激光相变硬化
激光相变硬化的相关文献在1981年到2022年内共计137篇,主要集中在金属学与金属工艺、无线电电子学、电信技术、自动化技术、计算机技术
等领域,其中期刊论文119篇、会议论文7篇、专利文献250180篇;相关期刊77种,包括福建农林大学学报(自然科学版)、广西工学院学报、精密成形工程等;
相关会议5种,包括2008年中国机械工程学会年会暨甘肃省学术年会、2008轧辊制造与应用国际研讨会、第十五届全国激光学术会议等;激光相变硬化的相关文献由289位作者贡献,包括邱星武、周建忠、徐洪烟等。
激光相变硬化—发文量
专利文献>
论文:250180篇
占比:99.95%
总计:250306篇
激光相变硬化
-研究学者
- 邱星武
- 周建忠
- 徐洪烟
- 李刚
- 袁国定
- 韩彬
- 刘丽
- 刘宁
- 吴钢
- 王勇
- 王慧萍
- 冯爱新
- 况军
- 刘永镇
- 吴东江
- 奚文龙
- 姚建华
- 宋光明
- 庄娟
- 张光钧
- 戴凤阳
- 戴建强
- 桂中祥
- 相珺
- 邓宗钢
- 邱玲
- 雷声
- 骆有东
- 余满江
- 刘书华
- 刘伟平
- 刘全坤
- 吴成萌
- 吴立
- 吴跃波
- 周志明
- 姜卓
- 孙加林
- 孙友宏
- 巴米莱
- 张准胜
- 张国栋
- 张国梁
- 张宏
- 张富巨
- 张建国
- 张成龙
- 张立文
- 徐国秀
- 徐小煜
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孙茜;
邸洪双;
李峻臣
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摘要:
A Nb-Ti-Mo micro-alloyed ultra-high strength hot-rolled low carbon steel was treated by laser induced phase transformation hardening process,using IPG 4 kW fiber laser. The effects of laser power and scanning speed on macroscopic morphology and mirco-hardness were investigated. The microstructure evolution in laser transformation zone was also discussed. The results showed that when the laser power increased or the scanning speed decreased,the width and depth of the laser transformation zone increased. Laser transformation zone can be characterized into three smaller zones in general:micro-melting zone ( MZ ), hardening zone ( HZ ) and transition zone( TZ). In this study,the microstructure in the MZ was ferrite,granular bainite and martensite, whereas the microstructure in the HZ was fully martensite, compared to the microstructure in the TZ which consisted of the relatively finer individual martensite and the structure mixed with ferrite and martensite. The average hardness of the HZ reached 320 HV, which was 30% higher than that of the matrix. The wear resistance of the steel was significantly improved by 30% after the laser treatment.%利用4 kW光纤激光器对一种780 MPa级Nb-Ti-Mo微合金化的低碳钢进行了激光相变强化处理,研究了激光功率和扫描速度对激光相变区宏观形貌和显微硬度的影响,讨论了激光相变区显微组织的演变规律.结果表明:随着激光功率的增加或扫描速度的降低,激光相变区宽度和深度逐渐增加.激光相变区包含三个区域:微熔区、硬化区和过渡区.微熔区显微组织为铁素体、粒状贝氏体和马氏体;硬化区显微组织为全马氏体;过渡区为相对细小的全马氏体或与铁素体的混合组织.在所研究的参数中,硬化区的硬度可超过母材30%左右,平均硬度达到320 HV.实验钢表面耐磨性能提高30%左右.
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胡晓冬;
徐元飞;
姚建华;
于成松
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摘要:
半导体激光器及其工业应用是激光领域研究与发展的热点,国内大功率半导体激光器的发展已经取得了较大进展,但基于国产大功率半导体直接输出激光器的自动化加工装备研究较少。研制了国产大功率半导体直接输出激光加工系统,开发了基于DSP的嵌入式激光加工过程检测与控制系统,设计了用于该系统闭环温度控制的模糊控制算法,并取得了良好的温度控制效果。基于该平台开展了激光宽带相变硬化实验,实验表明:在温度控制模式下,相变硬化层深度和硬度的一致性要优于恒定功率模式。%Semiconductor lasers and their industrial applications are research focus in laser field, the development of domestic high power semiconductor lasers has made great progress, but the research on automated processing equipment based on domestic high power semiconductor direct output lasers is few. A laser processing equipment was developed which was based on domestic high power direct output semiconductor lasers. DSP-based embedded control system was also developed for laser processing measurement and control, and fuzzy control algorithm was designed for closed-loop temperature control, and a desirable temperature control effect was acheved. Wideband laser transformation hardening experiments on this platform show that, the consistency of depth and hardness of the transformation hardening layer are better in the temperature control mode contrast to that in the constant power mode.
