Metal conveyor belt quality appraisal

metal conveyor belt is based on the core principles of high-strength alloy braiding and wear-resistant surface treatment. By optimizing the metal wire material, braiding structure and heat treatment process, it achieves the synergy of tensile strength, high temperature resistance and corrosion resistance. It is widely used in high-temperature heat treatment furnaces, food baking lines, mining transportation and chemical drying and other fields. In the metallurgical industry, it is used for continuous transportation of continuous casting slabs; in the food processing field, it meets the sanitary corrosion resistance requirements of baking equipment; in mining scenarios, it ensures high-intensity transportation of heavy-duty ore. Compared with traditional rubber or plastic conveyor belts, metal conveyor belts have the characteristics of strong wear resistance, long life, and high cleanliness. They are the core component of material transmission under extreme working conditions.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide metal conveyor belt quality appraisal services. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for metal conveyor belt quality appraisal.

As the complexity of industrial transmission scenarios increases, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index dispute: whether the tensile strength reaches the standard, and the high temperature resistance performance is inconsistent;

2, material defects: insufficient Cr/Ni content of metal wire, table The top coating has poor adhesion;

3. Process problems: The welding points have large grains and loose braiding structure;

4. Contract performance disputes: material substitution, edge treatment process and technical agreement are inconsistent.

1. Appearance inspection: Check the appearance of the conveyor belt for defects, deformation, damage, etc.

2. Bearing capacity test: Use special equipment to load the conveyor belt and measure whether its bearing capacity meets the standard requirements.

3. Tensile strength test: Fix the conveyor belt on the tensile machine, apply tensile force, and measure the tensile strength when it breaks.

4. Wear resistance performance test: Use a wear machine to simulate the working environment of the conveyor belt and measure its wear amount.

5. Corrosion resistance test: Soak the conveyor belt in the corrosive solution and measure the degree of corrosion.

A steel plant of the applicant signed a "High Temperature Resistant Metal Conveyor Belt Purchase Contract" with an equipment manufacturer of the respondent, agreeing that the temperature resistance is ≥700℃. After three months of use, the conveyor belt broke in many places. The manufacturer argued that it was caused by overloading.

Identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of the "metal conveyor belt", contract technical agreement, on-site investigation case materials and other data, and made the following quality analysis opinions: HTMLTAGTOKEN The metal wire Mo content of the metal conveyor belt involved in 5

is 1.5% (agreement ≥ 2.5%), and the weight gain due to high-temperature oxidation is 3.8% (standard ≤ 2%); the grain size of the welding area is level 4 (standard ≥ level 6), and the tensile strength is only 850N/mm² (agreement ≥ 1000N/mm²); the warp density of the braided structure is 18 strands/10cm (agreement ≥ 25 strands/10cm).

The appraisal conclusion determined that material composition and workmanship defects were the main causes of the fracture.

The metal conveyor belt quality appraisal report should include:

1, appraisal purpose and reference standards;

2, specifications of the pipe involved, production batch number, construction record;

3, testing method Methods and equipment list;

4, correlation analysis of test data and failure;