CN102337533A - Ferrum-chromium-aluminum blue surface treatment method - Google Patents

Abstract

The invention relates to a ferrum-chromium-aluminum blue surface treatment method, which belongs to the field of metal material processing and comprises the concrete steps that: 1) the special necessary pretreatment is carried out; 2) the furnace charging quantity is controlled to one third to one half of the normal furnace charging quantity; 3) the heat treatment charging materials are arranged on the middle position of a heat treatment furnace; and 4) the heat preservation temperature of the blue heat treatment is 840+/-10 DEG C, the time is 2 to 3h, and the quenching cooling is carried out after furnace discharge. The method has the advantages that the blue oxidation treatment is carried out before finished products leave a factory, the complicated operation procedures of users are reduced, the surfaces of ferrum-chromium-aluminum type materials are treated to present the blue color, the appearance is attractive and elegant, in addition, the compact blue oxidized protecting film can be used for effectively retarding the oxidation of oxidizing atmosphere on basal bodies, and the service lives of the products are prolonged.

Description

The blue surface-treated method of a kind of siderochrome aluminium

Technical field

The invention belongs to the metal material processing field, relate to the making method of the blue finished product of a kind of siderochrome aluminium.The finished product that this making method is handled can be silk, wire rod, also can be band.

Background technology

Siderochrome aluminium series products mainly as the electrical heating alloys element, has the characteristics of resistance height, resistance to high temperature oxidation.When high temperature used, the surface had formed fine and close protective oxide layer, can effectively slow down the oxidation of oxidizing atmosphere to matrix.Because the user receives the restriction of application conditions, in use can not be well according to the pre-oxidation treatment programmed heating of product requirement, slow cooling etc., electrical heating element often can not shape sull densification, complete, causes the decline in work-ing life.

Summary of the invention

The object of the present invention is to provide the blue surface-treated method of a kind of siderochrome aluminium; The solution user receives the restriction of application conditions; In use can not be well according to the pre-oxidation treatment programmed heating of product requirement, slow cooling etc.; Often can not shape fine and close, the complete sull of electrical heating element causes the problem of the decline in work-ing life, simultaneously a kind of preparation method of uniform and stable blue finished product of siderochrome aluminium class finished product.

The blue surface-treated method of a kind of siderochrome aluminium is characterized in that the production stage of siderochrome aluminium product is following:

1) adopt pretreatment technology: siderochrome aluminium goes to its heat in the heat alkali liquid more than 80 ℃ rapidly after deformation processing and soaked 1-1.5 hour; After the immersion, wash down surface lubricant with the high-pressure water heating more than 80 ℃ after, go into salpeter solution passivation 5-10 minute of 10%-15% rapidly, wash down with the high-pressure water heating more than 80 ℃ then, shelve rapidly and shove charge, charging temperature is 840 ± 10 ℃;

2). heat treated batch is controlled at 1/3rd to 1/2nd of normal batch;

3). the siderochrome aluminium material of when filling with substance bottommost is apart from more than the furnace bottom 20cm, and maintenance siderochrome aluminium material is in loose condition (of surface);

4). adopt well formula heat treatment furnace, 840 ± 10 ℃ of holding temperatures, time 2-3 hour, the back water cooling of coming out of the stove can obtain the blue siderochrome aluminium product that there is the blue oxide film of one deck uniformity on the surface.

The present invention carries out blue oxide and handles before finished product dispatches from the factory, reduced user's complicated operations program, the work-ing life of having improved product, and product surface has the blueness of one deck uniformity, makes the product colour consistence of production very good, and appearance looks elegant is generous.This product is primarily aimed at export market after releasing, and has received user's favorable comment.

Embodiment

Table 1 is produced embodiment

Claims (1)

1. the blue surface-treated method of a siderochrome aluminium is characterized in that the production stage of siderochrome aluminium product is following:

1) adopt pretreatment technology: siderochrome aluminium goes to its heat in the heat alkali liquid more than 80 ℃ rapidly after deformation processing and soaked 1-1.5 hour; After the immersion, wash down surface lubricant with the high-pressure water heating more than 80 ℃ after, go into salpeter solution passivation 5-10 minute of 10%-15% rapidly, wash down with the high-pressure water heating more than 80 ℃ then, shelve rapidly and shove charge, charging temperature is 840 ± 10 ℃;

2). heat treated batch is controlled at 1/3rd to 1/2nd of normal batch;

3). the siderochrome aluminium material of when filling with substance bottommost is apart from more than the furnace bottom 20cm, and maintenance siderochrome aluminium material is in loose condition (of surface);

4). adopt well formula heat treatment furnace, 840 ± 10 ℃ of holding temperatures, time 2-3 hour, the back water cooling of coming out of the stove can obtain the blue siderochrome aluminium product that there is the blue oxide film of one deck uniformity on the surface.