张骏,蔡文河,杜双明,董树青,谌康,郑准备.喷丸奥氏体耐热钢抗蒸汽氧化性的研究与使用现状[J].表面技术,2020,49(9):133-140.
ZHANG Jun,CAI Wen-he,DU Shuang-ming,DONG Shu-qing,SHEN Kang,ZHENG Zhun-bei.Research and Application Status of Steam Oxidation Resistance of Shot Peening Austenitic Heat-resistant Steel[J].Surface Technology,2020,49(9):133-140 |
| 喷丸奥氏体耐热钢抗蒸汽氧化性的研究与使用现状 |
| Research and Application Status of Steam Oxidation Resistance of Shot Peening Austenitic Heat-resistant Steel |
| 投稿时间：2019-10-28 修订日期：2020-09-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.09.014 |
| 中文关键词: 火电机组 奥氏体耐热钢 喷丸 氧化皮 抗蒸汽氧化性 |
| 英文关键词:thermal power unit austenitic heat resistant steel shot blasting oxide scale steam oxidation resistance |
| 基金项目: |
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| Author | Institution |
| ZHANG Jun | 1.Northwest Power Technology Research Institute, China Datang Corporation Science and Technology Research Institute, Xi’an 710021, China |
| CAI Wen-he | 2.Thermal Power Technology Research Institute, China Datang Corporation Science and Technology Research Institute, Beijing 100040, China |
| DU Shuang-ming | 2.Thermal Power Technology Research Institute, China Datang Corporation Science and Technology Research Institute, Beijing 100040, China |
| DONG Shu-qing | 2.Thermal Power Technology Research Institute, China Datang Corporation Science and Technology Research Institute, Beijing 100040, China |
| SHEN Kang | 2.Thermal Power Technology Research Institute, China Datang Corporation Science and Technology Research Institute, Beijing 100040, China |
| ZHENG Zhun-bei | 1.Northwest Power Technology Research Institute, China Datang Corporation Science and Technology Research Institute, Xi’an 710021, China |
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| 中文摘要: |
| 奥氏体钢内壁喷丸处理作为一种新的提高材料抗蒸汽氧化性的技术，在超超临界火电机组受热面管的使用越来越广泛和成熟。概述了传统奥氏体钢在蒸汽氧化过程中氧化皮的形成结构，材料临界Cr含量 对富Cr层形成的影响，以及氧化皮结构与临界Cr含量 的关系。奥氏体钢内壁喷丸处理提高抗蒸汽氧化性的机理为：喷丸在管子内表面形成一层微米级厚度的喷丸层，喷丸层中晶粒碎化、晶格畸变、位错增多，在蒸汽氧化过程中，为基体内的Cr原子向表面扩散提供短路通道，使喷丸层表面Cr浓度提高，以形成富Cr层，减小氧化速率，提高抗蒸汽氧化性。归纳得出国内外关于喷丸奥氏体钢与传统钢管在600~750 ℃温度范围内，抗蒸汽氧化性的顺序依次为：600~700 ℃温度下，喷丸SUPER304(S30432)>喷丸TP347H≈喷丸TP321H≈TP310HCbN(HR3C)>SUPER304≈TP347HFG>TP304≈TP347H>TP321H；700~750 ℃下，TP310HCbN(HR3C)>喷丸TP347H>喷丸TP321H。同时归纳了喷丸工艺中，各因素对喷丸效果的影响，喷丸层质量的金相和硬度评价方法，以及目前喷丸奥氏体钢的实际应用现状。最后分析了喷丸奥氏体钢关于加工、焊接以及使用寿命等仍需研究解决的问题，展望了喷丸工艺向马氏体钢的推广使用。 |
| 英文摘要: |
| As a new technology to improve material’s resistance to steam oxidation, shot blasting of austenitic steel inner wall is becoming more and more widespread and mature when used in heated surface tubes of ultra-supercritical thermal power units. The formation of oxide scale structure of traditional austenitic steel during steam oxidation, the influence of material’s critical Cr content on Cr-rich layer formation and the relationship between scale structure and critical Cr content were outlined. The mechanism of austenitic steel shot blasting to improve steam oxidation resistance was: a micron-scale layer was formed on the inner surface of the tube by shot blasting and grain fragmentation, lattice distortion and increased dislocations occurred in the shot blasting layer. During the steam oxidation processing, a short circuit was provided for the diffusion of Cr atoms into the surface, increasing the Cr concentration on the surface of the shot blasting layer to form a Cr-rich layer, reducing oxidation rate and improving steam oxidation resistance. It was summarized that the order of the steam oxidation resistance of shot blasted austenitic steel and traditional steel pipe in the temperature range of 600~750 ℃ at home and abroad was: in the range of 600~700 ℃, shot blasting SUPER304(S30432)>TP310HCbN(HR3C)≈shot blasting TP347H≈shot blasting TP321H> SUPER304≈TP347HFG>TP304≈TP347H>TP321H. In the range of 700~750 ℃, TP310HCbN(HR3C)>shot blasting TP347H>shot blasting TP321H. The effects of various factors on the shot blasting quality in the shot blasting process, the metallographic and hardness evaluation methods for shot blasting quality, and the actual application status of shot blasting austenitic steel were also summarized. Finally, the problems of shot blasting austenitic steel about processing, welding and service life were still to be solved, and the promotional use of shot blasting to martensitic steel was prospected. |
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