QPQ Salt Bath Nitriding Composite Processing Technology OHSAS

QPQ Salt Bath Nitriding QPQ composite processing technology

After 10 years of experimental research, CAEC successful developed the second generation of QPQ technology - deep QPQ technology. The thickness of compound layer was increased from the original 15 ~ 20 microns to more than 30 ~ 40 microns. Picture 1 shows Metallographic photos for Deep QPQ treatment and general QPQ technology treatment

It has been proved by abrasion resistance test, corrosion test, mechanical property test and permeability layer microstructure test that component compound layer thickness is multiplied and work piece’s various performances are greatly improved after second generation QPQ treatment.

Wear resistance: sliding wear after deep QPQ treatment on 45 steel demonstrate that wear resistance is four times that of ordinary QPQ treatment. Work-piece rolling wear experiment shows similar results.

Corrosion resistance: after deep QPQ treatment of 45 steel corrosion resistance of weightlessness experiment is 12 times increase compared to traditional QPQ treatment.

Corrosion resistance is more than 1 times higher. If combined with sealant, the corrosion resistance of salt spray test can reach more than 300 h or even higher.

Impact toughness: impact toughness after deep QPQ treatment on 45 steel is 1.98 times higher than ordinary QPQ treatment.

Table 1

Performance Comparison between Deep QPQ treatment and general QPQ technology treatment

QPQ Equipment Series Table

Remarks: Customized request is available

QPQ salt bath composite processing special salt series table

China Abrasives Industry Hainan Corporation, the predecessor was China Abrasives Import & Export Corporation, which was approved by the former National Machinery Commission and the State Import and Export Management Committee and founded in 1981. It's a leading enterprise in the import and export business of China abrasives industry, and the Chairman Unit of Abrasives Branch of China Machine Tool Industry Association. The company takes abrasives and related industry trade services as its core business. After years of hard work and exploration, the company has accumulated a wealth of international market and trade resources, and its business covers more than 80 countries and regions.

In September 2013, the company joined the SINOMACH Precision Industry Co., Ltd., a subsidiary of the world's top 500 China National Machinery Industry Corporation (abbreviated as SINOMACH). Relying on the strong group advantages and the support of five major R&D and manufacturing bases, the company integrates products and services,and combines importation and exportation. Its products are widely used in construction, automobiles, electronics, steel, and energy. CAEC provides customers with a series of products and a full range of services.