Introduction
With outstanding corrosion resistance and oxidation resistance, 4Cr14Ni14W2Mo is widely used in valves and machine manufacturing. Good weldability, machinability of 4Cr14Ni14W2Mo makes it easy to process into long and short shafts and is then assembled on both sides of large equipment such as butterfly valves. Besides, Its wear-resistance and corrosion-resistance properties are also helpful for use and processing. Expect for normal bars, plants, coils, and pipes, 4Cr14Ni14W2Mo can also be used in the production of various molds such as creep forming die of titanium alloy, strong corrosive glass-forming die and core mold for die casting. In general, 4Cr14Ni14W2Mo plays an important role in today's manufacturing industry due to its excellent mechanical and chemical properties.[1]
Example1--application in valve production
The following figure shows the manufacturing process using 4Cr14Ni14W2Mo in valve production. 4Cr14Ni14W2Mo raw material was first processed into long and short shafts, and then it is assembled into both sides of the butterfly valve as the valve spindle to complete the valve. Strong corrosion resistance and wear resistance and great weldability, machinability of 4Cr14Ni14W2Mo plays an important role in valve production, ensuring high durability and stability of the completed valve.[2]
Figure 1. A valve application of 4Cr14Ni14W2Mo[2]
Example2--application in hot-work die
Figure 2. Hot-work die steel
4Cr14Ni14W2Mo is also usually used in the production of hot-work die as creep forming die of titanium alloy and strong corrosive glass forming die. Since 4Cr14Ni14W2Mo has high temperature strength and heat resistance due to its stable structure, the application of 4Cr14Ni14W2Mo in Hot-work die can meet the requirements of high temperature resistance, corrosion resistance and oxidation resistance of hot- die.
Future potential
Since different treatment methods and chemical composition of 4Cr14Ni14W2Mo will lead to different properties, there remains a huge potential for improving the property of 4Cr14Ni14W2Mo according to the required application. For example, The experimental results show that the 45Cr14Ni14W2Mo steel can obtain preferable mechanical properties after solution at 1170 ℃ for 60 min and age at 760 ℃ for 5 h, which can meet the standard requirements of superalloy bars for internal combustion engines and valve steel.[3][4]
Figure.3 Microstructure of 45Cr14Ni14W2Mo steel aged at different temperatures for 60 min (a)720 ℃;(b)750 ℃; (c) 760 ℃ ; (d) 800 ℃[3]
At present, the research on treatment, structure ,and property of 4Cr14Ni14W2Mo is still going on, which provides a promising future for the application of 4Cr14Ni14W2Mo in special conditions and machine manufacturing.
Figure4. Application prospect of 4Cr14Ni14W2Mo in machinery manufacturing
References
[1]General Administration of Quality Supervision, Inspection and Quarantine of the P.R.C；Standardization administration of the P.R,C. GB/T 1221-2007 Heat-resistance steel bar. 2007.
[2]From the contact company, Luoyang Weixin Equipment CO.LTD.
[3]Bao Wenquan, Liu Guijiang, Yang Jianhua, Guo Qiang. Effect of heat treatment on Microstructure and properties of 45cr14ni14w2mo steel [J]. Metal heat treatment, 2016,41 (05): 153-155
[4]Xiong Guangyao1,He Bolin1,Zou Rui.The Research of Microstructure and Properties of The 4Cr14Ni14W2Mo Steel With QPQ Salt-bath Nitriding[C]. Dalian University of Technology,2007:181.