sales@xo-pump.com

WhatsApp :+8615680632715

Application

View More +

scroll down

Home

Description

- Commodity name: Incoming Raw Material Quality Control
The material of core wear parts and pressure-bearing components directly determines the service life of slurry pumps. Raw material quality control eliminates unqualified materials and material mixing issues, serving as the foundation of overall product quality.

The material of core wear parts and pressure-bearing components directly determines the service life of slurry pumps. Raw material quality control eliminates unqualified materials and material mixing issues, serving as the foundation of overall product quality.
1.1 Core Raw Material Categories
Main materials include high-chromium alloys (Cr27, Cr28), high-chromium cast iron, wear-resistant rubber, carbon steel, stainless steel, bearing steel, sealing fillers and bolt fasteners, which are used for manufacturing pump bodies, impellers, protective sleeves, guard plates, pump shafts, bearing housings and sealing assemblies.
1.2 Detailed Quality Control Details
Material Certificate Verification: Each batch of raw materials must be accompanied by mill test certificates, spectral inspection reports and mechanical property reports. Verify material grade, chemical composition and melting batch number to prevent unqualified and mismatched batch materials from warehousing. Focus on checking chromium and carbon content of high-chromium alloys to meet national standards for wear-resistant parts.
On-site Spectral Re-inspection: Conduct 100% spectral sampling inspection on high-chromium cast iron, alloy steel and spindle steel. Focus on detecting key elements including Cr, C, Si, Mn, P and S, and strictly control harmful impurities (S ≤ 0.06%, P ≤ 0.08%). Materials with unqualified chemical composition will be rejected directly.
Mechanical Property Testing: Sample test each batch for tensile strength, hardness, impact toughness and wear resistance. The hardness of high-chromium wear parts shall be no less than HRC58. The hardness and tensile strength of carbon steel structural parts shall comply with design drawings. Materials with unqualified toughness are prohibited from production.
Visual and Dimensional Initial Inspection: Steel materials and casting blanks shall be free from cracks, pores, inclusions, porosity and peeling. The dimensional tolerance of profiles and sheet thickness shall meet procurement standards. Severely deformed or rusty materials shall be rejected.
Material Zoning Management: Store raw materials of different materials and batches in separate zones with clear identification labels to avoid material mixing. Verify acid and alkali resistance and wear resistance of rubber raw materials, as well as temperature resistance and corrosion resistance of sealing raw materials.
Non-conformity Disposal: Materials with mismatched grades or unqualified performances shall be returned directly. Record batch quality problems and incorporate them into supplier performance assessment.