CN1023328C - 铁基高铬稀土双相钢 - Google Patents

铁基高铬稀土双相钢 Download PDF

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CN1023328C
CN1023328C CN 90104566 CN90104566A CN1023328C CN 1023328 C CN1023328 C CN 1023328C CN 90104566 CN90104566 CN 90104566 CN 90104566 A CN90104566 A CN 90104566A CN 1023328 C CN1023328 C CN 1023328C
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CN1053488A (zh
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寇生瑞
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Abstract

铁基高铬稀土双相钢是利用中高碳、高铬、低镍、含微量钼、钒、稀土的配方,使合金获得奥氏体铁素体、碳化物共存的双相组织,用于制造锅炉喷燃气火嘴与现用钢对比,在1100~1300℃高温下使用,具有良好的耐高温性能,耐磨性能,冷热疲劳性能,及可焊性,显著提高了材料的使用寿命。

Description

本发明涉及一种改进的铁基高铬稀土双相钢,尤其用于火力发电厂的大型锅炉喷燃器火嘴。
至今,国内火力发电厂用于制造锅炉喷燃器火嘴用钢,一般都采用1Cr18Ni9Ti耐热钢板制成,其使用寿命仅为3000小时左右,还达不到主机设备一个小修期5000小时的要求。因此,国产锅炉喷燃器火嘴随炉配件材料仍然没有得到解决。近年来,国内一些科研院、所及厂家,对国产锅炉喷燃器火嘴等随炉配件进行了研究,中国专利申请号85102472公开的高温耐热铁基合金钢,由于碳、锰、镍含量配比不佳,导致钢材韧性低,可焊性能、耐高温性能差,经不起冷、热疲劳,容易烧损和变形。用这种钢材制成的配件实际使用寿命最高为5000~6000小时,材料不能满足使用要求。
为了改进材料性能,提高使用寿命,火力发电厂曾从国外引进产品,其使用表明,钢材的耐热、耐磨性能差,冶铸工艺苛刻。这项研究工作,经国内有关厂家几次试验,由于钢材的耐高温性能差,使用几十小时就熔化在炉内。
鉴于上述情况,本发明的目的是克服现有技术的不足之处,提供一种改进的耐高温,寿命长的铁基高铬稀土双相钢,用于制造喷燃器火嘴配件。
这个任务按本发明可以这样解决,改进的钢种是利用中、高碳、高铬、低镍、含钼、钒、稀土的成份配方,使合金获得奥氏体、铁素 体、碳化物共存的双相组织,其组成重量的百分比是:
C:0.4-1.3    Si:0.4-1.05    Mn:0.4-1.6    S≤0.030
P≤0.035    Cr:26-28    Ni:1.0-5.5
Mo:0.4-0.6    V:0.15-0.35    0<RE≤0.2其余为铁。
按本发明钢材最佳成份配比的重量百分比是:
C:0.4-0.5    Si:0.4-0.6    Mn:0.4-0.6    S≤0.030
P≤0.035    Cr:26-28    Ni:4.0-4.5
Mo:0.4-0.6    0<RE≤0.2其余为铁。
其中稀土是包头1#稀土硅铁合金,出钢后在钢包中外加0.2%。本发明的铁基高铬稀土双相钢,用于制造大型锅炉喷燃器火嘴与现有用钢对比,具有如下优点:(1)耐高温(1100-1300℃)性能好、抗烧损、氧化性能强。(2)高温(1100-1300℃)耐磨性能好,能长期经受高温下煤粉、热风混合气流的冲刷,磨损甚微。(3)冷热疲劳性能好,经过停启炉100余次,无裂纹和变形。(4)可焊性能好,钢材焊前不予热,焊后不回火,焊接口无裂纹。(5)钢材冶铸工艺简便,在铸态下具有良好的加工性能。
实施例1:
经包头第二热电厂410t/h,乌拉山发电厂410t/h及丰镇发电厂670t/h等国产锅炉上考核运行,使用寿命达到20000小时,比1Cr18Ni9Ti钢材使用寿命提高10倍。从而满足了火力发电厂锅炉喷燃器火嘴装炉两年内不更换,提高了使用寿命,保证一个大修期。为我国高温耐热材料用钢增加了新的品种。
实施例2:
为山西神头一电厂研制的国外引进的670t/h锅炉喷燃器火嘴取代原有钢材,经装炉考核,其寿命提高一倍,使该厂670t/h锅炉喷燃器火嘴备件全部国产化。

Claims (2)

1、一种制造火电厂锅炉喷燃器火嘴的铁基高铬稀土双相钢,其特征在于:它的成份为(重量%):
C∶0.4---1.3   Si∶0.4---1.05  Mn∶0.4---1.6  S≤0.030
P≤0.035       Cr∶26---28     Ni∶1.0---5.5
Mo∶0.4---0.6  V∶0.15--0.35   O<RE≤0.2  其余为铁。
2、按权利要求1所说的铁基高铬稀土双相钢,其特征在于:其最佳配比重量百分比是:
C:0.4-0.5  Si:0.4-0.8  Mn:0.4-0.6  S≤0.030
P≤0.035  Cr:26-28  Ni:4.0-4.5
Mo:0.4-0.6  0<RE≤0.2其余为铁。
CN 90104566 1990-07-09 1990-07-09 铁基高铬稀土双相钢 Expired - Fee Related CN1023328C (zh)

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CN 90104566 CN1023328C (zh) 1990-07-09 1990-07-09 铁基高铬稀土双相钢

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CN 90104566 CN1023328C (zh) 1990-07-09 1990-07-09 铁基高铬稀土双相钢

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CN1023328C true CN1023328C (zh) 1993-12-29

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100355932C (zh) * 2005-08-26 2007-12-19 寇生瑞 一种铁基稀土高铬耐热、耐磨、又可焊钢
US9534281B2 (en) 2014-07-31 2017-01-03 Honeywell International Inc. Turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same
US9896752B2 (en) 2014-07-31 2018-02-20 Honeywell International Inc. Stainless steel alloys, turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same
US10316694B2 (en) 2014-07-31 2019-06-11 Garrett Transportation I Inc. Stainless steel alloys, turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1333098C (zh) * 2005-06-24 2007-08-22 寇生瑞 新型铁基稀土高铬钢叶轮叶片
CN101831512B (zh) * 2009-03-13 2013-09-18 上海喜若飞精细化工有限公司 复合功能复鞣剂及其制备方法
CN103436815B (zh) * 2013-08-31 2015-02-18 郭玉宝 耐热耐磨钢及采用这种耐热耐磨钢的干熄焦机出焦底板

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100355932C (zh) * 2005-08-26 2007-12-19 寇生瑞 一种铁基稀土高铬耐热、耐磨、又可焊钢
US9534281B2 (en) 2014-07-31 2017-01-03 Honeywell International Inc. Turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same
US9896752B2 (en) 2014-07-31 2018-02-20 Honeywell International Inc. Stainless steel alloys, turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same
US10316694B2 (en) 2014-07-31 2019-06-11 Garrett Transportation I Inc. Stainless steel alloys, turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same

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