Method for preparing nickel-boron alloy coating on continuous casting crystallizer copper plate surface

A technology for continuous casting mold and nickel-boron alloy, which is applied in the field of preparing nickel-boron alloy coating on the surface of continuous casting mold copper plate, can solve the problem that nickel-boron alloy is not fully suitable for mold copper plate coating, etc., so as to improve the surface quality of the coating and ensure The effect of normal operation and extended service life

Active Publication Date: 2016-10-12

XIXIA LONGCHENG SPECIAL MATERIALS CO LTD

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AI-Extracted Technical Summary

Problems solved by technology

However, practice shows that the research on nickel-boron alloy prepared by electroplating method in this paper is not completely applicable to the preparation of copper plat...

Method used

Cooperate the sulfosalicylic acid that adds 0.10~0.20g/L in the electroplating solution of the present invention, can improve the stability of electroplating solution, strengthen the surface smoothness and corrosion resistance of crystallizer copper plate.

The present invention is preferred, and described electroplating solution also comprises: benzyl-alkenyl pyridine internal salt 0.008~0.012g/L, propynyl alcohol 0.015~0.035g/L, allyl sodium sulfonate 1.0~2.0mg /L. On the basis of the above-mentioned electroplating solution of the present invention, by adding the above-mentioned three kinds of additive combinations, a large number of experiments and practices have shown that under the condition of not changing the method for preparing nickel-boron alloy, the additive combination of the present invention can be used on the copper plate substrate. A nickel-boron alloy layer with good bonding force, good toughness, bright, smooth and uniform is plated. Among them, the use of benzyl-alkenylpyridine int...

Abstract

The invention belongs to the technical field of surface treatment electroplating, and particularly relates to a method for preparing a nickel-boron alloy coating on a continuous casting crystallizer copper plate surface. The method comprises the following step: carrying out nickel-boron alloy electroplating on a pretreated copper plate substrate, wherein the electroplating solution is composed of 30-80 g/L nickel sulfamate, 30-50 g/L boric acid, 0.8-16 g/L sodium borohydride, 30-60 g/L ethylenediamine and 0.01-0.1 g/L sodium dodecylsulfate; and the electroplating conditions are as follows: the pH value of the electroplating solution is 3.5-4.5, the temperature is 45-65 DEG C, the copper plate substrate is the cathode, nickel pellets are the anode, and the current density is controlled at 1-3 A/dm<2>. The method can be used for obtaining the coating which has the advantages of high compactness and uniformly, excellent binding force, low thermal crack tendency, high hardness, excellent corrosion resistance and excellent wear resistance.

Technology Topic

Dodecylsulfonic acidCraquelure +15

Image

Examples

Experimental program(9)
Comparison scheme(2)
Effect test(1)

Example Embodiment

[0035] Example 1

[0036] The method for preparing the nickel-boron alloy coating on the surface of the copper plate of the continuous casting crystallizer in this embodiment, the specific steps are as follows:

[0037] Step S1, pretreatment: cleaning the machined copper plate with an organic solvent, sandblasting, electrolytic degreasing, ultrasonic cleaning and acid activation treatment to obtain the base material of the copper plated plate;

[0038] Step S2, electroplating: inject the electroplating solution into the electroplating tank, adjust the pH of the electroplating solution to 4.0, heat the electroplating solution, and raise the temperature to 55° C., then put the base material of the plate to be copper-plated as the cathode into the electroplating tank, and put Put the anode into the electroplating tank, turn on the power and start electroplating, until the thickness of the nickel-boron alloy coating reaches the set value, the electroplating ends;

[0039] Step S3, post-processing: the electroplated copper plate is treated after leaving the tank, including stripping, dehydrogenation, grinding, surface treatment, packaging, and the continuous casting mold copper plate with electroplated nickel-boron alloy coating is obtained.

[0040] In the present embodiment, the composition of electroplating solution is:

[0041] Nickel sulfamate 60g/L, boric acid 40g/L, sodium borohydride 5g/L, ethylenediamine 42g/L, sodium dodecylsulfonate 0.06g/L.

[0042] The electroplating conditions are as follows: the pH value of the electroplating solution is 4.0, the temperature is 55°C, the copper plate substrate is the cathode, the nickel beads are the anode, and the current density is controlled at 2.0A/dm 2.

[0043] The mass fraction of boron in the nickel-boron alloy obtained by the method of this embodiment is 3.8%.

Example Embodiment

[0044] Example 2

[0045] In the method for preparing a nickel-boron alloy coating on the surface of a continuous casting crystallizer copper plate in this embodiment, the composition of the electroplating solution and the electroplating conditions are the same as in Example 1, steps S1 to S2 are the same as in Example 1, and step S3 also includes:

[0046] Place the electroplated copper plate in a vacuum furnace with a vacuum degree of 6.67×10 -3 Pa, heat treatment at 400°C for 4h.

[0047] The mass fraction of boron in the nickel-boron alloy obtained by the method of this embodiment is 4.2%.

Example Embodiment

[0048] Example 3

[0049] In the method for preparing the nickel-boron alloy coating on the surface of the continuous casting crystallizer copper plate of the present embodiment, the composition of the electroplating solution is:

[0050] Nickel sulfamate 60g/L, boric acid 40g/L, sodium borohydride 5g/L, ethylenediamine 42g/L, sodium dodecylsulfonate 0.06g/L, benzyl-alkenylpyridine inner salt 0.010g/L L, propynyl alcohol 0.025g/L, sodium allyl sulfonate 1.5mg/L;

[0051] The pH value of the electroplating solution is 4.0, the temperature is 55°C, the copper substrate is the cathode, the nickel beads are the anode, and the current density is controlled at 2.0A/dm 2.

[0052] The specific preparation method is the same as in Example 2, and will not be repeated. The mass fraction of boron in the nickel-boron alloy obtained by the method of this embodiment is 4.5%.

PUM

Property	Measurement	Unit
Average wear	<= 0.15	mm
Hardness	>= 800.0

Description & Claims & Application Information

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Example Embodiment

Example Embodiment

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