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Steel ball special for aerated brick steel mold capsule

A technology of aerated bricks and steel molds, applied in the field of wear-resistant steel balls, which can solve the problems of poor surface quality of wear-resistant steel balls, decline in comprehensive performance, increase of chromium content in wear-resistant steel balls, etc., and achieve the effect of improving product quality

Inactive Publication Date: 2014-08-13
宁国市宁武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

[0002] As we all know, the higher the chromium content in wear-resistant steel balls, the better the comprehensive performance of wear-resistant steel balls. However, due to the limitation of production technology, the comprehensive performance of wear-resistant steel balls will drop sharply after the chromium content in wear-resistant steel balls reaches a certain level. Therefore, How to solve the contradiction between increasing the chromium content in wear-resistant steel balls and the limitations of existing production processes has become a problem that plagues people
[0003] In the existing pouring process of wear-resistant steel balls, the mold is poured at room temperature, resulting in rapid cooling of molten iron and poor surface quality of wear-resistant steel balls

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (2) Heat treatment process: The production process of a special steel ball for aerated brick steel mold capsule is as follows:

[0039] (1) Melting process:

[0040] The first step of smelting: melting in an intermediate frequency induction furnace, adding Si: 0.3Kg, Mn: 1.3Kg, Cr: 18Kg, Mo: 0.3Kg, Ni: 0.5Kg, scrap iron or scrap steel 79.6Kg into the intermediate frequency induction furnace, fully smelting ;

[0041] The second step of pouring: Preheat the metal mold, pour it into the metal mold at a constant temperature, and then cool down to obtain the rough casting; put the rough casting into the heating furnace after unpacking and polishing;

[0042] Quenching: The heating furnace is heated to 650°C, and after holding for 2 hours, it is quenched in a water pool at 1000°C. After 2 hours, the quenching process is repeated once, and then put into the tempering furnace;

[0043] Tempering: The tempering furnace temperature is controlled at 250°C, tempered for 8 hours...

Embodiment 2

[0045] The production process of a special steel ball for aerated brick steel mold capsule is as follows:

[0046] (1) Melting process:

[0047] The first step of smelting: melting in an intermediate frequency induction furnace, adding Si: 2.6Kg, Mn: 2Kg, Cr: 20Kg, Mo: 0.5Kg, Ni: 1Kg, scrap iron or scrap steel 73.9Kg into the intermediate frequency induction furnace, and fully smelted;

[0048] The second step of pouring: Preheat the metal mold, pour it into the metal mold at a constant temperature, and then cool down to obtain the rough casting; put the rough casting into the heating furnace after unpacking and polishing;

[0049] (2) Heat treatment process:

[0050] Quenching: Heat the furnace to 650°C, keep it warm for 4 hours, then quench it in a water pool at 1050°C, repeat the quenching process once after 2 hours, and put it into the tempering furnace;

[0051] Tempering: The temperature of the tempering furnace is controlled at 280°C, tempered for 9 hours, and high ch...

Embodiment 3

[0053] The production process of a special steel ball for aerated brick steel mold capsule is as follows:

[0054] (1) Melting process:

[0055] The first step of smelting: Melting in an intermediate frequency induction furnace, adding Si: 0.4Kg, Mn: 1.8Kg, Cr: 19Kg, Mo: 0.4Kg, Ni: 0.8Kg, scrap iron or scrap steel 77.6Kg into the intermediate frequency induction furnace, fully smelting ;

[0056] The second step of pouring: Preheat the metal mold, pour it into the metal mold at a constant temperature, and then cool down to obtain the rough casting; put the rough casting into the heating furnace after unpacking and polishing;

[0057] (2) Heat treatment process:

[0058] Quenching: the heating furnace is heated to 650°C, and after 3 hours of heat preservation, it is quenched in a pool of 1000°C, and after 2 hours, the quenching process is repeated once, and then put into the tempering furnace;

[0059] Tempering: The tempering furnace temperature is controlled at 270°C, temp...

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PUM

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Abstract

The invention relates to a steel ball special for an aerated brick steel mold capsule. The steel ball mainly comprises, by weight, 1.5% to 2.6% of C, 0.3% to 0.6% of Si, 1.3% to 2.0% of Mn, 18% to 20% of Cr, 0.3% to 0.5% of Mo, 0.5% to 1.0% of Ni and the balance Fe. The steel ball has the advantages that the raw material can be easily obtained; besides, as is well known, the higher the content of chromium in the abrasion-resistant steel ball is, the better the comprehensive performance of the abrasion-resistant steel ball is, however, due to the limitation of the production process, the comprehensive performance of the abrasion-resistant steel ball can sharply decrease when the content of chromium in the abrasion-resistant steel ball reaches a certain degree, and at present, the content of chromium in high-performance abrasion-resistant steel balls in China generally ranges from 13% to 15%, but according to the scheme, the content of chromium in the abrasion-resistant steel ball reaches 18% to 20%, and the comprehensive performance is good. According to the scheme, twice quenching is adopted, and therefore product quality is further improved.

Description

technical field [0001] The invention relates to the technical field of wear-resistant steel balls, and the technology relates to a special steel ball for aerated brick steel mold capsules. Background technique [0002] As we all know, the higher the chromium content in wear-resistant steel balls, the better the comprehensive performance of wear-resistant steel balls. However, due to the limitation of production technology, the comprehensive performance of wear-resistant steel balls will drop sharply after the chromium content in wear-resistant steel balls reaches a certain level. Therefore, How to solve the contradiction between increasing the chromium content in the wear-resistant steel ball and the limitation of the existing production process has become a problem that plagues people. [0003] In the existing pouring process of wear-resistant steel balls, the mold is poured at room temperature, resulting in rapid cooling of molten iron and poor surface quality of wear-resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C38/56C22C38/44C22C37/10C21D1/18C21D9/36
Inventor 丁仕武其他发明人请求不公开姓名
Owner 宁国市宁武新材料科技有限公司