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Alloy material for tertiary air pipe of petrochemical industrial furnace and its application

A technology of alloy materials and industrial furnaces, which is applied in the field of alloy materials for tertiary air ducts of petrochemical industrial furnaces, can solve the problems of short service life and replacement cycle, increased production costs, and easy melting, so as to reduce the dependence on imported materials, Superior milling performance and the effect of promoting healthy development

Active Publication Date: 2018-05-11
江苏双勤新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

HK40 is a medium-carbon heat-resistant steel with good high-temperature working ability, but the tertiary air duct made of HK40 is prone to melting and perforation after more than one year of use, and the service life and replacement cycle are short, resulting in production costs. Increase

Method used

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  • Alloy material for tertiary air pipe of petrochemical industrial furnace and its application
  • Alloy material for tertiary air pipe of petrochemical industrial furnace and its application
  • Alloy material for tertiary air pipe of petrochemical industrial furnace and its application

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Embodiment

[0014] Preparation has as attached figure 1 The specific dimensions of the petrochemical industrial furnace tertiary air duct with the structure shown are as follows: L1=1046mm, L2=418mm, A=560mm, B=E=355mm, C=D=305mm, R=10mm.

[0015] 1. Mold making

[0016] Make wooden molds according to product dimensions;

[0017] For molding, the cavity size is determined according to the product's external dimensions. The internal diameter of the cavity is the product's external dimensions plus a 3mm margin, air holes are made, the shape is repaired, and cold iron is placed. The molding material is ordinary molding sand;

[0018] The inner core is made, the size of the inner core is φ302mm, the inner core is placed, and the position of the inner core is fixed; the inner core material is resin sand, which is made of 4% resin by weight (purchased from Suzhou Kelong Chemical Co., Ltd., KPJ-L8850 resin), 1 weight % curing agent (purchased from Suzhou Kelong Chemical Co., Ltd., the curing a...

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Abstract

The invention discloses an alloy material used for a petrochemical industrial furnace tertiary air duct. The alloy material comprises the following chemical components in percentage by weight: 0.35-0.45% of C, 26.0-30.0% of Cr, 38.0-42.0% of Ni, 14.0-17.0% of W, 1.0-2.5% of Si, less than or equal to 2.0% of Mn, 1.5-3.0% of Nb, 0.5-1.5% of Ce, 0-0.015% of S, less than or equal to 0.015% of P and the balance of Fe. Compared with HK40, the tertiary air duct prepared from the alloy material shows more excellent mechanical property and hardness under normal temperature and high temperature, and has better scouring resistance and longer service in the application, so that the replacing times can be obviously reduced, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of inorganic alloy materials, and in particular relates to an alloy material used for a tertiary air duct of a petrochemical industrial furnace and its application. Background technique [0002] The working medium of the tertiary air duct of the petrochemical industrial furnace is air and granular calcined petroleum coke, and the working temperature is usually 1200-1350°C. At present, the material of this type of tertiary air duct is mostly imported HK40, and its chemical composition is (mass percentage): C0.35-0.45%, Si 0.5-2.0%, Mn≤1.50%, Cr 23.0-27.0%, Ni 19.0- 22.0%, Mo≤0.50%, P≤0.04%, S≤0.04%, Fe balance. HK40 is a medium-carbon heat-resistant steel with good high-temperature working ability, but the tertiary air duct made of HK40 is prone to melting and perforation after more than one year of use, and the service life and replacement cycle are short, resulting in production costs. Increase. Content...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00
CPCC22C30/00C22C38/005C22C38/02C22C38/44C22C38/48C22C38/58
Inventor 李勤峰
Owner 江苏双勤新能源科技有限公司