A treatment method for reducing heavy metal content in stainless steel table knives

A treatment method, stainless steel technology, applied in the field of reducing heavy metal content in stainless steel table knives, can solve the problems of excessive heavy metal content, endangering human health, and slow precipitation, etc., to reduce heavy metal content and improve antibacterial performance , Improve the effect of bacterial resistance

Inactive Publication Date: 2021-07-06
WENZHOU KULE DINING TABLE ARTICLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, stainless steel tableware, which is widely used, has gradually become the first choice for tableware products due to its good corrosion resistance, high strength, and hard texture, especially stainless steel table knives. It is made by adding trace metal elements such as nickel, molybdenum, titanium, manganese, etc. If poor-quality stainless steel is selected or handled or used improperly, the heavy metal content will exceed the standard, and the trace metal elements in stainless steel will slowly precipitate and contaminate food. Slowly accumulate, when the accumulated amount reaches a certain limit, it will endanger human health

Method used

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  • A treatment method for reducing heavy metal content in stainless steel table knives

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Such as figure 1 As shown, a kind of processing method that the present embodiment 1 provides reduces the heavy metal content in the stainless steel table knife, comprises the steps:

[0078] Step 1: Raw material selection

[0079] Select nickel-free antibacterial stainless steel raw materials for stainless steel synthesis;

[0080] The nickel-free antibacterial stainless steel raw material includes the following components by mass percentage:

[0081] C: 0.01%;

[0082] Si: 3.1%;

[0083] Mn: 1.00%;

[0084] S: 0.003%;

[0085] P: 0.02%;

[0086] Cr: 9.0%;

[0087] Mo: 0.8%;

[0088] W: 0.7%;

[0089] B: 0.08%;

[0090] Ag: 0.1%;

[0091] Cu: 4.0%;

[0092] Nb: 0.001%;

[0093] N: 0.6%;

[0094] Ba: 0.15%;

[0095] Rare earth: 0.01%;

[0096] Fe balance;

[0097] The rare earth is a lanthanide rare earth, and the content of La in the lanthanide rare earth is 60%.

[0098] Described stainless steel is synthesized, comprises the steps:

[0099] Step 11...

Embodiment 2

[0135] Such as figure 1 As shown, a kind of processing method that the present embodiment 2 provides reduces the heavy metal content in the stainless steel table knife, comprises the steps:

[0136] Step 1: Raw material selection

[0137] Select nickel-free antibacterial stainless steel raw materials for stainless steel synthesis;

[0138] The nickel-free antibacterial stainless steel raw material includes the following components by mass percentage:

[0139] C: 0.015%;

[0140] Si: 3.5%;

[0141] Mn: 2.00%;

[0142] S: 0.005%;

[0143] P: 0.025%;

[0144] Cr: 9.5%;

[0145] Mo: 1.3%;

[0146] W: 1.2%;

[0147] B: 0.13%;

[0148] Ag: 0.12%;

[0149] Cu: 4.5%;

[0150] Nb: 0.003%;

[0151] N: 0.7%;

[0152] Ba: 0.2%;

[0153] Rare earth: 0.1%;

[0154] Fe balance;

[0155] The rare earth is a lanthanide rare earth, and the content of La in the lanthanide rare earth is 65%.

[0156] Described stainless steel is synthesized, comprises the steps:

[0157] Step 11:...

Embodiment 3

[0193] Such as figure 1 As shown, a kind of processing method that the present embodiment 3 provides reduces the heavy metal content in the stainless steel table knife, comprises the steps:

[0194] Step 1: Raw material selection

[0195] Select nickel-free antibacterial stainless steel raw materials for stainless steel synthesis;

[0196] The nickel-free antibacterial stainless steel raw material includes the following components by mass percentage:

[0197] C: 0.02%;

[0198] Si: 3.9%;

[0199] Mn: 3.00%;

[0200] S: 0.006%;

[0201] P: 0.03%;

[0202] Cr: 10.0%;

[0203] Mo: 1.5%;

[0204] W: 1.5%;

[0205] B: 0.16%;

[0206] Ag: 0.13%;

[0207] Cu: 5.0%;

[0208] Nb: 0.05%;

[0209] N: 0.8%;

[0210] Ba: 0.3%;

[0211] Rare earth: 0.2%;

[0212] Fe balance;

[0213] The rare earth is a lanthanide rare earth, and the content of La in the lanthanide rare earth is 70%.

[0214] Described stainless steel is synthesized, comprises the steps:

[0215] Step 11:...

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Abstract

The invention discloses a treatment method for reducing heavy metal content in stainless steel table knives, which belongs to the technical field of tableware processing, and includes: selecting nickel-free antibacterial stainless steel raw materials, and performing stainless steel synthesis; processing the synthesized nickel-free antibacterial stainless steel into stainless steel table knives Blank; use dilute nitric acid solution to mix stainless steel synthetic wastewater to rinse the stainless steel table knife blank; use dilute nitric acid solution to mix the mixed solution of sodium chromate and sodium nitrate to treat the surface of the leached blank to make the surface of the blank The heavy metal is precipitated; the blank is coated with an antibacterial biphasic copolymer; after the coating, the blank is baked and formed to obtain a stainless steel table knife. The invention effectively reduces the heavy metal content in the stainless steel table knife, and improves the bacteria resistance and high fracture performance of the stainless steel table knife.

Description

technical field [0001] The invention relates to a treatment method for reducing heavy metal content, in particular to a treatment method for reducing heavy metal content in stainless steel table knives, which belongs to the technical field of tableware treatment. Background technique [0002] In recent years, due to the acceleration of people's work rhythm, the improvement of living standards, and the public's pursuit of a healthy quality of life, tableware hygiene has become a hot spot that people pay close attention to. However, tableware hygiene is not up to standard everywhere. Many cities Sampling checks on tableware by the health supervision department show that the total number of bacteria detected in most tableware is dozens of times higher than the minimum value of the national standard, directly endangering people's physical and mental health, and the social harm caused by unhygienic tableware cannot be ignored. [0003] At present, stainless steel tableware, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/08B23P15/00C25D11/02C22C38/34C22C38/38C22C38/04C22C38/22C22C38/32C22C38/20C22C38/26C02F9/14C02F103/16C02F101/20
CPCB23P15/00C02F1/001C02F1/20C02F1/66C02F3/34C02F9/00C02F2101/20C02F2103/16C22C38/001C22C38/002C22C38/005C22C38/007C22C38/04C22C38/20C22C38/22C22C38/26C22C38/32C22C38/34C22C38/38C23G1/085C25D11/026
Inventor 伍宗旭
Owner WENZHOU KULE DINING TABLE ARTICLES CO LTD
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