Method for preparing Cr-Ni system Austenitic heat-resistant steel springs and cool-drawn steel wires thereof

A technology of austenitic heat-resistant steel and cold-drawn steel wire, which is applied in the fields of metallurgy, chemical industry, metal materials and their preparation, and machinery. rate effect

Inactive Publication Date: 2010-02-10
CENT IRON & STEEL RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Selecting the amount of cold-drawing deformation in the present invention can improve the qualification rate of the spring, but in the prior art, no in-depth research has been carried out on the amount of cold deformation that best matches the composition

Method used

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  • Method for preparing Cr-Ni system Austenitic heat-resistant steel springs and cool-drawn steel wires thereof
  • Method for preparing Cr-Ni system Austenitic heat-resistant steel springs and cool-drawn steel wires thereof
  • Method for preparing Cr-Ni system Austenitic heat-resistant steel springs and cool-drawn steel wires thereof

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with a typical embodiment.

[0033] In this embodiment, the specific composition of the 1Cr15Ni27Ti3Mo1Al austenitic heat-resistant steel used is shown in Table 1. The specific process flow is:

[0034] Preparation of cold drawn steel wire

[0035] A furnace of 1Cr15Ni27Ti3Mo1Al austenitic heat-resistant steel is smelted by vacuum induction + vacuum consumable, and the specification of vacuum consumable ingot is Φ240×1800mm. Use a 2000t fast forging machine to open the consumable ingot, process it into a 145mm square billet, and then roll it into a Φ8mm straight bar through a 650 and 250 rolling mill. ℃. Straight bars are pickled, surface cleaned, cold drawn to Φ5.5mm, softened and annealed at 1050°C, pickled and finished, cold drawn to Φ3.16mm, Φ3.36mm, Φ3.59mm, Φ3.87mm respectively, After softening annealing, pickling and finishing, and finally cold drawing into Φ3mm wire, the cold deformation o...

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Abstract

The invention relates to a method for preparing Cr-Ni system Austenitic heat-resistant steel springs and cold-drawn steel wires thereof. The method for preparing the cold-drawn steel wires comprises the following steps: smelting; forging; hot rolling; and cold deforming, wherein the cold-drawn steel wire comprises the following chemical components by weight percentage: 0.025wt% to 0.085wt% of C, 14.0wt% to 16.0wt% of Cr, 25.0wt% to 28.0wt% of Ni, 1.0wt% to 1.6wt% of Mo, 2.6wt% to 3.2wt% of Ti, 0.22wt% to 0.45wt% of Al, 0.28wt% to 0.44wt% of Si, 0.24wt% to 0.45wt% of Mn, no more than 0.007wt% of S, no more than 0.010wt% of P, 0.0025wt% to 0.01wt% of B, 0.0013wt% to 0.03wt% of Ca, and the balance being Fe and unavoidable impurities; and the deformation in the cold-deforming step is 10% to 40%, while the optimum cold deformation is 20% to 25%, thereby best fitting the strength and plasticity of the steel wires. The heat-resistant steel springs prepared from the steel wires greatly increase the resilience thereof, thereby improving the qualification rate of prepared springs.

Description

technical field [0001] The invention belongs to the field of metal materials and their preparation, and in particular relates to a Cr-Ni system austenitic heat-resistant steel spring and a method for preparing the cold-drawn steel wire thereof, which are mainly applicable to the fields of metallurgy, machinery, chemical industry and the like. Background technique [0002] In the current technology, the amount of cold deformation used for cold-drawn wire is usually between a few percent and more than 90 percent, which is mainly determined according to the steel type, use and performance requirements of the wire. For example, in order to ensure that the Fe-Cr-Ni series austenitic stainless steel has good permanent magnetic properties, the cold-drawn deformation of the wire is preferably controlled at more than 90% ("Shanghai Iron and Steel Research" 2000 Vol. 26 Issue 3, pages 1-4). For GH90 wire used as a spring, in order to ensure that the technical requirements are met, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04C22C38/54B21C1/02C21D1/32C22C33/04B21B37/74C21D8/06C21D7/02B23P15/00C21D9/02
Inventor 王立民杨钢刘正东程世长林肇杰李密
Owner CENT IRON & STEEL RES INST
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