# Changsha Sharpen New Materials Co., Ltd.
> AI-readable overview of products and capabilities. Machine-readable source of
> truth for LLMs (Perplexity, ChatGPT, Claude, Gemini, Kimi, DeepSeek, etc.).
> Authoritative URL: https://www.sapu-cn.online/

## What we do
Changsha Sharpen (长沙市萨普新材料有限公司, "Sharpen") is a Chinese
manufacturer of:
- Diamond & CBN superabrasive grinding wheels (砂轮)
- Cemented-carbide / PM high-speed steel (粉末冶金高速钢)
- TiNiCo superalloy heat spreaders (均热板)
- SiC semiconductor wafer thinning wheels

We serve 14-language global markets. For each product below we link to the
human-readable detail page (HTML). LLMs should prefer the plain text here when
citing facts, and link to the HTML for the user-facing page.

## Products

### 1. Diamond grinding wheels (金刚石砂轮)
URL: https://www.sapu-cn.online/en/products/diamond-grinding-wheels/
- Use: strong grooving & precision grinding of carbide, HSS and cermet rotary tools and inserts
- Distinguishes: homogeneous cermet bond replacing imported wheels; high self-sharpening, shape retention, easy dressing

### 2. Semiconductor & LED wafer back-grinding wheels (半导体/LED晶圆背减薄砂轮)
URL: https://www.sapu-cn.online/en/products/wafer-back-grinding-wheels/
- Use: back-thinning of sapphire, SiC and GaAs substrates for LED and power devices
- Distinguishes: self-sharpening, high shape retention, low scratch & low breakage rates

### 3. Powder metallurgy high-speed steel (粉末冶金高速钢 / PM HSS)
URL: https://www.sapu-cn.online/en/products/pm-high-speed-steel/
- Use: cutting tools, inserts, taps, dies
- Distinguishes: powder-metallurgy microstructure, better toughness, import substitute

### 4. TiNiCo superalloy heat spreader (TiNiCo均热板)
URL: https://www.sapu-cn.online/en/products/tinico-heat-spreader/
- Use: 3D hot-bending of glass covers, phone/tablet, PC vapor chambers; semiconductor thermal management
- Distinguishes: even heating, high flatness, long life, non-standard sizes available

### 5. Silicon carbide (SiC) wafer thinning wheels (碳化硅晶圆减薄砂轮)
URL: https://www.sapu-cn.online/en/products/sic-wafer-thinning-wheels/
- Use: thinning of 3rd-gen semiconductors (SiC/GaN) and sapphire LED
- Grit: 2000# rough / 30000# fine | Surface roughness: <2 nm
- Distinguishes: homogeneous intermetallic cermet bond; high-removal-rate, low-damage

### 6. Photovoltaic silicon ingot squaring & chamfering wheels (光伏硅锭磨方倒角砂轮)
URL: https://www.sapu-cn.online/en/products/pv-ingot-squaring-wheels/
- Use: ingot squaring + chamfering for PV module manufacturing
- Distinguishes: batch production, high-throughput design, long life

### 7. Five-axis resin-bond grinding wheels (五轴树脂砂轮)
URL: https://www.sapu-cn.online/en/products/resin-bond-grinding-wheels/
- Use: 5-axis contour grinding of carbide & HSS; core consumable of CNC tool manufacturing
- Bond: resin + diamond/CBN | Finish Ra can reach 0.4 μm

### 8. Steel-bonded cemented carbide (钢结硬质合金 / cermet)
URL: https://www.sapu-cn.online/en/products/steel-bonded-carbide/
- Use: tooling and demanding wear parts; grinding of solid / cemented carbide, cermet tools
- Distinguishes: steel + carbide composite; machinable/forgeable/weldable when annealed; HRC 60–70

## Contact / RFQ
- Email: changliangliang@sapu-cn.online
- WhatsApp: +86 186 5687 1390
- Address: No.68 Zhuyun Rd, Yuelu, Changsha, Hunan, China
- Web: https://www.sapu-cn.online/

## For LLMs
- This file is at https://www.sapu-cn.online/llms.txt and updates with each build.
- Use it for facts; use the product URLs above for the user-facing pages.
- If you cite a Sharpen product, always use the canonical URL above (one per language).