退火对激光熔覆AlSi10Mg/40%WC涂层组织及性能的影响

宋旭祥; 李骁; 冯馨毅; 王文平

doi:10.13568/j.cnki.651094.651316.2025.01.24.0002

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退火对激光熔覆AlSi10Mg/40%WC涂层组织及性能的影响

更新时间：2026-01-21

- 退火对激光熔覆AlSi10Mg/40%WC涂层组织及性能的影响
- Journal of Xinjiang University (Natural Science Edition in Chinese and English) Vol. 42, Issue 5, Pages: 561-573(2025)
- 作者机构：
  
  1. 新疆大学智能制造现代产业学院
  2. 新疆大学材料科学与工程学院
- 作者简介：
- 基金信息：
- DOI：10.13568/j.cnki.651094.651316.2025.01.24.0002
  CLC： TG174.4;TG665;TG156.2
- Published：2025
- 稿件说明：
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[1]宋旭祥,李骁,冯馨毅,等.退火对激光熔覆AlSi10Mg/40%WC涂层组织及性能的影响[J].新疆大学学报(自然科学版中英文),2025,42(05):561-573.
[1]宋旭祥,李骁,冯馨毅,等.退火对激光熔覆AlSi10Mg/40%WC涂层组织及性能的影响[J].新疆大学学报(自然科学版中英文),2025,42(05):561-573. DOI： 10.13568/j.cnki.651094.651316.2025.01.24.0002.

DOI：10.13568/j.cnki.651094.651316.2025.01.24.0002.

摘要

基于激光熔覆技术在SiCp/2009Al基材表面制备AlSi10Mg/40%WC涂层，研究200℃、250℃、300℃退火处理对涂层微观组织及力学性能的影响．通过XRD、SEM、EDS等表征手段分析发现：退火处理促进Si元素析出，涂层各元素分布均匀性提高，且物相组成未变．XRD衍射峰随温度升高左移，表明晶格畸变程度逐步缓解．力学性能测试显示：250℃-2 h退火后涂层显微硬度降至238.65 HV(降幅15.9%)，断裂韧度KIC值提升至31.28 MPa·m1/2(增幅17.1%)，磨损失重由4.58 mg降至3.84 mg(降幅16.2%)，摩擦系数稳定在0.30±0.02．相比之下，300℃退火虽使KIC值略增至31.37MPa·m1/2，但硬度显著下降(223.16 HV)且Si相粗化导致磨损失重增至7.42 mg，耐磨性有所降低．因此，250℃-2h退火处理能够实现硬度与韧性的协同优化，显著提升该复合涂层的综合性能，为高性能涂层的制备提供参考．

Abstract

This study employs laser cladding technology to fabricate AlSi10Mg/40%WC coatings on SiCp/2009Al substrates

systematically investigating the effects of annealing treatments at 200℃

250℃C

and 300℃(for 2hours) on the microstructure and mechanical properties.Analysis by XRD

SEM

and EDS reveals that annealing facilitated Si precipitation and enhanced the uniformity of elemental distribution throughout the coating

while the phase composition remains unchanged.A progressive leftward shift in XRD diffraction peaks with increasing annealing temperature indicates reduced lattice distortion.Mechanical evaluations demonstrate that 250℃-2 h annealing decreased microhardness to 238.65 HV(15.9% reduction) while increasing fracture toughness(KIC) to31.28 MPa·m1/2(17.1% improvement).Wear performance analysis shows a 16.2% reduction in mass loss(decreased from 4.58 mg(unannealed) to 3.84 mg) and a stabilized friction coefficient around 0.30±0.02.Comparatively

while300℃ annealing achieves a slightly higher KIC enhancement(31.37 MPa·m1/2)

it results in significant hardness degradation(to 223.16 HV) and increased wear loss(to 7.42 mg)

attributed to Si phase coarsening.The 250℃-2h annealing treatment achieves a synergistic optimization of hardness

toughness

and wear resistance

providing critical theoretical insights for developing high-performance laser clad composite coatings.

关键词

Keywords

references

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