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Boric low alloy wear resistant steel for pump

A low-alloy, wear-resistant steel technology, applied in the field of metal casting materials, can solve the problems of reducing the metallurgical quality of wear-resistant steel, damaging the plasticity and toughness of steel, and increasing inclusions, achieving good toughness effect, high wear resistance, The effect of simple production process

Active Publication Date: 2012-03-07
SHANDONG SHUANGLUN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this alloy cast steel is that due to the high boron content, the brittleness of the steel increases; the high calcium content increases the inclusions in the steel, and the excessive yttrium will cause the inclusions to be distributed in a broken chain. On the contrary, it damages the plasticity and toughness of steel, and reduces the metallurgical quality of wear-resistant steel

Method used

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  • Boric low alloy wear resistant steel for pump
  • Boric low alloy wear resistant steel for pump
  • Boric low alloy wear resistant steel for pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The boron-containing multi-element low-alloy wear-resistant cast steel for pumps in this embodiment is molded with furan resin sand and melted in a 1000kg medium-frequency induction furnace with neutral lining. The required raw materials are: medium-carbon ferrochrome, nitrogen-containing ferrochrome, electrolytic nickel, ferromolybdenum, medium-carbon ferromanganese, ferroboron, ferrosilicon, electrolytic aluminum, scrap steel, foundry pig iron, heavy rare earth yttrium alloy modifier, slagging agent wait. The feeding sequence is as follows: Put scrap steel, ferromolybdenum, electrolytic nickel and cast pig iron into the furnace, and then turn on the electricity, supply 60% of the power at the beginning of the electricity, when the current fluctuation is small, gradually increase the power to the maximum, and at any time Stamping; after most of the charge is melted, add medium-carbon ferrochromium to continue melting, and add ferrosilicon and medium-carbon ferromangane...

Embodiment 2

[0050] The boron-containing multi-element low-alloy wear-resistant cast steel for pumps in this embodiment is molded with furan resin sand and smelted in a 1000kg medium-frequency induction furnace with a basic furnace lining. The required raw materials are: medium-carbon ferrochrome, nitrogen-containing ferrochrome, electrolytic nickel, ferromolybdenum, medium-carbon ferromanganese, ferroboron, ferrosilicon, electrolytic aluminum, scrap steel, foundry pig iron, heavy rare earth yttrium alloy modifier, slagging agent etc., the feeding sequence is as follows: put scrap steel, ferromolybdenum, electrolytic nickel and foundry pig iron into the furnace and turn on the electricity, supply 60% power at the beginning of electricity, when the current fluctuation is small, gradually increase the power to the maximum, And pound the material at any time; after most of the charge melts, add medium-carbon ferrochrome to continue melting, and add ferrosilicon and medium-carbon ferromanganese...

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Abstract

The invention relates to the technical field of metal casting materials, and concretely relates to boric low alloy wear resistant steel for a pump. The steel is characterized in that the steel comprises the following chemical components: 0.33 wt% of C, 1.20 wt% of Mn, 1.30 wt% of Si, 1.35 wt% of Cr, 0.30 wt% of Mo, 0.40 wt% of Ni, 0.05 wt% of N, 0.002-0.0025 wt% of B, 0.002-0.003 wt% of Y, and the balance Fe and avoidless impurities. The boric low alloy wear resistant steel for the pump, which has the characteristics of high strength and hardness, and excellent tissue and performance, is obtained through molding a boric low alloy wear resistant steel casting with resin sand, and carrying out heat treatment consisting of quenching and tempering on the casting. The boric low alloy wear resistant steel of the invention has the advantages of high hardness, good toughness effect, high wear resistance, certain corrosion resistance, simple production technology, low production cost and the like.

Description

technical field [0001] The invention relates to the technical field of metal casting materials, in particular to a boron-containing low-alloy wear-resistant steel for pumps. Background technique [0002] Pump is a general-purpose machine with a wide range of applications, and its application fields are very broad. Where there is liquid flow, almost all pumps are working. According to the statistics of different countries, the power consumption of pumps accounts for about 1 / 5 of the total power generation. It can be seen that improving the technical level of pumps is of great significance to saving energy consumption. The development level of pump materials represents the level of pump manufacturing. The selection of materials is directly subject to factors such as the type of conveying medium, temperature, pump pressure, and the stress state of pump internals, which affect the performance and service life of the pump. As an important cause of pump failure, wear is also one ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/54C21D8/02C21C7/06B22D1/00
CPCY02P10/20
Inventor 刘军邹英杰张启良
Owner SHANDONG SHUANGLUN
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