Stainless steel/carbon steel composite pipe and manufacturing process thereof

A production process, stainless steel technology, applied in the direction of manufacturing tools, pipes/pipe joints/fittings, pipes, etc., can solve the problems of temperature control, surface quality, production efficiency, etc., to improve Su Song (shrinkage cavity) and segregation, and avoid irregularities The effect of shape and inner wall smoothness

Active Publication Date: 2020-05-19
青岛力晨新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problems of temperature control, surface quality and production efficiency in the process of composite pipe solid-liquid composite pouring, it is particularly critical to develop a new type of carbon steel / stainless steel solid-liquid composite pouring equipment

Method used

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  • Stainless steel/carbon steel composite pipe and manufacturing process thereof
  • Stainless steel/carbon steel composite pipe and manufacturing process thereof
  • Stainless steel/carbon steel composite pipe and manufacturing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A manufacturing process of stainless steel / carbon steel composite pipe, comprising the following steps:

[0049] (1) Surface treatment of the base pipe

[0050] Take a carbon steel pipe, finish the inner wall of the base pipe, and then process a joint surface with roughness. Iron filings during processing can be recycled.

[0051] (2) Preheating of the base pipe

[0052] The base pipe is transported to a heating furnace and preheated in an inert atmosphere or a reducing atmosphere to reach the preheating temperature required for casting. Preheating includes the following specific process: first use the heating furnace to preheat the internal environment of the furnace body and then preheat the base pipe. The warm-up time is 10h.

[0053] (3) Pouring

[0054] Transfer the base pipe to the pouring area, then lift the ceramic mold to the inner bottom of the base pipe and center it, a pouring cavity is formed between the ceramic mold and the base pipe, and the The ste...

Embodiment 2

[0059] A manufacturing process of stainless steel / carbon steel composite pipe, comprising the following steps:

[0060] (1) Surface treatment of the base pipe

[0061] Take a carbon steel pipe, finish the inner wall of the base pipe, and then process a joint surface with roughness. Iron filings during processing can be recycled.

[0062] (2) Preheating of the base pipe

[0063] The base pipe is transported to a heating furnace and preheated in an inert atmosphere or a reducing atmosphere to reach the preheating temperature required for casting. Preheating includes the following specific process: first use the heating furnace to preheat the environment inside the furnace body and then preheat the base pipe. The warm-up time is 0.1h.

[0064] (3) Pouring

[0065] Transfer the base pipe to the pouring area, then lift the ceramic mold to the inner bottom of the base pipe and center it, a pouring cavity is formed between the ceramic mold and the base pipe, and the The steel l...

Embodiment 3

[0070] A manufacturing process of stainless steel / carbon steel composite pipe, comprising the following steps:

[0071] (1) Surface treatment of the base pipe

[0072] Take a carbon steel pipe, finish the inner wall of the base pipe, and then process a joint surface with roughness. Iron filings during processing can be recycled.

[0073] (2) Preheating of the base pipe

[0074] The base pipe is transported to a heating furnace and preheated in an inert atmosphere or a reducing atmosphere to reach the preheating temperature required for casting. Preheating includes the following specific process: first use the heating furnace to preheat the internal environment of the furnace body and then preheat the base pipe. The warm-up time is 5h.

[0075] (3) Pouring

[0076] Transfer the base pipe to the pouring area, then lift the ceramic mold to the inner bottom of the base pipe and center it, a pouring cavity is formed between the ceramic mold and the base pipe, and the The stee...

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Abstract

The invention discloses a manufacturing process of a stainless steel / carbon steel composite pipe. The manufacturing process comprises the following steps that the inner surface (namely the inner wall)of a base layer pipe is subjected to finishing to obtain a good bonding surface state to prepare for subsequent fusion, and roughness processing is carried out on the inner wall of the base layer pipe so that the base layer pipe and a composite layer can be tightly bonded together, the area of the bonding surface is increased, and therefore the bonding strength between the composite layer and a base layer is increased. According to the manufacturing process of the stainless steel / carbon steel composite pipe, the composite layer is obtained by pouring a pouring liquid with the same material asthe composite layer, and the composite layer is formed through the base layer pipe and a ceramic mold arranged in the base layer pipe; in the pouring process, according to the manufacturing process,the ceramic mold is moved upwards at the same time, so that the ceramic mold continuously extrudes the pouring liquid injected from the top, the pouring liquid can be rapidly cooled through the mode that a cooling system at the bottom of the ceramic mold is combined, and therefore the composite layer is obtained through shaping; and the manufacturing process is high in automation degree, a large amount of manual operation is not needed, and product stability and production efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of composite pipe preparation, in particular to a stainless steel / carbon steel composite pipe and a manufacturing process thereof. Background technique [0002] Bimetallic composite material is a new type of material prepared by combining two metals with different properties through various composite technologies. And rigidity, so that it can obtain the comprehensive performance that a single component metal cannot match, and it is more suitable for the increasingly high requirements of the rapid development of industry and technology for materials. [0003] The stainless steel composite pipe combines a layer of layered composite material with high corrosion resistance stainless steel on the carbon steel or low alloy steel pipe with a certain process to adapt to the high corrosion environment, and at the same time greatly saves the amount of expensive stainless steel and significantly reduces production cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16C21D9/08F16L9/02
CPCB22D19/0081B22D19/16C21D9/08C21D9/085F16L9/02
Inventor 杨岩张家泉郑震兰鹏王浩李根马晓威史婉丽董延楠
Owner 青岛力晨新材料科技有限公司
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