Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation method of a wear-resistant steel plate for mining machinery, and the prepared wear-resistant steel plate has the characteristics of high strength, good wear resistance and the like.
In order to solve the problems, the technical scheme of the invention is as follows:
a preparation method of a wear-resistant steel plate for mining machinery comprises the following components in percentage by weight:
c: 0.5-0.6%, Si: 0.4-0.6%, W: 0.1-0.2%, V: 0.2 to 0.3%, Zr: 0.6-0.8%, Mo: 0.4-0.5%, Mn: 1.2 to 1.5 percent of Ti, 0.4 to 0.5 percent of Ti, less than or equal to 0.015 percent of P, less than or equal to 0.01 percent of S, and the balance of Fe and inevitable impurities;
the preparation method comprises the following steps:
smelting, smelting and adjusting the content of components, and controlling the tapping temperature to 1480-1520 ℃;
casting, cooling the molten steel and casting into a blank;
rolling, heating the blank to 1180-1200 ℃, wherein the initial rolling temperature is 1100-1150 ℃, and the temperature rise speed is controlled to be 10-15 ℃/s; the final rolling temperature is 870-; cooling to 350-400 ℃ after rolling;
and (3) performing heat treatment, wherein the quenching temperature is 920-950 ℃, the tempering heat preservation temperature is 200-230 ℃, and the heat preservation time is 2-4 h.
Further, the preparation method of the wear-resistant steel plate for the mine comprises the following steps:
smelting, smelting and adjusting the component content, and controlling the steel-producing temperature to be 1500 ℃;
casting, cooling the molten steel and casting into a blank;
rolling, heating the blank to 1200 ℃, wherein the initial rolling temperature is 1150 ℃, and the heating speed is controlled to be 15 ℃/s; the finishing temperature is 890 ℃, and the temperature rising speed is controlled to be 10 ℃/s; cooling to 350 ℃ after rolling;
and (4) performing heat treatment, wherein the quenching temperature is 920 ℃, the tempering heat preservation temperature is 200 ℃, and the heat preservation time is 2-4 h.
Further, the preparation method of the wear-resistant steel plate for mining machinery comprises the following components in percentage by weight:
c: 0.6%, Si: 0.6%, W: 0.1%, V: 0.3%, Zr: 0.8%, Mo: 0.5%, Mn: 1.2 percent of Ti, less than or equal to 0.5 percent of P, less than or equal to 0.015 percent of S, and the balance of Fe and inevitable impurities.
The preparation method of the wear-resistant steel plate for the mining machinery further comprises the following components in percentage by weight:
c: 0.5%, Si: 0.4%, W: 0.2%, V: 0.2%, Zr: 0.6%, Mo: 0.4%, Mn: 1.5 percent of Ti, less than or equal to 0.4 percent of P, less than or equal to 0.015 percent of S, and the balance of Fe and inevitable impurities.
The preparation method of the wear-resistant steel plate for mining machinery provided by the invention has the beneficial effects that: by optimizing the alloy material components of the wear-resistant steel plate and optimizing the temperature conditions of each process, the prepared wear-resistant steel plate for mining machinery has the characteristics of high hardness and good wear resistance, and the Brinell hardness value can reach 630-640 HB.
Detailed Description
The following description of the present invention is provided to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention and to make the above objects, features and advantages of the present invention more comprehensible.
It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The wear-resistant steel plate for the mining machinery comprises the following components in percentage by weight:
c: 0.6%, Si: 0.6%, W: 0.1%, V: 0.3%, Zr: 0.8%, Mo: 0.5%, Mn: 1.2 percent of Ti, less than or equal to 0.5 percent of P, less than or equal to 0.015 percent of S, and the balance of Fe and inevitable impurities.
The preparation method of the wear-resistant steel plate for mining machinery of the embodiment comprises the following steps:
(1) smelting, smelting and adjusting the component content, and controlling the steel-producing temperature to be 1500 ℃;
(2) casting, cooling the molten steel and casting into a blank;
(3) rolling, heating the blank to 1200 ℃, wherein the initial rolling temperature is 1150 ℃, and the heating speed is controlled to be 15 ℃/s; the finishing temperature is 890 ℃, and the temperature rising speed is controlled to be 10 ℃/s; cooling to 350 ℃ after rolling;
(4) and (4) performing heat treatment, wherein the quenching temperature is 920 ℃, the tempering heat preservation temperature is 200 ℃, and the heat preservation time is 2-4 h.
The wear-resistant steel sheet for mining machinery of the present example had a hardness of 630 HB.
Example 2
The wear-resistant steel plate for the mining machinery comprises the following components in percentage by weight:
c: 0.5%, Si: 0.4%, W: 0.2%, V: 0.2%, Zr: 0.6%, Mo: 0.4%, Mn: 1.5 percent of Ti, less than or equal to 0.4 percent of P, less than or equal to 0.015 percent of S, and the balance of Fe and inevitable impurities.
The preparation method of the wear-resistant steel plate for mining machinery of the embodiment comprises the following steps:
(1) smelting, smelting and adjusting the component content, and controlling the steel-producing temperature to 1480 ℃;
(2) casting, cooling the molten steel and casting into a blank;
(3) rolling, wherein the blank is heated to 1180 ℃, the initial rolling temperature is 1100 ℃, and the heating speed is controlled to be 10 ℃/s; the finishing temperature is 870 ℃, and the heating speed is controlled to be 5 ℃/s; cooling to 380 ℃ after rolling;
(4) and (4) performing heat treatment, wherein the quenching temperature is 950 ℃, the tempering heat preservation temperature is 230 ℃, and the heat preservation time is 2 hours.
The abrasion resistant steel sheet for mining machinery of the present example had a hardness of 635 HB.
Example 3
The wear-resistant steel plate for the mining machinery comprises the following components in percentage by weight:
c: 0.6%, Si: 0.5%, W: 0.2%, V: 0.3%, Zr: 0.7%, Mo: 0.5%, Mn: 1.3 percent of Ti, less than or equal to 0.4 percent of P, less than or equal to 0.015 percent of S, and the balance of Fe and inevitable impurities.
The preparation method of the wear-resistant steel plate for mining machinery of the embodiment comprises the following steps:
(1) smelting, smelting and adjusting the component content, and controlling the steel temperature to 1520 ℃;
(2) casting, cooling the molten steel and casting into a blank;
(3) rolling, wherein the blank is heated to 1190 ℃, the initial rolling temperature is 1130 ℃, and the heating speed is controlled to be 12 ℃/s; the final rolling temperature is 880 ℃, and the temperature rising speed is controlled to be 8 ℃/s; cooling to 400 ℃ after rolling;
(4) and (4) performing heat treatment, wherein the quenching temperature is 930 ℃, the tempering heat preservation temperature is 220 ℃, and the heat preservation time is 4 hours.
The wear-resistant steel sheet for mining machinery of the present example had a hardness of 640 HB.
The preparation method of the wear-resistant steel plate for mining machinery provided by the invention has the beneficial effects that: by optimizing the alloy material components of the wear-resistant steel plate and optimizing the temperature conditions of each process, the prepared wear-resistant steel plate for mining machinery has the characteristics of high hardness and good wear resistance, and the Brinell hardness value can reach 630-640 HB.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and alterations to these embodiments will occur to those skilled in the art without departing from the spirit and scope of the present invention.