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High-carbon middle-chromium abrasion-resistant steel ball

A wear-resistant steel, high-carbon technology, applied in the field of grinding machinery, can solve the problems affecting product quality, quenching cracking, thermal stress and structural stress, etc., to achieve the effect of improving comprehensive performance, long service life, and optimizing the preparation process

Inactive Publication Date: 2016-03-23
NINGGUO SOUTHERN WEAR RESISTANT MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At the same time, in the current technology, quenching treatment is performed after preheating. Due to the high quenching temperature, it is easy to cause large thermal stress and structural stress, and it is easy to cause quenching cracks and affect the quality of the product.

Method used

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  • High-carbon middle-chromium abrasion-resistant steel ball

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of high-carbon medium chromium wear-resistant steel ball proposed by the present invention has the weight percentages of its components as follows: C: 0.9%; Cr: 7.8%; Si: 0.85%; Mn: 0.9%; Mo: 0.50%; B : 1.3%; Ti: 0.08%; Al: 0.12%; S: 0.01%; P: 0.03%, the balance is Fe and unavoidable impurities;

[0029] According to the distribution ratio of the above-mentioned components, the high-carbon medium-chromium wear-resistant steel ball is prepared according to the following process steps:

[0030] S1: Weigh the raw materials according to the weight percentage of each component, carry out smelting and initial composition adjustment to obtain molten iron, refining desulfurization, deoxidation, fine-tuning the composition, pouring, after casting and molding, cleaning to obtain castings;

[0031] S2: Preheat the casting obtained in S1 at 1000°C for 40 minutes, then rapidly heat it for 42 minutes, keep it warm for 2.5 hours, and then perform pre-cooling in clean water. The...

Embodiment 2

[0034] The present invention proposes a high-carbon medium chromium wear-resistant steel ball, the weight percentage of each component is as follows: C: 0.7%; Cr: 8.5%; Si: 0.7%; Mn: 1.5%; Mo: 0.35%; B: 2.2%; Ti: 0.02%; Al: 0.18%; P: 0.06%, the balance is Fe and unavoidable impurities;

[0035] According to the distribution ratio of the above-mentioned components, the high-carbon medium-chromium wear-resistant steel ball is prepared according to the following process steps:

[0036] S1. Weigh the raw materials according to the weight percentage of each component, carry out smelting and initial composition adjustment to obtain molten iron, refining desulfurization, deoxidation, fine-tuning the composition, pouring, after casting and forming, cleaning to obtain castings;

[0037] S2. Preheat the casting obtained in S1 at 950° C. for 45 minutes, then rapidly heat it for 40 minutes, keep it warm for 3 hours, and then perform precooling treatment in clear water. The time of precoolin...

Embodiment 3

[0040] The present invention proposes a high-carbon medium chromium wear-resistant steel ball, the weight percentage of each component is as follows: C: 1.1%; Cr: 7.0%; Si: 1.0%; Mn: 0.3%; Mo: 0.65%; B: 0.3%; Ti: 0.13%; Al: 0.05%; S: 0.02%, the balance is Fe and unavoidable impurities;

[0041] According to the distribution ratio of the above-mentioned components, the high-carbon medium-chromium wear-resistant steel ball is prepared according to the following process steps:

[0042] S1. Weigh the raw materials according to the weight percentage of each component, carry out smelting and initial composition adjustment to obtain molten iron, refining desulfurization, deoxidation, fine-tuning the composition, pouring, after casting and forming, cleaning to obtain castings;

[0043] S2. Preheat the casting obtained in S1 at 1050° C. for 35 minutes, then rapidly heat it for 45 minutes, keep it warm for 2 hours, and then perform pre-cooling treatment in clean water. The time of pre-c...

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Abstract

This invention provides a high-carbon middle-chromium abrasion-resistant steel ball. The high-carbon middle-chromium abrasion-resistant steel ball comprises, by weight, 0.7%-1.1% of C, 7.0%-8.5% of Cr, 0.7%-1.0% of Si, 0.3%-1.5% of Mn, 0.35%-0.65% of Mo, 0.3%-2.2% of B, 0.02%-0.13% of Ti, 0.05%-0.18% of Al, 0.000%-0.02% of S, 0.00%-0.06% of P, and the balance Fe and inevitable impurities. The high-carbon middle-chromium abrasion-resistant steel ball has the characteristics of being high in hardness and abrasion resistance and long in service life.

Description

technical field [0001] The invention belongs to the technical field of grinding machines, and in particular relates to a high-carbon medium-chromium wear-resistant steel ball. Background technique [0002] Wear-resistant steel ball is a kind of crushing medium used in ball mills, which is used to crush the materials in the mill. There are two types of wear-resistant steel balls: one is white cast iron with chromium as the main alloying element, referred to as chromium alloy cast iron, and the cast grinding ball made of chromium alloy cast iron is called chromium alloy cast iron grinding ball; the other is, Cast grinding balls made of ductile iron are called ductile iron grinding balls, in which the matrix structure obtained by heat treatment is mainly bainite ductile iron grinding balls, referred to as bainite ductile iron grinding balls; Martensitic ductile iron grinding balls are referred to as martensitic ductile iron grinding balls. [0003] Among them, chromium alloy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/32C22C38/28C22C38/22C22C38/06C22C38/04C22C38/02C22C33/04
CPCC22C38/32C22C33/04C22C38/02C22C38/04C22C38/06C22C38/22C22C38/28
Inventor 熊夏鸣
Owner NINGGUO SOUTHERN WEAR RESISTANT MATERIALS
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