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A kind of cold-rolled enamel steel and its manufacturing method

A manufacturing method and technology of enamelled steel, applied in the field of enamelled steel and its manufacture, can solve the problems of poor enamel adhesion and low yield strength of cold-rolled enamelled steel, and achieve good adhesion performance, good comprehensive performance, good formability and scale resistance explosive performance

Active Publication Date: 2021-05-14
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the objectives of the present invention is to provide a cold-rolled enamel steel, which is low in cost, has high strength and enamel adhesion performance, and still has a high adhesion level after pickling with weak acid, so that it can effectively solve the current problem. Some cold-rolled enamel steels have low yield strength and poor enamel adhesion, so they are designed to be formed, enamelled and sintered, especially suitable for two-stage water heater inner tanks

Method used

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  • A kind of cold-rolled enamel steel and its manufacturing method
  • A kind of cold-rolled enamel steel and its manufacturing method
  • A kind of cold-rolled enamel steel and its manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1-6 and comparative example 1-2

[0065] Table 1-1 and Table 1-2 list the mass percent of each chemical element in the cold-rolled enamelled steel of Example 1-6 and Comparative Example 1-2.

[0066] Table 1-1. (wt%, the balance is Fe and unavoidable impurities other than S)

[0067]

[0068]

[0069] Table 1-2. (wt%, the balance is Fe and unavoidable impurities other than S)

[0070]

[0071] Note: Ti×O×10 4 , Si×(O-2 / 3Ti)×10 4 , 3.43N+1.5S, Ti×N×10 4 , (Ti-3.43N)×S×10 4 Ti, O, Si, N, and S in all represent their respective mass percentages, and the values ​​substituted are the values ​​before the percentage sign.

[0072] The cold-rolled enamelled steels of Examples 1-6 and Comparative Examples 1-2 were produced through the following steps (see Table 2-1 and Table 2-2 for specific process parameters):

[0073] (1) The molten iron is pretreated according to the mass percentage of each chemical element in Table 1-1 and Table 1-2, and the cast slab is obtained through converter smelting, refining ...

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Abstract

The invention discloses a cold-rolled enamelled steel, the mass percentage ratio of chemical elements is: C: 0.025-0.055%, Si≤0.03%, Mn: 0.1-0.6%, P: 0.01-0.03%, S: 0.002‑0.02%, Al: 0.008‑0.05%, N: 0.002‑0.008%, Cu: 0.02‑0.05%, Cr: 0.02‑0.08%, Ti: 0.005‑0.03%, O≤0.008%, the balance is Fe and other unavoidable impurities. The invention also discloses a method for manufacturing the above-mentioned cold-rolled enamelled steel, which includes the steps: (1) smelting, refining and continuous casting to obtain a slab; (2) hot rolling; (3) pickling; (4) ) cold rolling; (5) continuous annealing: the soaking temperature is 760-800°C, the soaking time is 100-200s, the overaging temperature is 300-400°C, and the time is 200-300s; (6) leveling.

Description

technical field [0001] The invention relates to an enamelled steel and a manufacturing method thereof, in particular to a cold-rolled enamelled steel and a manufacturing method thereof. Background technique [0002] In recent years, the two-stage water heater enamel liner has developed rapidly. The production process is usually as follows: the test material is punched to form two left and right drums, and the end of the drum needs to be preheated before punching; the left and right two drums are welded by circular seam The drum is welded into an inner tank; the grease, iron oxide scale and rust on the inner surface of the cavity are removed by a pre-treatment process including degreasing, pickling, neutralization and other steps; after wet enamelling, drying, and finally in a high-temperature furnace Sintering solidifies. The production process of the enamel inner tank of the two-stage water heater is very complicated, and the quality of the inner tank largely determines th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/06C22C38/20C22C38/28C21D8/02C22C33/04
CPCC21D8/0226C21D8/0236C21D8/0247C22C33/04C22C38/04C22C38/06C22C38/20C22C38/28
Inventor 魏娇孙全社戴学诚林长青王俊凯王金涛王木
Owner BAOSHAN IRON & STEEL CO LTD
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