Laser Heat Treatment of Steels and Alloys before Diffusion Welding

IF 0.3 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Inorganic Materials: Applied Research Pub Date : 2025-07-15 DOI:10.1134/S2075113325700558

Yu. V. Khomich, V. A. Yamshchikov

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Abstract

The article describes the results of experimental studies on diffusion welding under conditions of hot isostatic pressing with preliminary heat treatment of the surface of workpieces made of a number of steels and alloys by nanosecond pulses of laser ultraviolet radiation. Estimates of the characteristics of laser radiation and the parameters of the modified surface layer due to its melting by a laser pulse are given. It is shown that the processing of samples from a heat-resistant nickel-based alloy CrNi55MoWZr by a scanning beam of nanosecond laser pulses with a wavelength of 355 nm, a duration of 10 ns, and an energy density of 2 J/cm², following at a frequency of 100 Hz, improved the mechanical properties of the weld. The ultimate strength increased by 10%, and the elongation increased by 20%. In addition, the use of a laser made it possible to reduce the temperature of the diffusion welding process by 160°C while maintaining the mechanical properties of the welded joint. The most probable reason for the improvement of the properties of the welded joint was the appearance of low-temperature superplasticity caused by the formation of a fine-grained surface structure because of preliminary laser processing of workpieces.

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扩散焊前钢和合金的激光热处理

本文介绍了在热等静压条件下，用纳秒脉冲激光紫外辐射对几种钢和合金制成的工件表面进行初步热处理的扩散焊接试验研究结果。给出了激光辐射特性的估计和由于激光脉冲熔化而引起的改性表面层的参数。结果表明，在波长为355nm、持续时间为10ns、能量密度为2j /cm2、频率为100hz的纳秒激光脉冲下对耐热镍基合金CrNi55MoWZr试样进行扫描处理，可改善焊缝的力学性能。极限强度提高10%，延伸率提高20%。此外，激光的使用使扩散焊接过程的温度降低了160°C，同时保持了焊接接头的机械性能。焊接接头性能改善的最可能原因是由于工件经过初步的激光加工，形成了细小的表面组织，从而导致了低温超塑性的出现。

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来源期刊

Inorganic Materials: Applied Research Engineering-Engineering (all)

CiteScore

0.90

自引率

0.00%

发文量

199

期刊介绍： Inorganic Materials: Applied Research contains translations of research articles devoted to applied aspects of inorganic materials. Best articles are selected from four Russian periodicals: Materialovedenie, Perspektivnye Materialy, Fizika i Khimiya Obrabotki Materialov, and Voprosy Materialovedeniya and translated into English. The journal reports recent achievements in materials science: physical and chemical bases of materials science; effects of synergism in composite materials; computer simulations; creation of new materials (including carbon-based materials and ceramics, semiconductors, superconductors, composite materials, polymers, materials for nuclear engineering, materials for aircraft and space engineering, materials for quantum electronics, materials for electronics and optoelectronics, materials for nuclear and thermonuclear power engineering, radiation-hardened materials, materials for use in medicine, etc.); analytical techniques; structure–property relationships; nanostructures and nanotechnologies; advanced technologies; use of hydrogen in structural materials; and economic and environmental issues. The journal also considers engineering issues of materials processing with plasma, high-gradient crystallization, laser technology, and ultrasonic technology. Currently the journal does not accept direct submissions, but submissions to one of the source journals is possible.