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A special steel enterprise specializing in the production, research and development and sales of high alloy steel forgings

Identification Method of Quenching Crack and Non-Quenching Crack

Identification Method of Quenching Crack and Non-Quenching Crack

Quenching crack is a common quenching defect, which is caused by many reasons. Since the defects of heat treatment start from the product design, the work of preventing cracks should start from the product design. It is necessary to correctly select materials, reasonably carry out structural design, put forward appropriate heat treatment technical requirements, properly arrange the process route, select reasonable heating temperature, holding time, heating medium, cooling medium, cooling method and operation mode.

03

2022

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11

Advantages of Electric Arc Furnace Bottom Blowing Technology (DPP)

Advantages of Electric Arc Furnace Bottom Blowing Technology (DPP)

The electric arc furnace bottom blowing technology (DPP) was first applied on the 110t electric arc furnace of Thyssen Special Steel Company in Germany in 1980, with the following advantages.

03

2022

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11

Basic knowledge of normalizing, annealing, quenching and tempering

Basic knowledge of normalizing, annealing, quenching and tempering

The normalizing is a process in which the sub-co-analysis steel is heated to Ac3 30~50 ℃, the co-analysis steel is heated to Ac1 30~50 ℃, and the over-co-analysis steel is heated to Accm 30~50 ℃ and then air cooled. The normalizing cooling rate is larger than that of annealing.

03

2022

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11

Life and flaw detection standard of cold roll

Life and flaw detection standard of cold roll

Cold roll in the process of work to bear a lot of rolling stress, coupled with the weld, inclusions, edge cracks and other issues

17

2021

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11

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