low stress conditions play so insufficient wear resistance, the production cost is high. People began to develop wear-resistant low-alloy steel, wear-resistant manganese steel. Since the wear-resistant manganese steel manganese content decreases...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C21D8/02C21D1/26
CPCC21D1/26C21D8/0226C21D2211/001C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 付彬
Owner 山东华星新材料科技有限公司