High-hardness impact-resistant cold rolled steel working roll and processing technique thereof

Abstract

The invention discloses a high-hardness impact-resistant cold rolled steel working roll. The working roll adopts low-alloy high-strength steel, and the low-alloy high-strength steel comprises chemical components (C, Si, Mn, Cr, Mo, V, Ti, S and P) and the balance of Fe and inevitable impurities. The processing technique of the cold rolled steel working roll comprises the following steps of: teeming, forging forming, heat treatment after forging, machining for forming, ultrasonic flaw detection, modulating treatment, preheating, line-frequency induction treatment, tempering, finish machining, ultrasonic flaw detection, coarse grinding of grinding machine, finish machining for modifying R, ultrasonic surface flaw detection, hardness detection of finished product, and packaging and storing. In the chemical component proportion of the cold rolled steel working roll, Si and Mn with lower price are selected to improve the hardenability of the material and change the bainite in material tissues, the form distributed tissues has higher stability, tenacity, crack initiation resistance capability, as well as high crack propagation resistance capability.

Description

technical field [0001] The invention relates to a cold roll, in particular to a high-hardness impact-resistant cold-rolled steel work roll and its processing technology. Background technique [0002] The cold rolling process of steel began in Germany in the middle of the 19th century. At that time, only 20-25mm narrow strips of low carbon steel could be produced. As early as 1920, the United States successfully rolled out wide strips for the first time. In 1924, Butler, the Amco Steel Company in the United States, built the world's first three-stand four-roll tandem cold rolling mill. Since the 1950s, the United States began to build a five-stand tandem cold rolling mill. . In order to roll thinner tin-plated raw materials, the Youngston Plate and Tube Company of the United States built the world's first six-stand continuous cold rolling mill in the early 1960s. The process joint full continuous production line (FIPL) of Nippon Steel Hirohata Plant started in 1986. Since t...

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Problems solved by technology

However, the export in the same period was relatively small, indicating that the domestic cold-rolled strip is still in short supply, and the domestic gap is relatively large.