Research on Large-size Pre-hardened Mould Blocks of Plastic Mould Steels

Dangshen, Ma; Wang, Lin; Kang, Aijun; Guo, Qiang; Wang, Yongwei; Zai-zhi, Chen; Cao, Lihong; Zhou, Wei; Chen, Nailu

doi:10.1007/978-3-642-17665-4_44

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“…The surging automobile industry energises the production and consumption as well as the research of plastic mould steels. 1 AISI P20 is the most frequently used plastic mould steel, its derived varieties DIN2738 and 718 (Swedish grade) have long been extensively applied. P20 family is usually called quenched and tempered (QT) prehardened steel for plastic mould, because it is delivered as QT condition from steel works to mould producers, and thus needing no further heat treatment after a mould has been machined.…”

Section: Introductionmentioning

confidence: 99%

Effect of titanium on the microstructure and hardness uniformity of non-quenched and tempered prehardened steel for large-section plastic mould

Zheng

et al. 2016

Ironmaking & Steelmaking

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Two non-quenched and tempered (NQT) prehardened plastic mould steels, differing by titanium content, were produced to have good hardness uniformity in large sections (485 × 970 and 465 × 1325 mm 2 ). The effect of titanium on continuous cooling transformation curves, hardness uniformity and microstructure (grain size, phase constituents) were studied. It was found titanium had refined the grain size of NQT steel by the pinning effect of Ti (C, N) at grain boundaries, and titanium also effectively postponed the nucleation of proeutectoid ferrite in intercritical region. Using finite element method, the cooling rate from core to surface along longitude direction of the steels was predicted. The results indicated that the NQT steel with titanium had better process adaptability than that of NQT steel without titanium. Compared with production of NQT steel without titanium, production for NQT steel with titanium can largely save the production cost by shortening the production cycle and reducing the resources.

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Section: Introductionmentioning

confidence: 99%

Effect of titanium on the microstructure and hardness uniformity of non-quenched and tempered prehardened steel for large-section plastic mould

Zheng

et al. 2016

Ironmaking & Steelmaking

View full text Add to dashboard Cite

show abstract

Research on Large-size Pre-hardened Mould Blocks of Plastic Mould Steels

Cited by 1 publication

References 1 publication

Effect of titanium on the microstructure and hardness uniformity of non-quenched and tempered prehardened steel for large-section plastic mould

Effect of titanium on the microstructure and hardness uniformity of non-quenched and tempered prehardened steel for large-section plastic mould

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