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High-strength steel and snap ring manufacturing method

A technology of high-strength steel and manufacturing method, which is applied in the field of parts manufacturing, can solve problems such as matching and difficult super-high-strength parts, and achieve the effects of improving strength and toughness, improving drawing performance, and good elasticity and torsion

Inactive Publication Date: 2018-11-13
MAGANG (GROUP) HOLDING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a high-strength steel that can improve the hardness of the snap ring while satisfying the elasticity, toughness, and torsion performance of the snap ring, and a method for manufacturing the snap ring using the high-strength steel, so as to solve the problem of existing hardness snap ring products. It is difficult to match with ultra-high strength parts

Method used

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  • High-strength steel and snap ring manufacturing method
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  • High-strength steel and snap ring manufacturing method

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preparation example Construction

[0038]The specific operation method for the preparation of the high-strength steel and wire rod in the above step 2 is as follows: a. Put the raw materials prepared in the step 1 into the electric arc furnace for smelting; b. Refining in the LF furnace; c. Vacuum degassing; d. billet continuous casting; e. billet rolling; f. high-speed wire rod rolling; when performing the step f. The rolling temperature is 910-980°C, and the spinning temperature is 780-880°C, so as to ensure that the rolled wire structure is a fine and uniform sorbite structure, which is beneficial to the drawing performance of the wire rod. In the preferred solution of the present invention, step d is continuous casting of a round billet with a diameter of 380mm, said step e is rolling a 150mm×150mm square billet, and said step f rolls a wire rod with a diameter of 10mm.

[0039] The specific operation of the above step 4: annealing is: protective atmosphere spheroidizing annealing; the specific operation of...

Embodiment 1

[0041] Example 1, the proportion of high-strength steel is C: 0.78%, Si: 1.03%, Mn: 0.73%, Nb: 0.040%, S: 0.002%, P: 0.008%, T.O: 13ppm, Alt: 0.005%, The rest are Fe and unavoidable impurity elements, as shown in Table 1. Manufacture the snap ring according to the above steps, wherein the diameter of the continuous casting round billet is 380mm, the size of the rolled square billet is 150mm×150mm, and the specification of the wire rod is 10mm; the heating temperature for the wire rod rolling is 1065°C, and the rolling The rolling temperature is 978°C, the final rolling temperature is 915°C, and the spinning temperature is 792°C. As shown in Table 2, the rolled wire rod has a fine and uniform sorbite structure, as shown in Table 2. figure 1 As shown; the quenching temperature is 860°C and the tempering temperature is 440°C during the heat treatment of the snap ring. Elastic snap rings with good elasticity and torsion performance and a hardness range of 52HRC to 56HRC, as shown...

Embodiment 2

[0042] Example 2, the proportion of high-strength steel is C: 0.80%, Si: 0.98%, Mn: 0.72%, Nb: 0.042%, S: 0.003%, P: 0.008%, T.O: 12ppm, Alt: 0.005%, The rest are Fe and unavoidable impurity elements, as shown in Table 1. Manufacture the snap ring according to the above steps, wherein the diameter of the continuous casting round billet is 380mm, the size of the rolled square billet is 150mm×150mm, and the specification of the wire rod is 10mm; The rolling temperature is 975°C, the final rolling temperature is 918°C, and the spinning temperature is 789°C. As shown in Table 2, the rolled wire rod has a fine and uniform sorbite structure, as shown in Table 2. figure 2 As shown; the quenching temperature is 860°C and the tempering temperature is 440°C during the post-treatment of the snap ring. The elastic clasp with good elasticity and torsional property and hardness range of 52HRC to 56HRC is obtained, as shown in Table 3 and Figure 4 shown. Among them, the microstructure o...

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Abstract

The invention discloses high-strength steel. The high-strength steel comprises, by weight, 0.70-0.85% of C, 0.80-1.15% of Si, 0.60-0.80% of Mn, 0.02-0.08% of Nb, 0-0.010% of S, 0-0.010% of P, 0-15ppmof T.O, 0-0.010% of Alt and the balance Fe and inevitable impurity elements. The high-strength steel is used for manufacturing an elastic snap ring. The invention further discloses a manufacturing method of the snap ring, and the high-strength steel is rolled into a wire rod coil and used for manufacturing the elastic snap ring. The method for manufacturing the snap ring through the high-strengthsteel comprises the steps that 1, a raw material of the high-strength steel is prepared according to the contents of all the elements; 2, the high-strength steel is manufactured through the raw material prepared in the step 1 and is subjected to rod coil rolling to be made into a wire rod; 3, wire rod drawing is conducted; 4, annealing is conducted; 5, cold rolling is conducted; 6, the wire rod isbent to form a circle; 7, the hole shape and the circle shape of the snap ring are made; 8, heat treatment is conducted; and 9, surface treatment is conducted, the snap ring which is good in elasticity and twisty performance is obtained, the hardness of the snap ring is 52-56HRC, and the good fatigue performance is achieved.

Description

technical field [0001] The invention belongs to the technical field of component manufacturing, and in particular relates to a high-strength steel and a method for manufacturing snap rings using the high-strength steel. Background technique [0002] The elastic snap ring is a common automotive fastener, also called a snap ring and a washer. Its function is to prevent the axial movement of other parts installed in the hole or on the shaft. It is a widely used positioning and fixing element. The raw material of the elastic clasp is generally 65 steel, 65Mn, 60Si2Mn spring steel, etc., and the hardness of the finished clasp is generally 40HRC-51HRC. However, with the development direction of energy saving and weight reduction of automobiles, it is required to increase the strength, reduce weight, and increase the lifespan of various parts of the automobile. The existing snap ring products with hardness are difficult to match with ultra-high-strength parts, and snap rings with h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/52C21C7/10C21D1/18C21D1/32C21D1/58C21D1/74C21D6/00C21D8/06C21D9/40C21D9/52C22C38/02C22C38/04C22C38/06C22C38/12B21C37/00
CPCB21C37/00C21C5/52C21C7/10C21D1/18C21D1/32C21D1/58C21D1/74C21D6/005C21D6/008C21D8/065C21D9/40C21D9/525C21D2211/001C21D2211/005C22C38/002C22C38/02C22C38/04C22C38/06C22C38/12Y02P10/20
Inventor 姜婷汪开忠于同仁刘学华王伟龚梦强张晓瑞尹德福孙凯郝震宇
Owner MAGANG (GROUP) HOLDING CO LTD
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