The development history of the silicon steel sheet

- Oct 21, 2019-

In the early 1920s, Williams studied the single crystal in ferrosilicon and obtained um=1400000 in the direction of easy magnetization axis {100}. It is considered that the {100} axis should also be excellent in multi-die plates. Performance.

In 1926, the Japanese Bendo Mao found that the crystal orientation of iron is the easiest to magnetize, or the direction of the edge of the grain cube is the most easily magnetized direction.

In 1934, American NP Goss developed a successfully oriented silicon steel sheet in a laboratory. He used a combination of cold rolling and high temperature heat treatment to order the crystal grains in the silicon steel sheet in the rolling direction. magnetic.

In 1935, Goss published an article in TransAmer.Soc.Metals, introducing research results and applying for a British patent (No. 442211).

In the same year, Armco Company of the United States began industrial production of cold-rolled oriented silicon steel sheets. In the 1940s, both Armco and Allegheny produced high-quality oriented silicon steel sheets for transformers. Armco's grade is Tran-cor (Westinghouse called Hipersil); Allegeny's grade is Silectron (GE called Corosil).

In 1953, Japan experimented with cold rolled oriented silicon steel sheets.

In 1958, Japan introduced the patented technology of Armco, and began the industrial production of cold-rolled oriented silicon steel sheets. Based on this, the company continued to improve and made the performance of Japanese cold-rolled silicon steel sheets reach the highest level in the world.

In order to overcome this shortcoming, the single-oriented silicon steel sheet was inferior to the rolling direction. In the 1940s, the German vacuum melting company invented the double-oriented silicon steel sheet.

In 1957, GE and Westinghouse of the United States also made double-oriented silicon steel sheets at the same time. In the 1960s, the Kawasaki and Bagua factories in Japan also developed double-oriented silicon steel sheets. Its magnetic properties in the rolling direction and the vertical direction are similar to those in the rolling direction of the single-oriented silicon steel sheet. The grain of this silicon steel sheet has a cubic structure.

In 1968, Japan's Nippon Steel Plant began industrial production of high permeability magnetically oriented silicon steel sheets. Its commercial name is "Orientcore Hi-B", referred to as "Hi-B"; in 1972, large lattice high magnetically oriented silicon steel was developed. In 1981, a small lattice high magnetically oriented silicon steel sheet was further developed. In 1982, Japan began to produce a high magnetic permeability oriented silicon steel sheet with surface laser irradiation treatment (ZDKH), which further reduced the iron loss.

In 1988, Japan developed a highly magnetically oriented silicon steel sheet that was mechanically formed into a micro stress method (ADMH). See the development of Japan's Nippon Steel Corporation oriented silicon steel sheet. In the 1950s, the performance of single-oriented silicon steel sheets in several countries. · Between 1955 and 1975, the quality of Japanese oriented silicon steel sheets and non-oriented silicon steel sheets changed. From 1880 to 1970, the iron loss of the iron core steel sheet decreased.