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王慧萍;
雍学超;
冷培榆;
严敏杰
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摘要:
采用HL-5000型横流CO2激光加工机,应用宽带技术,选择合适的激光工艺参数,对QT600-3球墨铸铁和40CrMo电梯绳轮进行了激光相变硬化处理.研究了球墨铸铁和40CrMo激光淬火后显微组织的变化,球墨铸铁绳轮基体的显微组织为珠光体、铁素体和球状石墨,激光硬化层的显微组织为石墨球周围一般包围一层等轴状的马氏体和残余奥氏体,其外再围有变态莱氏体层.40CrMo绳轮基体组织为回火索氏体组织,激光硬化层的显微组织为细小马氏体和少量残余奥氏体.测量了淬硬层的性能,淬硬层的硬度可分别达到785HV0.1和767HV0.1,硬化层深度约为0.77 mm和0.75 mm,达到电梯绳轮的技术要求.绳轮实样耐磨性模拟试验表明:激光淬火后耐磨寿命有很大的提高,1987 ~2007年激光表面处理了电梯绳轮约2万只,全部投入装机使用.
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薛鹏;
申强;
潘庆敏
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摘要:
针对抽油泵泵筒同时承受磨损和油气水腐蚀交互作用的现场服役环境,提出激光相变硬化-离子渗氮-渗硫复合改性工艺.在其表面制备一层具有耐磨耐蚀自润滑综合性能的复合改性层,采用XRD、SEM和EPMA等方法对35CrMoA钢激光相变硬化-离子渗氮-渗硫复合改性层进行物相分析、形貌观察和成分分析,并对复合改性层摩擦学性能进行测试.测试结果表明,复合改性层表面由许多球状颗粒相互叠嵌沉积而成,整体平整疏松,局部有小坑;截面由表至里分别为连续的黑色带状硫化物层、白亮层及渗氮扩散层组成,渗硫层厚度在2~4 pm之间,主要物相是FeS和FeS2,渗氮层主要物相为Fe2N、Fe3N、Fe4N和少量Cr2N,白亮层厚度为6~10 μm.复合改性层的摩擦因数在0.70 ~0.80之间,较基体有所降低,磨损失质量也大为降低,约为基体的1/31.
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吴娅梅
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摘要:
本文总结了激光强化处理技术的应用情况,特别是关于冶金领域轧辊强化方面的一些进展,分析了对其进行理论分析的难点所在,并提出了具有一定价值的观点。%this paper summarizes the application of laser hardening processing, especial y some progress about metal urgy rol strengthening, analyzes on the theoretical analysis of the difficulty, and put forward the point of view has a certain value.
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邱星武
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摘要:
目的:为了改善45钢表面状态,提高其表面性能,采用CO2激光器对其表面进行激光相变硬化处理。方法利用带有能谱的扫描电子显微镜( SEM/EDS )、盐雾试验机等,对激光相变硬化层组织及耐蚀性能进行了观察和分析。结果激光相变硬化层由熔化区、相变硬化区和热影响区三部分组成,其组织依次为:混合马氏体+未溶碳化物、针状马氏体、残余奥氏体。随扫描速度增加,耐蚀性先变好而后变差。结论激光相变硬化处理可改善45钢的表面性能,显著提高其耐蚀性能。%In order to improve the surface properties of 45 steel, the laser transformation hardening treatment was car-ried out by CO2 laser on its surface. The microstructure and properties of alloying layer were analyzed by scanning electron microscope with energy spectrum ( SEM/EDS) , salt spray tester, etc. The laser transformation hardening layer was consti-tuted by melting zone, transformation hardened zone and heat affected zone. The microstructure included the mixed mar-tensite plus undissolved carbides, acicular martensite, and retained austenite. With the increase of the scanning speed, the corrosion resistance increased first and then decreased. After laser transformation hardening treatment, the surface proper-ties of 45 steel were improved, which significantly increased the corrosion resistance.
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- 《2008年中国机械工程学会年会暨甘肃省学术年会》
| 2008年
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摘要:
分别考虑试样下底面为自然冷却和强制冷却两种情况,建立了三维有限尺度板状试样激光相变硬化模型.并采用有限单元法,以GCr15钢为例,对激光相变硬化过程进行了三维温度场模拟分析.结果表明:试样厚度对大厚度试样的表层部位温度场影响很小,但对于小厚度试样影响显著;强制冷却可以降低峰值温度,提高冷却速度,有利于硬化层的生成.
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