コベルコ溶接テクノ List of Products and Services

The "reproduction thermal cycle test" is a method to replicate the thermal cycles experienced by the heat-affected zone of the base material and the multi-layer welded metal when welding is performed. It is used to investigate changes in the properties of the base material and to evaluate the phase transformation behavior of the resulting welded metal. The testing equipment used for the reproduction thermal cycle test not only applies thermal cycles but can also apply tensile or compressive forces during heating and cooling. In this case, it is possible to evaluate the strength, hot workability, and crack resistance of metallic materials during high-speed processing at high temperatures. 【Measurement Items】 ■ Reproduction thermal cycle of the weld ■ High-temperature high-speed tensile test ■ High-temperature high-speed compression test ■ Processing heat treatment test *For more details, please refer to the PDF document or feel free to contact us.

• Analytical Equipment and Devices
• Contract Inspection

The "Varestraint Test" is one of the tests used to investigate the susceptibility to welding cracks that occur at high temperatures. This test involves applying instantaneous bending deformation to a test plate that is molten with a TIG welding torch, forcing high-temperature cracks to occur in the molten bead. It allows for the evaluation of solidification cracks and liquefaction cracks due to re-heating separately. It is used for comparing the crack resistance of welding materials and selecting welding conditions, and by changing the bending radius of the jig (strain amount) or measuring the crack temperature range of the test piece, cracks can be quantitatively evaluated. [Test Items] ■ High-temperature crack susceptibility of the welded joint *For more details, please refer to the PDF document or feel free to contact us.

• Analytical Equipment and Devices
• Defect Inspection Equipment
• Contract Inspection

Image analysis is a method that processes digital images captured by optical microscopes or electron projectors using computer technology to measure parameters such as the number, area, and length of particles. At our company, by innovating the etching method, we have achieved high contrast coloring applied only to the ferrite phase of duplex stainless steel, enabling the measurement of ferrite content through image analysis. This method can be completed in a shorter time compared to the point counting method for measuring ferrite content, and it eliminates human error, reducing variability. For more details, please refer to the PDF document or feel free to contact us.

• Contract Analysis
• Other measurement, recording and measuring instruments

The "Soil Abrasion Test" is an examination that investigates the abrasion phenomenon known as scratching wear, where the surface is worn away by hard protrusions or foreign objects. Specifically, a certain amount of silica sand is poured onto the contact surface between the test piece and a rotating rubber wheel, and the amount of wear loss and the surface condition of the test piece that has been worn away are measured and observed. Materials that are prone to wear, such as plastics, show a large amount of wear loss, while wear-resistant materials like tool steel show a smaller amount of wear loss. The "High-Temperature Friction and Wear Test" is a test that examines the degree of wear by rubbing test pieces against each other while rotating. This can be conducted from room temperature to high temperatures, and the mass difference of the test pieces before and after the test is used to measure the worn mass (wear loss) and friction torque. [Test Items] ■ Soil Abrasion Test ◎ Measurement of wear loss ◎ Observation of surface condition ■ High-Temperature Friction and Wear Test ◎ Wear loss ◎ Friction torque ◎ Measurement of the actual temperature of the test piece (disk) during the test *For more details, please refer to the catalog or feel free to contact us.

• Testing Equipment and Devices
• Analytical Equipment and Devices

The "Technical Data on Welding, Testing, and Investigation" is a collection of technical materials provided by Shinko Welding Services, which conducts welding tests, material tests, and analysis/physical tests based on extensive experience and high-level technology. It introduces numerous evaluation tests such as "Material Testing," which assesses material strength, hardness, and wear resistance, and "Physical and Material Property Testing," which clarifies the state of substances by measuring and observing slight changes or minute areas in response to physical actions. [Contents (Excerpt)] ■ Tensile Test ■ Charpy Impact Test ■ Hardness Test ■ Abrasion Test ■ High-Temperature Friction and Wear Test *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices

