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Low-chromium wear-resisting steel ball

A technology of wear-resistant steel and steel balls, applied in heat treatment equipment, furnaces, heat treatment furnaces, etc., can solve problems such as fragility and galvanic corrosion, increase hardenability, increase hardness and wear resistance, and suppress transition deterioration Effect

Inactive Publication Date: 2016-02-17
NINGGUO SOUTHERN WEAR RESISTANT MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, large-diameter wear-resistant steel balls are prone to galvanic corrosion due to wet grinding, and large-diameter high-chromium cast balls are easily broken. Therefore, research and development of large-diameter wear-resistant steel balls with high wear resistance, high toughness, low cost, and corrosion resistance become a priority

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A low-chromium wear-resistant steel ball with a diameter of 120 mm, the weight percentage of each component is as follows: C: 0.9%, Si: 0.3%, Mn: 1%, Cr: 0.9%, Ni: 0.09%, Mo: 0.07% , Al: 0.04%, Cu: 0.3%, B: 0.002%, V: 0.19%, P: 0.014%, S: 0.001%, and the rest is Fe;

[0019] During the preparation process, the low-chromium wear-resistant steel ball is prepared according to the following process steps:

[0020] S1. Smelting: adding steel scrap to ladle for baking, melting, testing, adding carbon, chromium, silicon, manganese, nickel, molybdenum, aluminum, copper, boron, vanadium, rough smelting, refining, continuous casting, rolling to obtain the composition satisfaction Hot-rolled round steel in the above range;

[0021] S2. Forging: Take the hot-rolled round steel obtained in S1, raise the temperature to 900°C, keep it warm for 35 minutes, raise the temperature to 1000°C at a speed of 30°C / s, keep it warm for 45 minutes, cut it into material sections, forge it 25 time...

Embodiment 2

[0024] A low-chromium wear-resistant steel ball with a diameter of 160 mm, the weight percentage of each component is as follows: C: 0.7%, Si: 0.5%, Mn: 0.8%, Cr: 1.1%, Ni: 0.07%, Mo: 0.09% , Al: 0.03%, Cu: 0.5%, B: 0.0005%, V: 0.21%, P: 0.01%, S: 0.0012%, and the rest is Fe;

[0025] During the preparation process, the low-chromium wear-resistant steel ball is prepared according to the following process steps:

[0026] S1. Smelting: adding steel scrap to ladle for baking, melting, testing, adding carbon, chromium, silicon, manganese, nickel, molybdenum, aluminum, copper, boron, vanadium, rough smelting, refining, continuous casting, rolling to obtain the composition satisfaction Hot-rolled round steel in the above range;

[0027] S2. Forging: Take the hot-rolled round steel obtained in S1, raise the temperature to 800°C, keep it warm for 45 minutes, raise the temperature to 1100°C at a speed of 10°C / s, keep it warm for 35 minutes, cut it into material sections, forge it 30 t...

Embodiment 3

[0030] A low-chromium wear-resistant steel ball with a diameter of 130 mm, the weight percentage of each component is as follows: C: 0.85%; Si: 0.35%; Mn: 0.95%; Cr: 0.95%; Ni: 0.085%; Mo: 0.075% ; Al: 0.038%; Cu: 0.35%; B: 0.0015%; V: 0.195%; P: 0.012%; S: 0.001%;

[0031] During the preparation process, the low-chromium wear-resistant steel ball is prepared according to the following process steps:

[0032] S1. Smelting: adding steel scrap to ladle for baking, melting, testing, adding carbon, chromium, silicon, manganese, nickel, molybdenum, aluminum, copper, boron, vanadium, rough smelting, refining, continuous casting, rolling to obtain the composition satisfaction Hot-rolled round steel in the above range;

[0033] S2. Forging: Take the hot-rolled round steel obtained in S1, raise the temperature to 870°C, keep it warm for 38 minutes, raise the temperature to 1030°C at a speed of 25°C / s, keep it warm for 42 minutes, cut it into material sections, forge it 27 times, adjus...

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Abstract

The invention discloses a low-chromium wear-resisting steel ball. The low-chromium wear-resisting steel ball comprises, by weight, 0.7%-0.9% of C, 0.3%-0.5% of S, 0.8%-1% of Mn, 0.9%-1.1% of Cr, 0.07%-0.09% of Ni, 0.07%-0.09% of Mo, 0.03%-0.04% of Al, 0.3%-0.5% of Cu, 0.0005%-0.002% of B, 0.19%-0.21% of V, 0.01%-0.014% of P, 0.001%-0.0012% of S and the balance Fe. The low-chromium wear-resisting steel ball is high in wear resistance, good in toughness, high in impact resistance, resistant to corrosion and low in cost.

Description

technical field [0001] The invention relates to the technical field of grinding machines, in particular to a low-chromium wear-resistant steel ball. Background technique [0002] Wear-resistant steel balls have been widely used in metallurgy, mineral processing, building materials, chemical industry, electric power and other industrial production. At present, the most commonly used wear-resistant steel balls include low-alloy steel cast balls, chromium alloy cast iron balls, alloy steel forged balls, etc., but there are still many problems in the use of these wear-resistant steel balls. For example: while increasing the hardness of wear-resistant steel balls, the toughness is reduced, leading to an increase in breakage rate; increasing the content of alloy elements can improve hardenability, increase the hardness of wear-resistant steel balls, but at the same time increase production cost. With the development of ball mills in the direction of large-scale, higher requireme...

Claims

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Application Information

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IPC IPC(8): C22C38/54C21D9/36
Inventor 熊夏鸣
Owner NINGGUO SOUTHERN WEAR RESISTANT MATERIALS
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