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2011 1

2005 1

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cementite 1

comprehensive strengthening of steel 1

graphitizing annealing 1

malleable iron 1

multistage heat treatment 1

nano-scale cementite 1

nano-scale titanium carbide 1

precipitation strengthening 1

yield strength 1

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Comprehensive strengthening mechanism of steel based on nano scale cementite precipitates

Fu Jie,Li Guangqiang,Yu Yueguang,Mao Xinping,Fang Keming

Strategic Study of CAE 2011, Volume 13, Issue 1, Pages 31-42

Abstract: X-ray small-angle scattering, RTO and high-resolution TEM observation, the properties of nano-scale cementitefraction were also found in Ti micro-alloyed high strength weathering steels.The volume fraction of cementiteCementite with high volume fraction has stronger precipitation strengthening effect than that of nano-scale

Keywords： yield strength nano-scale cementite nano-scale titanium carbide precipitation strengthening comprehensive

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Study on Technology of Multistage Heat Treatment for Malleable iron

Zou Anquan,Deng Peiran,Deng Fenyan,Deng Junyan,Chen Geying

Strategic Study of CAE 2005, Volume 7, Issue 12, Pages 74-77

Abstract:

Based on the characteristic of malleable iron, the technology of multistage heat treatment for malleable iron was investigated successfully. Compared with the present technology, the time of graphitizing annealing using new process was saved about 50% . The microstructure, with uniform distribution of fine polycrystal of graphite nuclei and full elimination of carbide, was obtained. Comprehensive mechanics performance of product exceeded that of present international standard . Two brands of KTH400 — 12 and KTZ750 - 02 can be added on the base of present international and “malleable iron” standards. Those products, such as line tool, pipe fitting for railway, engine piston of car etc, with better performances and credible qualities treated by the technology, were welcomed by users.

Keywords： malleable iron cementite multistage heat treatment graphitizing annealing