HP耐热钢结焦、渗碳的原因分析

中国腐蚀与防护学报

2002, Vol. 22

Issue (5): 286-289

研究报告

本期目录 | 过刊浏览

HP耐热钢结焦、渗碳的原因分析

李处森;杨院生;吴欣强

中科院金属所

ANALYSIS OF COKING AND CABURIZING OFHP HEAT-RESISTANT STEEL

Chusen Li;Yuansheng Yang;Xinqiang Wu

中科院金属所

全文: PDF(169 KB)

摘要: 对退役HP耐热钢裂解炉管结焦、渗碳状况进行了分析，藉加速结焦实验研究了耐热钢的初期结焦行为，推断出催化结焦促进结焦和渗碳的机制.

关键词 ： HP耐热钢, 催化结焦, 渗碳

Abstract：This paper deals with the coking and caburizing of the used cracking tube made by HP heat-resistant steel.The experiments show that the structure on the cross-section of the used cracking tube is consisted of th e oxide and coking layer,the chromium depletion layer,and the inner carburized la yer due to serious carburizing.It is found that there is filamentary coke near t he surface of the tube but the spherical coke exists far from the surface of the tube.The initial coking behaviour of HP heat-resistant steel is investigated by quick coking experiment.During the initial coking stage,the filamentary is form ed under the catalytic action of nickel or iron elements in the steel,although t here is a Cr2O3 film on the surface of the steel.The hydrocarbon cracking in termediates can permeate the Cr2O3 film and combine with the nickel or iron elements in the steel,which arouses the catalytic coking,and causes the destruct ion of the Cr2O3 film and serious coking and carburizing.With increasing of the cracking time,the spherical coke begins to develop instead of the catalytic filamentary coke.

Key words： HP heat-resistant steel catalytic coke caburization

收稿日期: 2001-02-04

ZTFLH:

O621.25+4.2

通讯作者: 李处森

Corresponding author: Chusen Li

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引用本文:

李处森; 杨院生; 吴欣强 . HP耐热钢结焦、渗碳的原因分析[J]. 中国腐蚀与防护学报, 2002, 22(5): 286-289 .
Chusen Li, Yuansheng Yang, Xinqiang Wu. ANALYSIS OF COKING AND CABURIZING OFHP HEAT-RESISTANT STEEL. J Chin Soc Corr Pro, 2002, 22(5): 286-289 .

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2002/V22/I5/286

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