Shipbuilding Industry

We have developed innovative know-how and techniques that we are transferring to our customers of the shipbuilding industry to help them in the improvement of the quality, durability and reliability of their constructions.

We specialize in the following services for shipbuilding industry

Failure analysis

Study of components and welded joints to determine the cause of its failure during manufacturing or in-service life.

Moreover, we offer the rigorous analysis of redesigns or improvement treatments to maximize the quality of the component or welded joint, avoiding the failure to occur again.

Possibility of designing inspection plans to ensure the structural integrity of components or welded joints similar to that presents the failure.

Naval - Análisis de fallo

Metallurgical analysis

Preparation of samples in situ or in laboratory and posterior analysis and interpretation of the material microstructure; detecting metallurgical risks (brittle phases, softening, cold cracking, etc.), degrees of deterioration, etc.

If necessary, we offer studies of local or global treatments that modify the microstructure to obtain an optimal response in service.

Possibility of performing metallurgical and mechanical reverse engineering studies to determine the WPS with which a component has been welded.

Prediction of metallurgical phases by numerical simulation of the essential WPS variables.

Micrografía KHISGROUP

Advanced Quality Control

Our company offers support for quality control, evaluation of degrees of deterioration and even the determination of mechanical properties of in-service components, which have already expended part of their service life.

We also offer an exclusive technique that allows to map the mechanical properties of welds, even through all the sub-zones of the HAZ, ensuring the excellence of quality and providing qualitative evidence to the customer, even in conditions of manufacture or work in aggressive environments of hydrogen.

This service also entails significant time and cost savings when comparing the quality between different materials or manufacturing processes (i.e welding patterns).

Implementation and evaluation of all types of NDT, as well as advice to launch inspection campaigns.

Design of inspection plans

Design of inspection plans according to criteria of maximum exigency in the assurance of the structural integrity.

The plan is designed based on an advanced knowledge of the newest inspection and monitoring technologies available in the market.

We offer a rigorous analysis of the results obtained, through advanced methods of fracture mechanics, with the aim of designing preventive or corrective actions.

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Design of welding tools and temporary elements

We design specific tools for welding in light precision boilers, medium and heavy boilers.

We use innovative tools, simulating the manufacturing process and the welds, controlling and optimizing the deformation and stress state of welded components.

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Design and validation of welded joints by means of innovative techniques

By means of advanced and exclusive techniques of simulation of welding processes, we design the parameters and create welding modes that maximize the quality of the joint (metallurgy, mechanical properties, residual stresses, etc.).

We validate these designs experimentally by means of new microanalysis techniques of the welded joint and every sub-region of the HAZ.

Moreover, we design prewelding and postwelding heat and mechanical treatments that maximize the quality of the welded joint, even once it has already been done in the workshop, minimizing for example the effects of unfavorable residual stresses or eliminating the problems of cold delayed cracking, hot cracking, decarburization, pitting, corrosion, etc.

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Hydrogen embrittlement and cold cracking

Experience in all types of cold cracking tests, including the measurement of diffusible and residual hydrogen.

We have innovative techniques to analyse the phenomenon of hydrogen embrittlement by using very small samples of material.

This way, we obtain quickly and economically the response of our customers’ products to this phenomenon, even being able to analyse at a microdetailed level the mechanical behaviour of the heat affected zones of welded joints.

Hydrogen assisted cracking

Improvement of welded joints and components

Our advanced industrial knowledge of welding and its processes, prewelding, postwelding, heat treatments, mechanical treatments and surface treatments allow us to help our clients for the most suitable setup of their variables, optimizing the quality and the mechanical behavior of components and welds.

We quantify our improvements by means of innovative experimental techniques, as well as numerical simulations, validated in the most recent industrial R&D projects.

We have the suitable partners for providing the treatments we design, offering a global solution to our customers.

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Optimization of welding sequences

We optimize welding sequences using exclusive numerical techniques.

We correlate the simulation results with experimental data of laboratory-welded coupons.

This way, we obtain and validate the best welding sequences guaranteeing minimum cost, maximum quality and design requirements.

know-how innovative solutions - weld simulation

Finite Element Analysis (FEA)

Experience in the simulation of all types of industrial processes, including welding, heat treatments, forming and surface treatments.

Numerical models are validated by means of advanced experimental techniques, developed and tested in an industrial context, increasing the reliability of the simulations.

Our simulation services allow our customers to reduce both launching times and manufacturing costs and to eliminate unexpected non-quality costs.

All type of structural numerical simulation is also offered, including fatigue calculations, optimization of geometries, materials and thicknesses, etc.

We use high quality commercial simulation tools, but also subroutines and exclusive software developed by our spin-off.

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Solution to problems during manufacturing or in-service life

Experience and innovative techniques to solve problems produced during the manufacture or service of components and structures of the shipbuilding sector.

In addition to provide a safe and economical solution in the short term, we analyze the cause of the problem and propose improvements in the production process so that the failure is not repeated.

Evaluation, control and reduction of residual stresses

We evaluate experimentally and simulate with high precision the residual stresses induced by the manufacturing process.

If necessary, we propose solutions for its relaxation and improve reliability (stress relief by vibrations, prewelding and postwelding heat treatments, soakings, etc.).

residual stress khisgroup