The "Transmission Electron Microscope (TEM)" irradiates a sample with a high-voltage electron beam and obtains transmission electron images and electron diffraction patterns by magnifying the electrons that have passed through the sample using electromagnetic lenses. In transmission electron images, features such as grain boundaries, defects, strain, and the presence of precipitates can be observed, while electron diffraction patterns allow for the identification of crystalline materials and the analysis of crystal orientation. 【Features】 ■ Observation at magnifications from 1,000 to 1,000,000 times ■ Element identification in ultra-micro regions through EDS analysis (qualitative and semi-quantitative analysis of elements from C to U) ■ Identification of crystalline materials and analysis of crystal orientation *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices

The "Erosion Wear Test" is an examination that investigates the wear phenomenon known as scratching wear, where the surface is abraded by hard protrusions or foreign objects. Specifically, a certain amount of silica sand is poured onto the contact surface between the test specimen and a rotating rubber wheel, and the wear loss of the test specimen's surface and its surface condition are measured and observed. Materials that are prone to wear, such as plastics, show a large wear loss, while wear-resistant materials like tool steel show a small wear loss in measurements. [Test Items] ■ Measurement of wear loss ■ Observation of surface condition *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices

"Electron Probe Micro Analyzer (EPMA) analysis" involves directing a finely focused electron beam onto a sample and detecting the characteristic X-rays emitted from that area, allowing us to clarify which elements are present and their distribution state at the irradiated location (sample surface). It targets foreign substances such as general metal materials and corrosion products, observing the surface at magnifications ranging from 40 to 30,000 times. [Analysis Items] ■ Surface observation at 40 to 30,000 times magnification ■ Identification of constituent elements in micro-regions (qualitative and semi-quantitative analysis of elements from Be to U) ■ Line analysis ■ Area analysis, color map analysis *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices

A "Scanning Electron Microscope (SEM)" is a device that irradiates and scans a finely focused electron beam on a sample, detects secondary and backscattered electrons, and displays their intensity as an image on a monitor to obtain magnified images of the object. Although it is not suitable for high magnification observation due to reduced image quality, it can use low vacuum mode, allowing for non-coating observation of difficult-to-conduct samples. [Observation Items] ■ Surface observation at magnifications of 5 to 300,000 times ■ Elemental analysis (B to U) using an energy-dispersive X-ray spectrometer (EDS) as an accessory ■ Element identification in micro-regions (qualitative and semi-quantitative analysis) *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices

The "High-Temperature Friction and Wear Test" is a test that examines the degree of wear by rubbing test pieces against each other while rotating them. It can be conducted from room temperature to high temperatures, and the mass difference of the test pieces before and after the test is used to measure the worn mass (wear loss) and friction torque. 【Inspection Items】 ■ Wear Loss ■ Friction Torque ■ Measurement of the actual temperature of the test pieces (discs) during the test *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices

The "hardness test" involves pressing a diamond or similar indenter into the surface of the test specimen and calculating the hardness value based on the diagonal length (area) or depth of the indentation created in the specimen. It is a general-purpose test that can be performed relatively easily, and from the obtained measurements, one can infer the tensile strength, crack resistance, wear resistance, and machinability of materials and welded joints. [Test Items] ■ Vickers hardness test (HV) ■ Rockwell hardness test (HR) ■ Brinell hardness test (HB) *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices

The "tensile test" measures the elongation of a specimen and the force required until it breaks by pulling the specimen in one axial direction at a specified speed. By conducting a tensile test, the mechanical properties of materials and welded joints can be determined, such as yield strength, tensile strength, and elongation. [Test Items] ■ Yield Strength ■ Yield Point ■ Tensile Strength ■ Elongation ■ Reduction of Area ■ Fracture Location ■ Fracture Surface Observation *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices

