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A bimetal wear-resistant seamless composite steel pipe and its preparation method

A composite steel pipe and bimetal technology, applied in the direction of pipes, rigid pipes, pipeline protection, etc., can solve the problems of hardness that cannot meet the wear resistance requirements of equipment, Cr metal film falling off, etc., achieve hardness and wear resistance, and solve impact resistance. Problems, the effect of excellent wear resistance

Active Publication Date: 2016-04-20
SICHUAN XINDING NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the steel pipe that is currently used for crushing and grinding equipment for food or medicinal materials and is easily rusted if it is made of complete carbon steel; if it is made of carbon steel plated with Cr metal, the Cr metal film will be ground into Cr powder falls off from the surface of the equipment; if it is made of single-metal 9Cr18MoV stainless steel, it cannot meet the hardness defect required by the equipment for wear resistance. It provides a bimetallic that is not only simple in structure, but also low in cost, and can also meet the requirements of corrosion resistance and wear resistance. Wear-resistant seamless composite steel pipe

Method used

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Embodiment

[0025] The bimetal wear-resistant seamless composite steel pipe of the present invention comprises an inner steel pipe and an outer steel pipe integrally structured with the inner steel pipe. The inner steel pipe is made of 9Cr18MoVNb material, and the weight percentage of each component of the inner steel pipe of the present invention is: C, 0.90-1.10; Mn, ≤0.80; Si, ≤0.80; S, ≤0.03; P, ≤0.04 ; Cr, 16.0-18.0; Mo, 0.40-0.70; V, 0.10-0.25; Nb, 0.04-0.15; the balance is Fe. In order to significantly improve the wear resistance of the inner steel pipe and obtain a longer service life, the present invention optimizes the composition of 9Cr18MoV, and adds a certain amount of Nb on the basis of adjusting the standard composition. The addition of Nb makes the structure of the inner steel pipe material more refined, which can make the hardness of 9Cr18MoV after quenching and tempering higher and more uniform, and can be safely used in food and medicinal material processing equipment. ...

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Abstract

The invention discloses a bimetallic wear-resisting seamless composite steel tube. The bimetallic wear-resisting seamless composite steel tube is characterized by comprising an inner steel tube and an outer steel tube which is metallurgically bonded on the inner steel tube, wherein the outer steel tube is made of a 304 stainless steel material, and the inner steel tube is made of a 9Cr18MoVNb material. The bimetallic wear-resisting seamless composite steel tube is simple in structure and low in cost, and also can satisfy the requirement on corrosion resistance and wear resistance, thereby being suitable for popularization and application.

Description

technical field [0001] The invention relates to a composite steel pipe, in particular to a bimetal wear-resistant seamless composite steel pipe and a preparation method thereof. Background technique [0002] In the traditional food and pharmaceutical industries, steel pipes for crushing and grinding food and medicinal materials are mainly made of three materials. a. Made entirely of carbon steel. The crushing and grinding equipment made of carbon steel will rust after long-term service, and the rust will be mixed into food and medicinal materials, causing pollution. b. Made of carbon steel plated with Cr metal. After the crushing and grinding equipment made of carbon steel plated with Cr has been in service for a long time, the Cr metal film is ground into Cr powder during wear and tear, falls off the surface of the equipment, and is mixed into food (such as flour) or medicine noodles, causing food Or the quality of the medicine is impure, causing serious consequences suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/02F16L57/06C22C38/26C22C38/40C21D6/00C21D9/14
CPCC21D6/002C21D6/004C21D6/005C21D6/008C21D9/14C22C38/02C22C38/04C22C38/18C22C38/22C22C38/24C22C38/26C22C38/40F16L9/02F16L57/06
Inventor 鲍善勤黄晓斌
Owner SICHUAN XINDING NEW MATERIALS
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