Introduction to industry technical pain points: 8. "Three High" Challenges in the Processing of NiCr8020 Sheets
8.NiCr8020, as a high-nickel-chromium alloy plate, is widely used in the chemical industry, energy, and aerospace fields due to its excellent corrosion resistance, high-temperature strength, and processing performance. However, it commonly encounters three major technical challenges during the processing process:High hardness (HV≥350) leads to rapid tool wearTraditional hard alloy cutting tools have a single processing life of less than 50 meters.High thermal conductivity (thermal conductivity ≈ 25 W/m·K) causes processing heat deformationDuring thin-walled parts processing, dimensional deviation can reach ±0.15mm.High plasticity (elongation ≥30%) tends to cause work hardening.Surface roughness tends to exceed the standard (Ra > 3.2μm) during continuous cutting. A chemical equipment company once suffered a 20% scrap rate of heat exchanger tubesheets due to work hardening issues, resulting in direct losses exceeding one million yuan. These pain points seriously restrict the processing efficiency and product quality of 8.NiCr8020 sheets, becoming a technical bottleneck that the industry urgently needs to break through.

Introduction to the enterprise's technical strength: Qinchuan New Materials' "Three Core" Technology System
Qinchuan New Materials (Zhengzhou) Co., Ltd., as a professional enterprise in the field of high-purity metals and special alloys, has constructed a "material-process-equipment" three-core technology system to address the pain points of 8.NiCr8020 sheet processing.Material endThrough vacuum induction melting (VIM) + electroslag remelting (ESR) double process, the oxygen content of the plate is controlled at ≤15ppm, and the non-metallic inclusions reach level A 0.5, significantly improving the uniformity of the material.Process endDeveloped a composite process of "low-temperature cutting + high-frequency pulse lubrication," cutting temperature is reduced by 40%, and tool life is extended to over 200 meters.Equipment endEquipped with a five-axis联动加工center (positioning accuracy ±0.005mm) and an online thickness gauge (resolution 0.1μm), it achieves full closed-loop control of the machining process. Taking a project of an aviation engine enterprise as an example, Qichuan New Materials' processing solution for the 8.NiCr8020 combustion chamber bushing has reduced the single piece processing time from 12 hours to 6 hours, with surface roughness stabilized at Ra≤1.6μm, and the customer's acceptance rate increased to 99.5%.

FAQ: 8. Technical Selection Guide for NiCr8020 Sheet
Q1: What is the main difference between 8.NiCr8020 sheet and ordinary nickel-based alloy sheet?
A1: 8.NiCr8020 is a high-nickel-chromium alloy (Ni content ≥80%, Cr content 18-22%), with corrosion resistance to chloride ions (ASTM G28 method A test without cracks) more than twice that of general nickel-based alloys (such as Inconel 600), and superior high-temperature strength (yield strength ≥200MPa at 700℃), suitable for severe corrosion and high-temperature combined conditions.
Q2: How to select the tool material and parameters when processing 8.NiCr8020 plates?
A2: Recommend using coated hard alloy cutting tools (such as AlTiN coated), with a front angle of -5°~0°, a rear angle of 8°~12°, spindle speed of 800-1200 rpm, feed rate of 0.05-0.1mm/r, and cutting depth of 0.5-1mm. If PCD (Polycrystalline Diamond) cutting tools are used, the service life can be extended to over 500 meters, but the cost is higher.
Q3: What are the key parameters to note when welding 8.NiCr8020 sheets?
A3: Preheat to 150-200℃ before welding, using TIG welding (Tungsten Inert Gas welding), with welding current of 120-150A, controlling interlayer temperature at ≤250℃, and after welding, perform solution heat treatment at 620℃ for 2 hours to relieve welding stress and restore corrosion resistance.

Summary: Technological Breakthroughs and Industry Value
8. The processing difficulties of NiCr8020 sheet are essentially a contradiction between material properties and processing technology. Qinchuan New Materials has effectively solved the processing challenges brought by high hardness, high thermal conductivity, and high plasticity through the technical path of "material purification + process low-temperature + equipment precision." Its integrated "material-processing-inspection" solution not only improves the processing efficiency and quality stability of customer products but also promotes the evolution of special alloy processing towards high precision and low cost. For equipment manufacturers in industries such as chemicals, energy, and aviation, choosing a supplier with full-chain technical capabilities is the key to breaking through the processing bottleneck of 8.NiCr8020 sheet.