Steel wire thermal treatment method and production equipment of steel wire

Abstract

The invention discloses a steel wire thermal treatment method and production equipment of steel wire. The steel wire thermal treatment method comprises the following steps: 1, heating treatment: heating a steel wire (preferably, feeding the steel wire in a thermal treatment furnace to be heated); 2, quenching: feeding the heated steel wire in a quenching unit to be cooled in a manner of temperature control, wherein the quenching unit adopts the system of controlling the temperature in a subsection manner. According to the steel wire thermal treatment method, the quenching unit adopts the manner of controlling the temperature in a subsection manner to effectively control sorbite texture, and the sorbite texture is obtained after quenching, the interlamellar spacing of the sorbite texture issmaller and the cluster size of the sorbite texture is tiny, so that the stability of the microscopic structure is ensured and the tensile strength and the fatigue life of the steel wire are improvedand prolonged.

Description

technical field [0001] The invention relates to a steel wire heat treatment method and production equipment thereof. Background technique [0002] Heat-treated steel wire is heated to A C3 The above temperature is kept for a period of time, and then cooled in a constant temperature medium to obtain a sorbite structure and ensure the final excellent mechanical properties of the finished steel wire. At present, it is basically directly heated to the preheating temperature. This method High energy consumption, and small changes in steel wire temperature or environment will cause changes in the heating environment of the steel wire. Once overheated, the austenite grains will be significantly coarsened, and a widmanstatten structure will be formed in the subsequent quenching, reducing the strength of the steel wire. , Increased brittleness, affecting product quality and stability; In addition, in the quenching process, precise temperature control is required. Once the temperatur...

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Problems solved by technology

[0002] Heat-treated steel wire is heated to A C3 The above temperature is kept for a period of time, and then cooled in a constant temperature medium to obtain a sorbite structure and ensure the final excellent mechanical properties of the finished steel wire. At present, it is basically directly heated to the preheating temperature. This method High energy consumption, and small changes in steel wire temperature or environment will cause changes in the heating environment of the steel wire. Once overheated, the austenite grains will be significantly coarsened, and a widmanstatten structure will be formed in the subsequent quenching, reducing the strength of the steel wire. , Increased brittleness, affecting product quality and stability; In addition, in the quenching process, precise temperature control is required. Once the temperature is low or high, the microstructure of the steel wire will change, thereby affecting its mechanical properties

[0003] In addition, after pickling, the steel wire is subjected to phosphating treatment, so that a layer of phosphate film is formed on the surface of the steel wire, which is convenient for steel wire drawing and has a certain anti-corrosion ability. However, water washing is also required after phosphating to remove excess The phosphating solution is cleaned and is convenient for saponification treatment. The cleaning water contains phosphorus, zinc, nitrogen and other elements, which need to be discharged after sewage treatment, and the treatment cost is high

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