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Steel for high-strength, high-toughness and high-wear-resistance steel ball and preparing method of steel

A technology of wear-resistant steel and high toughness, which is applied in the field of steel for wear-resistant steel balls to achieve the effects of improving impact toughness, hardenability, and core hardness

Active Publication Date: 2020-02-28
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, grinding balls of various materials have been developed at home and abroad, but none of them can handle the two major contradictions of grinding balls well, that is, the contradiction between toughness and hardness, the contradiction between alloy element content and hardenability

Method used

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  • Steel for high-strength, high-toughness and high-wear-resistance steel ball and preparing method of steel
  • Steel for high-strength, high-toughness and high-wear-resistance steel ball and preparing method of steel
  • Steel for high-strength, high-toughness and high-wear-resistance steel ball and preparing method of steel

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preparation example Construction

[0049] The present application also provides a method for preparing steel for high-strength, toughness and high wear-resistant steel balls, comprising the following steps:

[0050] Step S1, smelting molten steel, and then casting to obtain ingots;

[0051] Specifically, step S1 includes: loading scrap steel, pig iron, ferrochromium, ferromolybdenum, and nickel blocks into an induction melting furnace, and after the molten steel is dissolved, add ferrosilicon, ferromanganese, aluminum blocks, and copper in sequence through a secondary feeding device. Blocks and ferrovanadium are vacuum smelted, the maximum temperature of molten steel rises to 1550-1620°C, and then casting is carried out after the temperature drops to 1420-1450°C, and air-cooled to room temperature; an ingot is obtained, and the diameter of the ingot is 70-90mm.

[0052] Step S2, forging an ingot to obtain a billet;

[0053] Specifically, step S2 includes: heating the ingot obtained in step S1 to 1100-1150°C, h...

Embodiment 1

[0071] The chemical composition of the steel of this embodiment is shown in Table 1, and the preparation method comprises the steps:

[0072] Step S1, put steel scrap, pig iron, ferrochrome, and nickel into the induction melting furnace according to the distribution ratio of the alloy components, and after the molten steel is dissolved, add ferrosilicon, ferromanganese, aluminum, copper, Ferrovanadium is vacuum smelted, and the temperature of molten steel continues to rise to 1550°C. After the temperature drops to 1420°C, casting is carried out to obtain ingots with a diameter of Φ70mm, which are air-cooled;

[0073] Step S2: Heat the above-mentioned ingot to 1100°C, keep it warm for 1 hour for homogenization, and perform forging. The initial forging temperature is 1050°C, and the final forging temperature is 950°C. Roll the ingot between the forging dies to make all parts All can be hit by the forging die, and after forging, a steel billet with a diameter of Φ100mm is obtained,...

Embodiment 2

[0076] The chemical composition of the steel of this embodiment is shown in Table 1, and the preparation method comprises the steps:

[0077] Step S1. Put steel scrap, pig iron, ferrochrome, ferromolybdenum, and nickel blocks into the induction melting furnace according to the distribution ratio of the alloy components. After the molten steel is dissolved, add ferrosilicon, ferromanganese, aluminum blocks, The copper block is vacuum smelted, and the temperature of the molten steel continues to rise to 1600°C. After the temperature drops to 1440°C, it is cast to obtain an ingot with a diameter of Φ75mm and air-cooled;

[0078] Step S2: Heat the above-mentioned ingot to 1130°C, keep it warm for 1.5h for homogenization, and perform forging. The initial forging temperature is 1060°C, and the final forging temperature is 970°C. All parts can be hit by the forging die, and after forging, a steel billet with a diameter of Φ120mm is obtained, which is air-cooled to room temperature; ...

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Abstract

The invention discloses steel for a high-strength, high-toughness and high-wear-resistance steel ball and a preparing method of the steel, and belongs to the technical field of steel for wear-resistant steel balls. The problems that the strength and toughness of existing steel for wear-resistant steel balls cannot meet requirements at the same time, and uniformity is poor are solved. The steel forthe wear-resistant steel ball comprises, by mass, 0.60-0.70% of C, 1.50-1.80% of Si, 0.92-1.2% of Mn, 1.30-2.00% of Cr, 0.01-0.20% of Mo, 0.25-0.60% of Ni, 0.01-0.05% of Al, 0.05-0.10% of Cu, 0.01-0.20% of V, less than or equal to 0.03% of S, 0.01-0.02% of P and the balance Fe and inevitable trace impurities, wherein the sum of Mo and V is greater than or equal to 0.08%. The preparing method includes the following steps of performing smelting to obtain molten steel, performing casting to obtain a cast ingot, forging the cast ingot to obtain a steel blank, and performing quenching and annealing treatment on the steel blank or quenching and partitioning treatment on the steel blank. The steel for the high-strength, high-toughness and high-wear-resistance steel ball is high in strength, toughness and uniformity and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of steel for wear-resistant steel balls, in particular to a steel for high-strength toughness and high wear-resistant steel balls and a preparation method thereof. Background technique [0002] With the depletion of rich ore resources in the world and the increasing demand for them, the processing capacity of lean ore processed into concentrates through ore dressing is increasing day by day. At the same time, the development of the mineral processing industry is constantly evolving towards a more optimized processing process. The obvious trend is to adopt a large-scale semi-autogenous mill process to replace the traditional intermediate processes such as medium crushing and fine crushing, so as to simplify the process and reduce infrastructure investment. The cost reduction, production cost reduction and production efficiency improvement have become the development trend of large mines at home and abroad. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/06C22C38/34C22C38/42C22C38/44C22C38/46C21D1/20C21D8/00C21D9/36C22C33/06
CPCC21D1/20C21D8/005C21D9/36C22C33/06C22C38/002C22C38/04C22C38/06C22C38/34C22C38/42C22C38/44C22C38/46
Inventor 左玲立陈蕴博潘鹏冯海滨姜庆伟张田翔王肖江张洋祁晔思
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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