Qingdao Tiger Machinery Technology Co., Ltd.

Tensile testing of metallic materials is a fundamental test for obtaining the core mechanical properties of materials, supporting material selection and structural design, and controlling production quality. The core is to measure three key indicators: strength, plasticity, and stiffness.

Testing Objectives (Core Value)

1. Material Performance Evaluation: Quantitatively obtain strength, plasticity, and stiffness, and establish a material mechanical property database.

2. Engineering Design Basis: Provide basic parameters for calculating structural strength, stiffness, and safety factors, ensuring service safety.

3. Process Verification and Optimization: Evaluate the impact of processes such as composition, heat treatment, rolling, forging, and welding on performance, and optimize processes.

4. Quality Control and Acceptance: Incoming/outgoing inspection of production batches to identify performance fluctuations caused by inclusions, segregation, overheating, and other defects.

5. Standards and Certification: Meet national/industry/international standards requirements, supporting product certification and market access.

Magnetic particle inspection (MT) of welds

Inspection Objectives

1. To detect harmful surface and near-surface defects, especially highly sensitive crack-like defects, making it a key means of weld safety inspection.

2. To verify welding quality, checking whether the welding process and operation are up to standard, and preventing the use of defective structures.

3. To ensure structural safety, preventing brittle fracture, fatigue cracking, and leakage accidents in welds under stress, vibration, and pressure conditions.

4. To meet the acceptance requirements of specifications, providing a basis for non-destructive testing acceptance for pressure vessels, pipelines, steel structures, and other projects.

Ultrasonic testing (UT) of welds

Testing Purpose

1. Detection of Internal Weld Defects: Focus on detecting highly hazardous internal defects such as cracks, lack of fusion, and incomplete penetration, compensating for the limitations of magnetic particle and penetrant testing, which can only detect surface defects.

2. Ensure welded structural safety: Prevent sudden fracture, leakage, or failure of welds under stress, pressure, vibration, and fatigue conditions.

3. Welding quality acceptance: Serves as the basis for factory and final acceptance of important structures such as pressure vessels, pressure pipelines, steel structures, ships, and bridges.

4. Process verification and quality control: Inspect welding processes and welder skill levels, and guide process improvement and rework.

Inspection contents and purpose of articulated boom

Inspection Objectives

To achieve high-precision on-site measurement without transporting workpieces to a laboratory, enabling high-precision inspection in the workshop or assembly area, thus improving efficiency.

To verify workpiece machining and welding accuracy, confirming whether dimensions, hole positions, and geometric tolerances conform to drawings and technical requirements, and determining pass/fail status.

To guide assembly and rework, quickly identifying out-of-tolerance areas, providing data basis for tooling adjustments, welding deformation correction, and machining rework.

First-article inspection and quality control are used for first-article inspection of new products and process verification, ensuring consistency in mass production.

Reverse engineering and data archiving collect physical 3D data for modeling, comparison, archiving, and later maintenance.

To replace traditional measuring tools, improving accuracy and reliability; more precise than calipers, dial indicators, and scribers; data is traceable, meeting quality inspection and acceptance requirements.

Metal Hardness Testing Content and Purpose

Testing Purpose

1. Determining Material Strength and Performance: Hardness is highly correlated with strength, allowing for rapid assessment of a material's tensile strength, wear resistance, and toughness.

2. Inspecting heat treatment quality: Verifying whether quenching, tempering, annealing, heat treatment, carburizing, and nitriding processes meet requirements, preventing excessive hardness leading to brittleness or insufficient strength due to softness.

3. Welding quality control: Inspecting the hardness of welds and heat-affected zones to determine the presence of hardened structures and cold cracking tendencies, ensuring the safety of welded joints.

4. Raw material acceptance: Rapidly screening incoming materials to ensure they meet grade requirements, preventing mixed materials and the substitution of inferior materials.

5. Determining processing and failure causes: Used for analyzing workpiece wear, deformation, and fracture failures to determine if failure is due to insufficient or excessive hardness.

6. Rapid on-site quality inspection: Simple, non-destructive or minimally destructive operation, suitable for batch sampling, on-site testing, and finished product acceptance.

Metallographic Testing Content and Purpose of Metals and Welds

Testing Objectives

1. Determine Material and Heat Treatment Quality: Judge whether the material is qualified and whether processes such as quenching/tempering/annealing/normalizing have achieved the expected results through microstructure analysis.

2. Assess Welding Process Rationality: Determine whether hardened or coarse microstructures appear in the weld heat-affected zone, assess crack sensitivity, and optimize welding parameters. Identify Failure Causes: Analyze the microstructure defects of fractured, corroded, worn, and brittle fractured workpieces, and determine the failure mechanism (e.g., fatigue, hydrogen-induced cracking, intergranular corrosion, etc.).

3. Control Metallurgical and Processing Quality: Discover problems such as segregation, inclusions, and overheating generated during smelting, casting, forging, and rolling.

4. Verify Surface Treatment Effects: Determine the layer depth, microstructure, and bonding quality of treatments such as carburizing, nitriding, spraying, and weld overlay.

5. Meet Product Acceptance and Process Qualification: Provide metallographic qualification basis for welding process qualification, pressure vessels, pipelines, steel structures, and aerospace components.

Coating Adhesion Testing Content and Purpose

Testing Purpose

1. Inspect Coating Application Quality: Judge whether surface treatment (rust removal, degreasing, sanding), spraying process, and curing conditions are qualified.

2. Evaluate Coating Reliability: Ensure the coating is not prone to peeling or flaking during use, guaranteeing long-lasting protective effects. 3. Prevent early failure: Avoid coating cracking and peeling due to poor adhesion, resulting in loss of anti-corrosion, decorative, insulating, and wear-resistant functions.

4. Material selection and process verification: Compare the adhesion differences of different coatings, primers, and application techniques to optimize the matching system.

5. Product acceptance and quality control: Serve as the basis for factory and on-site acceptance of surface coatings for steel structures, pipelines, equipment, vehicles, and home appliances.