A chain stainless steel for food and its preparation method

A stainless steel and chain technology, applied in the field of food chain stainless steel and its preparation, can solve the problems of high price and increased use cost, and achieve the effect of low cost and high steel purity

Active Publication Date: 2021-11-26
ZHENSHI GRP HUAZHI RES INST (ZHEJIANG) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with ordinary carbon steel, stainless steel has a smoother surface, good corrosion resistance, easy maintenance and long life cycle. In the field of food chain, 304 stainless steel or 316 stainless steel with excellent processing performance and mature manufacturing technology is usually used. Relatively speaking, The price of these steels is high, which increases the cost of use by enterprises. Based on the above-mentioned status quo, it is necessary to provide a stainless steel chain for food that has excellent mechanical properties, surface quality, corrosion resistance and low price at room temperature to meet the needs of food transportation. Field usage needs

Method used

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  • A chain stainless steel for food and its preparation method
  • A chain stainless steel for food and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment 1 discloses a stainless steel chain for food, which consists of the following chemical components in terms of mass percentage: C: 0.04-0.07%; Si: 0.5-1.0%; Mn: 0.5-1.0%; Cr: 14.0-14.5% ; Ni: 1.3-1.7%; S: <0.002%; P: <0.025%; Ti: 0.3-0.5%; Mo: 0.2-0.4%; the balance is Fe and unavoidable impurities.

[0029] This embodiment 1 also discloses a method for preparing stainless steel chains for food. The preparation method adopts the technological process of "electric furnace-AOD-LF-continuous casting-hot rolling-solution pickling".

[0030] The concrete steps of the preparation method of food chain stainless steel are as follows:

[0031] The first step: the electric furnace uses scrap steel and ferronickel as raw materials for batching. During smelting, foam slag is formed and slag is flowed, and the slag is replaced. The end point of molten steel is C>1%, P<0.02%, and 100% of the steel is blocked from slag;

[0032] Step 2: In the AOD furnace, decarburize b...

Embodiment 2

[0046] This embodiment 2 discloses a chain stainless steel for food, which consists of the following chemical components in terms of mass percentage: C: 0.056%; Si: 0.62%; Mn: 0.61%; Cr: 14.33%; Ni: 1.45%; S: 0.0017 %; P: 0.021%; Ti: 0.38%; Mo: 0.2%; the balance is Fe and unavoidable impurities.

[0047] The preparation method of this chain stainless steel for food is:

[0048] The first step: the electric furnace uses steel scrap and ferronickel as raw materials for batching. During smelting, foamy slag is formed, slag is flowed, and slag is replaced. The end point of molten steel is C=1.7%, P=0.013%, and 100% of the steel is blocked from slag;

[0049] Step 2: In the AOD furnace, decarburize by blowing oxygen from the side and top of the furnace, denitrify by blowing argon from the side all the way, decarburize in stages, and add high-carbon ferrochromium, ferromanganese, and silicon in batches during the blowing process Alloying iron and other alloys, adding lime, fluorite...

Embodiment 3

[0057] A stainless steel chain for food is disclosed in Example 3, which consists of the following chemical components in terms of mass percentage: C: 0.068%; Si: 0.72%; Mn: 0.66%; Cr: 14.25%; Ni: 1.40%; S: 0.0014%; P: 0.019%; Ti: 0.36%; Mo: 0.31%; the balance is Fe and unavoidable impurities.

[0058] The preparation method of this chain stainless steel for food is:

[0059] The first step: the electric furnace uses steel scrap and ferronickel as raw materials for batching. During smelting, foamy slag is formed, slag is flowed, and slag is replaced. The end point of molten steel is C = 2.03%, P = 0.010%, and 100% of the steel is blocked from slag;

[0060] Step 2: In the AOD furnace, oxygen decarburization is re-blown from the side and top of the furnace, argon is blown from the whole side to denitrify, decarburization is carried out in stages, and high-carbon ferrochromium, ferromanganese, and silicon are added in batches during the blowing process Alloying iron and other a...

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Abstract

The invention relates to a chain stainless steel for food and a preparation method thereof. The stainless steel chain for food is composed of the following chemical components according to mass percentage: C: 0.04-0.07%; Si: 0.5-1.0%; Mn: 0.5-1.0%; Cr: 14.0~14.5%; Ni: 1.3~1.7%; S: <0.002%; P: <0.025%; Ti: 0.3~0.5%; Mo: 0.2~0.4%; the balance is Fe and unavoidable impurities. The preparation method adopts the technological process of "electric furnace-AOD-LF-continuous casting-hot rolling-solution pickling". The food chain stainless steel made by the preparation method has low cost, low oxygen and nitrogen content in the steel, high steel purity, mechanical properties, surface quality, etc. all meet the requirements in the field of food chain transmission, and can be processed into various specifications.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a chain stainless steel for food and a preparation method thereof. Background technique [0002] Chain is an important part necessary for mechanical transmission equipment, which has an important impact on the production efficiency and safety of transmission equipment. The traditional materials of my country's chains are mainly made of ordinary carbon steel such as No. 45 and 40Mn. With the progress of the machinery industry and the needs of working environment and other factors, ordinary 45, 40Mn carbon steel has been difficult to meet the needs of chains with higher performance such as wear resistance, corrosion resistance, fatigue resistance and deep drawing. Especially for chain steel used in the food field, in addition to strict requirements on the above properties of the steel, there are also high requirements on the surface finish and flatness of the material. Compared wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/50C21C7/064C21C7/068C21C7/072C22C33/04
CPCC21C7/064C21C7/068C21C7/072C22C33/04C22C38/02C22C38/04C22C38/44C22C38/50
Inventor 孙路恩颜海涛赵磊马伟杰金军丁以林马登德
Owner ZHENSHI GRP HUAZHI RES INST (ZHEJIANG) CO LTD
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