Metallic microstructure testing, such as "macro and micro organizational observation," includes macrostructure testing using the naked eye or low magnification magnifiers (up to about 20 times) and microstructure testing that observes fine structures not discernible to the naked eye (up to about 1000 times). Macrostructure testing examines relatively broad areas for homogeneity or defects, while microstructure testing is a method that investigates a narrow range in detail at high magnification. 【Examples of Application (Excerpt)】 ■ Determining the suitability of welding construction by measuring leg length and observing the fusion state of welds ■ Observing inclusions and segregation in metallic materials ■ Investigating the presence of notches or defects in the cross-section of mechanical structures or damaged areas ■ Investigating erosion depth and corrosion patterns by observing the cross-section of corroded areas ■ Observing plating thickness, carburizing layer, and decarburization layer depth *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices

The "Charpy impact test" is a test that examines the toughness of a material by applying an impact with a hammer to a notched specimen and measuring the energy absorbed by the impact. Additionally, when observing the fracture surface after the impact, there are brittle and ductile fracture surfaces. By measuring the brittle fracture ratio, which is the ratio of the brittle fracture surface area to the original specimen cross-sectional area, for impact test specimens conducted at various temperatures, the fracture transition temperature can be determined. [Test Items] ■ Impact value (absorbed energy) ■ Brittle and ductile fracture ratio ■ Transition temperature ■ Lateral expansion *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices

The "creep test and creep rupture test" continuously apply a low tensile force below the yield point (strength) to a specimen at a constant high temperature, measuring strain and rupture time to evaluate material properties. Tests that measure strain are called creep tests, while those that do not measure strain are referred to as creep rupture tests. By parameterizing the deformation behavior, it is possible to predict the creep rupture life. [Test Items] ■ Creep Test: Strain-time diagram (creep curve), rupture time, rupture elongation, rupture reduction ■ Creep Rupture Test: Rupture time, rupture elongation, rupture reduction *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices

"X-ray photoelectron spectroscopy (XPS) analysis" involves irradiating the sample surface with soft X-rays and measuring the binding energy of the emitted photoelectrons. It allows for the examination of the elements and composition of the sample (qualitative and semi-quantitative analysis) as well as the chemical states of the elements (state analysis). The information detected pertains to the extreme surface layer of the sample (a few nanometers), and by combining it with Ar ion sputtering, depth profiling measurements can also be conducted. Since the excitation source is soft X-rays, it is possible to measure samples that are non-conductive. [Applicable Targets] ■ Metals in general ■ Ceramics ■ Semiconductors ■ Thin films ■ Films *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices

The "X-ray diffraction apparatus" is a device used to investigate the crystal structure, or the name of the material, by measuring the angles and intensities of the diffracted X-rays. From the diffraction positions and integrated intensities during qualitative analysis, quantitative analysis for each material can also be performed using the Rietveld refinement method. Additionally, measurements can be conducted at high temperatures (typically from room temperature to 1300 °C). 【Test Items】 ■ Identification of crystal structure and quantitative analysis ■ Measurement of lattice size and lattice strain ■ Quantitative analysis of environmental dust *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices

The "FE-SEM (Field Emission Scanning Electron Microscope)" is a device that irradiates and scans a finely focused electron beam onto a sample, allowing for clearer magnified images compared to general-purpose SEMs. Additionally, by utilizing a finely focused strong electron beam and employing the Electron Back-Scatter Diffraction (EBSD) method, it is possible to analyze crystal orientation and crystal structure. 【Applicable Targets】 ■ General metal materials ■ Ceramics ■ Fibers (requires deposition treatment) *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices
• Electron microscope

The "CTOD (Crack Tip Opening Displacement) test" is one of the tests used to evaluate the fracture toughness of structures with defects. When a specimen with a crack is held at a specified temperature and subjected to bending forces, a phenomenon called "unstable fracture" occurs, where the crack rapidly propagates. This test measures the crack tip opening displacement (CTOD value) just before the crack begins to propagate rapidly. 【Applicable Targets】 ■ Welded joints of carbon steel ■ Welded joints of low alloy steel ■ Welded joints of high-strength steel ■ Welded joints of low-temperature steel *For more details, please refer to the catalog or feel free to contact us.

