Transactions of Materials and Heat Treatment

Title：Analysis and control on forging cracks of steel 0Cr17Ni4Cu4Nb

Authors： Lang Rongxing Li Guiquan Yin Chunyun

KeyWords： steel 0Cr17Ni4Cu4Nb forging process forging crack ferrite content

ClassificationCode：TG316

year,vol(issue):pagenumber：2016,41(9):18-22

Abstract：

For raw materials and forging technology of stainless steel 0Cr17Ni4Cu4Nb，it was found that

the main reason for cracks produced in forging was the excessive amounts of the delta ferrite

in material internal microstructure. When the content of delta ferrite exceeded a certain

amount，the forging plasticity of material significantly decreased and the deformation

resistance increased. Once deformation gradually increased to a certain amount, the cracks

appeared, and became more serious with the increase of deformation. Research results show that

check and control the content of delta ferrite in raw materials before using to ensure that

the materials still have good plasticity in the hot working process and the ferrite content is

less than 20% and meets or above the standard of F7 level of CB/T 1209—1992. At the same time

roughness of the blank must achieve above Ra1.6 μm-Ra0.8 μm and the forging tools should be

preheated and the forging deformation of each heat should be strictly controlled to satisfy

the requirement of design and quality of forgings.

Funds：

江苏高校品牌专业建设工程资助项目（PPZY2015B 187)

郎荣兴（1963-），男，学士，副教授,高级工程师

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