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Oil Quenching and Tempering Alloy Spring Steel Wire65mn 60SI2MNA 55CRSI SAE9254V 50CRVA

Country/Region china
Company Henan Friend Metal Products Co.,Ltd
Categories Spring Steel Wire
Telephone 86-373-3686581
ICP License Issued by the Chinese Ministry
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    Oil Quenching and Tempering Alloy Spring Steel Wire65mn 60SI2MNA 55CRSI SAE9254V 50CRVA

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    Oil quenching - tempering steel wire Products Abstract: This paper briefly introduces the characteristics of oil quenching-tempering steel wire, the current product standard, product development direction;

    Product Details

    Oil quenching - tempering steel wire Products

    Abstract: This paper briefly introduces the characteristics of oil quenching-tempering steel wire, the current product standard, product development direction; and the production process and process control points, which provides useful information for the users to choose the steel wire grade and order quality products.

    Key words: oil quenching - tempering treatment, pre-hardening treatment, multiple tempering, on-line flaw detection.

    Special part of the steel products in the final need to quenching - tempering state, the traditional approach is to provide cold-drawn metal products factory annealing or state of the wire, the downstream enterprises will be made of steel wire parts or components, and then quenching + back Fire treatment, toughness to meet the scheduled requirements after delivery.

    Because the size of parts or components, shape ever-changing, bring the final heat treatment furnace vary widely, will inevitably lead to increased production costs, heat treatment performance fluctuations. Now gradually evolved into: the shape is not complex, easy processing of parts or components with wire quenching and tempering treatment transferred to the fabricated metal products factory, which formed a new species - quenching - tempering steel wire.

    1. Overview

    Oil quenching - tempering: a wire that is drawn to the finished size and quenched and tempered in a continuous furnace. The unwound wire is first heated to full austenitizing temperature in a continuous furnace and then quenched by oil bath Martensite, and then through the continuous furnace tempering, to obtain the expected strength and toughness. Oil quenching - tempering steel wire straightness is good, the uniformity of mechanical properties, made of components or components only after low temperature stress treatment that can be used directly.

    Oil quenching and tempering heat treatment furnace is composed of tension releasing device, heating furnace, oil quenching tank, tempering furnace and wire take-up machine. Commonly used in carbon spring steel wire, alloy spring steel wire, elastic wire cloth, alloy structural steel wire and martensitic stainless steel wire and other finished heat treatment, heat treatment of steel wire microstructure usually tempered martensite, tempered martensite or Tempering sorbite, with high strength (hardness), the appropriate toughness and good straight performance.

    Pre-hardening treatment: is a special oil quenching - tempering treatment, refers to the steel wire drawing to the finished size after oil quenching, and then according to the grade and use, and then one or more high-temperature tempering treatment, the wire Hardness or tensile strength to meet the requirements of the corresponding level. Commonly used in cold work die steel, hot die steel wire and plastic mold steel wire and other finished heat treatment. Because such steel wire carbon and alloying elements are high, oil quenching - tempering must use some special technical measures:

    ① to ensure the full dissolution of carbon and alloying elements, it is necessary to improve the austenitizing heating temperature (some up to 1150 ℃), to extend the holding time;

    ② quenching after the steel wire retained austenite content, in order to promote the decomposition of Paralympic steel wire to ensure the predetermined hardness, must be used multiple tempering method, tempering holding time than the general tempering to extend several times to several hundred times.

    ③ general quenching - tempering treatment, the purpose of tempering: to promote the transformation of martensite into tempered martensite, tempered sorbite, tempered sorbite or pearlite, tempering steel wire after the toughness and plasticity But the tensile strength and hardness must have a different range of decline.

    In the pre-hardening treatment, the tempering also has the purpose of promoting the transformation of the microstructure, but also has the effect of precipitation hardening. The Fe, Mn and alloying elements (Cr, Mo, Ti, V, W, Al, etc.) , Nitride or intermetallic compound ( 'and ' 'phase) precipitation, the steel wire can be done in toughness and plastic significantly improved at the same time, tensile strength and hardness no significant decline, or even improved.

    Special process requirements determine the pre-hardened equipment and general (spring steel) oil quenching - tempering equipment is very dif

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