• Analytical Equipment and Devices

Our company conducts 'PMI inspections' using fluorescent X-ray analysis. You can choose between 'in-house inspections' where you send the inspection materials, or 'on-site inspections' where we dispatch technicians from our company. This method allows for non-destructive checks of welding wires, steel materials, and welding metals, as well as verifying whether the welding materials used were appropriate. It is ideal for preventing contamination, defects, and corrosion in various industries such as metal processing, machinery manufacturing, and piping. ★ We are currently offering a 'Welding Test Case Collection' featuring a wealth of investigation examples! 【Applicable Targets】 ■ Steel materials such as carbon steel, low alloy steel, and stainless steel ■ Ni-based alloys such as Inconel, Hastelloy, and Incoloy ■ Cu alloys such as pure copper, brass, bronze, nickel silver, and Monel ■ Other materials such as Ti alloys and Co-based alloys *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

• Other inspection equipment and devices
• X-ray fluorescence analyzer
• Contract Inspection

At Shinko Welding Services, we conduct automotive testing and research such as "welding and joining specimen production" and "welding characteristic investigation" based on our extensive experience and high-level technology grounded in technical know-how. For more details, please refer to our catalog or feel free to contact us.

• Other Auto Parts
• Contract measurement

The technical document "Joining Research Examples" provides information on the "Scrum Rivet MIG Welding Method," which involves drilling holes in the iron of the upper plate for the application of aluminum alloys in automobiles and performing MIG welding with Al wire over those holes. The "Scrum Rivet MIG Welding Method" is based on MIG welding and can be performed with simple equipment. It has features such as the ability to disregard the formation of Fe-Al intermetallic compounds, offering advantages compared to other dissimilar material welding methods. For more details, please refer to the catalog or feel free to contact us.

• Steel
• aluminum
• Other Auto Parts

Residual stress is one of the causes of stress corrosion cracking, reduced fatigue strength, and brittle fracture in structures and various processed components. Therefore, understanding residual stress and implementing appropriate structural design, metal processing, and construction management are essential for ensuring the reliability of structures and various processed components. The "MIRS Method High-Precision Internal Residual Stress Measurement Service" is a measurement method using high-precision deep hole drilling. 【Features】 ■ Measurement is possible even for specimens with a thickness of 100mm or more. ■ There are few shape constraints, allowing measurement of complex shapes. ■ Positioning is controlled by machine control, enabling control with an accuracy of ±1μm. ■ Measurement is possible with just drilling at the measurement position and trepanning. Short delivery times and cost reduction. *For details, please request materials or view the PDF data from the download.

• Contract measurement

The "Residual Stress Measurement Solution Service" is an internal residual stress measurement method (MIRS method) that can meet diverse needs with high quality. It enables high-precision measurement of internal residual stress using deep hole drilling methods. Additionally, we also conduct surface residual stress measurements and the fabrication of welded test specimens for measurement purposes. This service can be utilized for confirming peening effects, validating FEM analysis results, and studying crack propagation behavior. 【Features】 ○ High precision ○ Low cost ○ Short delivery time ○ Responds to diverse needs For more details, please contact us or download the catalog.

• Other inspection equipment and devices
• Contract Inspection

Shin-Ko Welding Service Co., Ltd. is a company that provides testing, research, analysis, and welding training related to the welding and joining of metal materials, based on the extensive experience and high-level technology cultivated over many years at Kobe Steel, a top manufacturer in the welding industry. We strive to be a close partner to our customers, always aiming to be of service. 【Business Activities】 - Testing and research of metal materials - Environmental surveys and measurements - Welding training For more details, please contact us or download our catalog.

• Contract measurement