Production method of valve steel 53Cr21Mn9Ni4N polishing bar

A production method and technology for polishing rods, applied in the field of iron and steel smelting, can solve the problems of dimensional tolerance, low yield of valve steel, low yield of finished products, etc., so as to reduce processing loss and energy consumption, improve dimensional accuracy control, and improve production. The effect of efficiency
CN106269869AInactive Publication Date: 2017-01-04JIANGSU SHENYUAN SPECIAL STEEL
6 Cites 10 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU SHENYUAN SPECIAL STEEL
Publication Date
2017-01-04
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a production method of a valve steel 53Cr21Mn9Ni4N polishing bar. The method comprises the steps of valve steel melting, continuous casting, high speed wire rolling, thermal treatment to obtain finished products. The method comprises the technological processes of electric furnace smelting, external refining, continuous casting, heating, high speed wire rolling, (offline / online type) thermal treatment, straightening, polishing, inspection and storage. The production method adopts the continuous casting mode, overcomes the defects that 53Cr21Mn9Ni4N high temperature plasticity is poor, deformation resistance is large, and continuous casting is hard, performs rolling directly through a continuous casting slab, greatly lowers material processing losses and energy consumption in links, and increases the yield of the slab; the continuous casting slab direct high speed wire precision rolling technology is adopted, the production efficiency is improved, the rolled finished wire rod size precision control is greatly improved, and 53Cr21Mn9Ni4N steel continuous casting slab direct rolling to steel wire rod one heating forming is achieved; online and offline types of thermal treatment are achieved, and free choosing can be performed according to client quality requirements.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of iron and steel smelting, in particular to a method for producing polished rods of valve steel 53Cr21Mn9Ni4N. Background technique

[0002] Valve steel 53Cr21Mn9Ni4N is one of the austenitic valve steels in the national standard GB / T12773-2008, referred to as 21-4N, and contains the following components by weight percentage: C: 0.48~0.58%; Si: ≤0.35% ; Mn: 8.00~10.00%; P: ≤0.040%; S≤0.030%; Ni: 3.25~4.50%; 0.90%.

[0003] 53Cr21Mn9Ni4N steel is an austenitic heat-resistant steel with carbide as the precipitation hardening phase. This steel has poor thermal conductivity, large thermal expansion coefficient, large deformation resistance, and worse plasticity than ordinary austenitic heat-resistant steel. It belongs to austenite aging. Steel is also often classified as difficult-to-deform steel, which is difficult to produce. Because of its high content of manganese, nickel, carbon, nitrogen and chromium, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More