Low-carbon low-phosphorus nickel-chromium-iron alloy used for stainless acid resistant steel and preparation method thereof

A technology of carbon-low-phosphorus nickel-chromium and acid-resistant steel, which is applied in the field of low-carbon low-phosphorus nickel-chromium-iron alloy and its preparation, can solve the problems of nickel-chromium-iron alloy with high carbon content and high phosphorus content, so as to improve performance, increase metal yield, Effect of lowering carbon content

Inactive Publication Date: 2012-01-04
LIAONING JIUTONG FRICTION MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a low-carbon, low-phosphorus nickel-chromium alloy to solve the problems of existing nickel-chromium-iron alloys containing carbon and high phosphorus content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Produce one ton of a product containing 30% nickel, 10% chromium, carbon≤0.3%, silicon≤1.0%, sulfur≤0.1%, phosphorus≤0.035%, and the balance is iron.

[0023] making process:

[0024] Ingredients; chrome ore: 245kg, containing 45% Cr 2 o 3 , 12% Fe 2 o 3 , 8% SiO 2 , 10% Al 2 o 3 , 16% MgO.

[0025] Silicon-chromium alloy: 100kg, containing 35% chromium, 46% silicon, 0.04% carbon, 0.02% phosphorus, 0.01% sulfur and iron balance.

[0026] Recover 840kg of waste nickel (average nickel content ≥ 35%), among which, the impurity content of silicon, sulfur and phosphorus meets the requirements of the target value.

[0027] Lime 220-260kg (calcium oxide ≥ 80%), fluorite 23-39kg (calcium fluoride ≥ 75%).

[0028] Specific steps are as follows:

[0029] (1) First spread appropriate amount of lime on the bottom of electric arc furnace or submerged arc furnace, then add chrome ore and about 40% waste nickel raw materials for melting.

[0030] (2) Add sili...

Embodiment 2

[0035] Example 2: Using the above method, the nickel-chromium-iron alloy of the present invention is prepared, which contains: 30.15% nickel, 11.20% chromium, 0.1% carbon, 0.06% sulfur, 0.01% phosphorus, and 0.89% silicon.

Embodiment 3

[0036] Example 3: Using the above method, the nickel-chromium-iron alloy of the present invention is prepared, which contains: 25.83% nickel, 10.12% chromium, 0.32% carbon, 0.21% sulfur, 0.027% phosphorus, and 2.0% silicon.

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Abstract

The invention discloses a low-carbon low-phosphorus nickel-chromium-iron alloy used for stainless acid resistant steel, which is characterized by comprising the following components in weight percent: 12 to 70 percent of nickel, 3 to 12 percent of chromium, less than 0.5 percent of carbon, less than 0.3 percent of sulphur, less than 0.035 percent of phosphorus, less than 2.5 percent of silicon and the balance of ferrum. The invention is mainly suitable for alloying stainless acid resistant steel. The alloy has low carbon and low phosphorus, which can effectively relieve the load of decarburization in the steel-making process, greatly prolongs the pulverization period of the alloy and meanwhile is beneficial to the production demands of clean steel.

Description

technical field [0001] The invention relates to an alloying agent for stainless and acid-resistant steel, in particular to a low-carbon and low-phosphorus nickel-chromium-iron alloy and a preparation method thereof. Background technique [0002] At present, the smelting of stainless steel mainly uses blast furnace hot metal, high-carbon ferrochrome, nickel-iron and stainless steel scrap as raw materials in converters or electric furnaces. The production of high-carbon ferrochrome requires smelting in electric furnaces , this smelting process is energy-intensive and expensive. The production of ferronickel involves non-ferrous metallurgy, and different nickel extraction methods are selected for different nickel ores. Because nickel ore contains low nickel grade, complex composition, many associated gangues, and is a refractory material, the production process of nickel extraction is very complicated and the production cost is high. [0003] Therefore, many nickel-chromium-i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/40C22C33/04C21C7/00
Inventor 王宏林曹红岗
Owner LIAONING JIUTONG FRICTION MATERIALS
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