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Bimetal mechanical composite wear-resistant steel tube and production method thereof

A bimetallic and mechanical technology, applied in the direction of mechanical equipment, pipes, rigid pipes, etc., can solve the problems of not meeting the ideal requirements of wear-resistant steel pipes, reducing material toughness and impact resistance, and achieving high fatigue resistance and low manufacturing costs. The effect of low and long service life

Inactive Publication Date: 2011-09-14
唐勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] However, for the same material, hardness, wear resistance, toughness, and impact resistance are contradictory. Requiring sufficiently high hardness, strength, and wear resistance will inevitably be at the expense of reducing the toughness and impact resistance of the material.
Although supersonic frequency or high-frequency induction heating and quenching can control the thickness of the hardened layer, keep the incompletely hardened part to maintain a certain toughness, and improve the overall performance of the material; use ordinary mechanical composite methods to make the outer layer ordinary low-carbon The steel material is used as the support layer to solve the safety problem under pressure and pressure pulsation conditions; but it still cannot meet the ideal requirements of wear-resistant steel pipes

Method used

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  • Bimetal mechanical composite wear-resistant steel tube and production method thereof
  • Bimetal mechanical composite wear-resistant steel tube and production method thereof
  • Bimetal mechanical composite wear-resistant steel tube and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) material selection

[0045] The outer layer 1 is made of low-carbon steel hot-rolled seamless steel pipe, steel number: 20 Specifications (mm): Φ133×4.5 Length (mm) 4700; the inner layer 2 is made of high-carbon chromium bearing steel GCr15 hot-rolled seamless steel pipe and spheroidized annealed , specification (mm): Φ127×4.5 length (mm): 5700;

[0046] 20 Steel composition: C 0.17~0.24%, Si 0.17~0.37%, Mn 0.35~0.65%, P≤0.025%, S≤0.025%;

[0047] GCr15 composition: C 0.95~1.05%, Si 0.15~0.35%, Mn 0.25~0.45%, P≤0.025%, S≤0.025%, Cr1.4-1.65%;

[0048] (2) Billet tube preparation

[0049] A. On the lathe, the outer layer of 20 steel hot-rolled seamless steel pipe is cut and processed to clamp the process head, and then the surface is treated (pickling-phosphating-saponification), and after two passes of cold drawing to the design size (mm): Φ131. 5×2-10000;

[0050] B. On the lathe, the inner GCr15 hot-rolled seamless steel pipe is cut and processed to clamp the p...

Embodiment 2

[0060] (1) material selection

[0061] The outer layer 1 is made of low-carbon carbon structural steel hot-rolled seamless steel pipe, steel number: Q235B specification (mm): Φ140×6 length (mm) 7700; the inner layer 2 is made of high-carbon chromium bearing steel GCr15 hot-rolled seamless steel pipe and Spheroidizing annealing, specification (mm): Φ127×4.5 length (mm): 7000;

[0062] Q235B composition: C 0.12~0.20%, Si 0.10~0.30%, Mn 0.30~0.70%, P≤0.045%, S≤0.045%;

[0063] GCr15 composition: C 0.95~1.05%, Si 0.15~0.35%, Mn 0.25~0.45%, P≤0.025%, S≤0.025%, Cr1.4-1.65%;

[0064] (2) Billet tube preparation

[0065] A. On the lathe, the outer Q235B hot-rolled seamless steel pipe is cut and processed to clamp the process head, and then the surface treatment (pickling-phosphating-saponification) is carried out, and the design size (mm) is reached after one pass of cold drawing: Φ138.5× 4.5-10000;

[0066] B. On the lathe, the inner layer GCr15 hot-rolled seamless steel pipe is ...

Embodiment 3

[0076] (1) material selection

[0077] The outer layer 1 is made of low-alloy structural steel hot-rolled seamless steel pipe, steel number: Q345B Specification (mm): Φ219×12 length (mm) 8300; the inner layer 2 is made of high-carbon chromium bearing steel GCr15 hot-rolled seamless steel pipe and spheroidized Annealing, specification (mm): Φ194×7 length (mm): 6900;

[0078] Q345B composition: C 0.15~0.20%, Si 0.35~0.55%, Mn 1.00~1.60%, V 0.02~0.15%, P≤0.025%, S≤0.025%;

[0079] GCr15 composition: C 0.95~1.05%, Si 0.15~0.35%, Mn 0.25~0.45%, P≤0.025%, S≤0.025%, Cr1.4-1.65%;

[0080] (2) Billet tube preparation

[0081] A. On the lathe, the outer Q345B hot-rolled seamless steel pipe is cut and processed to clamp the process head, and then the surface treatment (acid

[0082] Washing-phosphating-saponification), after one cold drawing to the design size (mm): Φ219×9.5-10000, inner diameter 200;

[0083] B. On the lathe, the inner GCr15 hot-rolled seamless steel pipe is cut and...

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Abstract

The invention discloses a bimetal mechanical composite wear-resistant steel tube and a production method thereof. The invention is characterized in that: the bimetal mechanical composite wear-resistant steel tube has an outer layer (1) serving as a base layer and an inner layer (2) serving as a clad layer, wherein the base layer and the clad layer are mechanically compounded; and the clad layer is made of bearing steel and the base layer is made of low-carbon steel or low-alloy steel. In bimetal mechanical combination, the inner and outer layers of steel tubes are tightly adhered through cold drawing, hot drawing, cold rolling, spinning, hot charging, cold charging, jacking and other means; therefore, the bimetal mechanical composite wear-resistant steel tube with the advantages of excellent wear resistance, high impact load resistance, high corrosion resistance, long service life and high safety performance under the pressure fluctuation working conditions is obtained.

Description

technical field [0001] The invention relates to a bimetal mechanical composite wear-resistant steel pipe and a production method thereof, belonging to the field of metal mechanical composite processing. Background technique [0002] The currently used wear-resistant steel pipe materials are mainly divided into the following types: [0003] 1) Medium and high carbon carbon structural steel materials (GB / T699-1999); [0004] Medium and high carbon carbon structural steel mainly has 45, 50, 55, 60, 65, 40Mn, 45Mn, 50Mn and other materials. The medium-high carbon structural steel pipe is heated and quenched by super-audio frequency or high-frequency induction in the inner hole, and the hardness of the hardened layer on the inner surface can reach HRC55-60, which has certain wear resistance. , mud, slag and other media, but the service life is short and the safety is poor. Taking concrete as an example, the service life is generally only 0.8-1.2 million cubic meters, and the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/02F16L57/06B23P15/00
Inventor 唐勇
Owner 唐勇