High-wear-resistance high-frequency induction welded steel pipe raw material steel and preparation method and application thereof

A high-frequency induction welding, high wear-resistance technology, applied in the field of steel rolling, can solve the problems of easy cracking, inability to make pipes, and cannot be applied to the pipe-making industry, etc., to improve wear resistance and significantly increase the rate of work hardening. Effect

Active Publication Date: 2020-07-28
SHOUGANG CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For high-frequency induction welded steel pipe raw materials, martensite and bainite structures cannot meet the requirements of the pipe industry. On the one hand, due to the high strength and hardness of martensite and bainite structures, it is impossible to make pipe On the other hand, the quality inspection after pipe making is carried out by flattening test, but due to the poor plasticity of martensite and bainite, cracking problems are prone to occur

Method used

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  • High-wear-resistance high-frequency induction welded steel pipe raw material steel and preparation method and application thereof

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Comparison scheme
Effect test

Embodiment 1

[0071] Embodiment 1: Preparation of high-frequency induction welded steel pipe according to the present invention

[0072] 1. Preparation of high-frequency induction welded steel pipe raw material steel with high wear resistance according to the present invention

[0073] (1) Add molten iron to converter smelting and continuous casting to obtain continuous casting billets, wherein; in terms of mass percentage, the continuous casting billets include: C 0.15%, Mn 0.5%, P≤0.008%, S≤0.005%, Al 0.03%, Nb 0.03%, V0.03%, the rest is Fe and unavoidable impurities;

[0074] (2) Heating the continuous casting steel slab described in step (1) to 1100° C., and keeping it warm for 120 minutes;

[0075] (3) Roughly rolling the continuous casting slab obtained in step (2) to obtain an intermediate slab; coiling the intermediate slab to obtain an intermediate steel coil; decoiling the intermediate steel coil, and then performing finish rolling , to obtain strip steel; in this step, when t...

Embodiment 2

[0089] Embodiment 2: Preparation of high frequency induction welded steel pipe according to the present invention

[0090] 1. Preparation of high-frequency induction welded steel pipe raw material steel with high wear resistance according to the present invention

[0091] (1) Put molten iron into the converter for smelting and continuous casting to obtain continuous casting steel slabs, wherein; in terms of mass percentage, the continuous casting steel slabs include: C 0.20%, Si 0.05%, Mn 1.3%, P≤0.008%, S≤ 0.005%, Al 0.04%, Nb0.08%, V 0.1%, the rest is Fe and unavoidable impurities;

[0092] (2) Heating the continuous casting billet described in step (1) to 1200° C., and keeping it warm for 150 minutes;

[0093] (3) Roughly rolling the continuous casting slab obtained in step (2) to obtain an intermediate slab; coiling the intermediate slab to obtain an intermediate steel coil; decoiling the intermediate steel coil, and then performing finish rolling , to obtain strip ste...

Embodiment 3

[0107] Embodiment 3: Preparation of high-frequency induction welded steel pipe according to the present invention

[0108] 1. Preparation of high-frequency induction welded steel pipe raw material steel with high wear resistance according to the present invention

[0109] (1) Put molten iron into converter for smelting and continuous casting to obtain continuous casting billet, wherein; by mass percentage, the continuous casting billet contains: C 0.16%, Mn 0.5%, P≤0.008%, S≤0.005%, Al 0.03%, Nb 0.04%, V0.04%, the rest is Fe and unavoidable impurities;

[0110] (2) Heating the continuous casting steel slab described in step (1) to 1100° C., and keeping it warm for 120 minutes;

[0111](3) Roughly rolling the continuous casting slab obtained in step (2) to obtain an intermediate slab; coiling the intermediate slab to obtain an intermediate steel coil; decoiling the intermediate steel coil, and then performing finish rolling , to obtain strip steel; in this step, when the in...

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Abstract

The invention provides high-wear-resistance high-frequency induction welded steel pipe raw material steel and a preparation method thereof. The high-wear-resistance high-frequency induction welded steel pipe raw material steel comprises the following components in percentage by mass: 0.15-0.20% of C, 0-0.05% of Si, 0.5-1.3% of Mn, not greater than 0.008% of P, not greater than 0.005% of S, 0.03-0.04% of Al, 0.03-0.08% of Nb, 0.03-0.10% of V, and the balance Fe and inevitable impurities. The high-wear-resistance high-frequency induction welded steel pipe raw material steel has such advantages as easy formation, easy welding and high machining hardening degree; and in addition, the wear resistance of a welded steel pipe and a carrier roller prepared by the high-wear-resistance high-frequencyinduction welded steel pipe raw material steel in service is further improved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel rolling, and in particular relates to a raw material steel for high-frequency induction welding steel pipes with high wear resistance, its preparation method and its application. Background technique [0002] As the pipe-making technology of high-frequency induction welded steel pipes continues to mature, the application of high-frequency induction welded steel pipes continues to expand, and is widely used in the fields of automobiles, coal, engineering machinery, petrochemicals, and steel structures. In terms of the use of high-frequency induction welded steel pipes, in addition to being used as static structural parts, they can also be used as dynamic load-bearing parts, such as automobile drive shaft shaft tubes, mechanical bulging axle housings, belt conveyors Roller rollers, etc. Among them, the high-frequency induction welded steel pipe used as some dynamic bearing parts must not onl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C21D8/02C22C33/04
CPCC21D8/0205C21D8/0226C21D8/0263C22C33/04C22C38/02C22C38/04C22C38/06C22C38/12Y02P10/20
Inventor 惠亚军周杰崔阳于洪河李飞田志红陈斌刘锟肖宝亮吴科敏关平冯宝卓周娜徐伟王丽萍崔德涛
Owner SHOUGANG CORPORATION
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