公开(公告)号：KR1020100005970A

公开(公告)日：2010-01-18

申请号：KR1020080066103

申请日：2008-07-08

Applicant: 현대자동차주식회사

Inventor： 이호승

IPC: C21D9/32 ,  C22C38/00

CPC classification number: C22C38/32 ,  C21D1/28 ,  C21D9/32 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/28

Abstract: PURPOSE: A manufacturing method for a gear shift of a vehicle is provided to save the manufacturing cost by improving the work productivity. CONSTITUTION: The alloy steel material consisting of the inevitable impurity is used(S10). The alloy steel material comprises C: 0.17 ~ 0.23 weight%, Si: 0.5 ~ 0.7 weight%, Mn: 0.10 ~ 0.30 weight%, P: less than 0.025 weight%, S: less than 0.025 weight%, Cr: 0.85 ~ 1.25 weight%, Ti: 0.01 ~ 0.04 weight%, N: 0.01 ~ 0.02 weight%, B: 10 ~ 30ppm, and iron(Fe). The alloy steel material is cooling-processed to be a gear shape without an annealing process. The alloy steel material is processed under 930 ~ 980°C for 60 ~ 90 minute(S14). The alloy steel material is carburizing-processed in the low vacuum in order to enhance the surface hardness(S15).

Abstract translation: 目的：提供一种车辆变速的制造方法，通过提高作业效率来节省制造成本。 构成：使用由不可避免的杂质构成的合金钢材料（S10）。 合金钢材料包括C：0.17〜0.23重量％，Si：0.5〜0.7重量％，Mn：0.10〜0.30重量％，P：小于0.025重量％，S：小于0.025重量％，Cr：0.85〜1.25 重量％，Ti：0.01〜0.04重量％，N：0.01〜0.02重量％，B：10〜30ppm，铁（Fe）。 合金钢材料经过冷却处理成没有退火工艺的齿轮形状。 合金钢材料在930〜980℃下加工60〜90分钟（S14）。 合金钢材料在低真空下进行渗碳处理，以提高表面硬度（S15）。

公开(公告)号：KR1020090061428A

公开(公告)日：2009-06-16

申请号：KR1020070128437

申请日：2007-12-11

Applicant: 현대자동차주식회사

Inventor： 이호승

IPC: C22C38/00 ,  C22C38/32

CPC classification number: C22C38/32 ,  C21D8/0278 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/26 ,  C22C38/28

Abstract: Boron steel for gear and a gear manufacturing method using the same are provided to reduce the manufacturing time period by omitting spheroidization and shortening normalizing time. A manufacturing method of boron steel for gear comprises a step of rolling and cutting a material, a step of forging the cut material, a step of normalizing the forged material at 970°C for 60 minutes, and a step of carburizing the normalized material. The material is composed of Fe as base material, C 0.17~0.23 weight%, Si 0.1 weight% or less, Mn 0.40~0.50 weight%, P 0.03 weight% or less, S 0.03 weight% or less, Cr 0.85~1.25 weight%, Ti 0.01~0.04 weight%, N 0.01~0.02 weight%, B 10~30ppm, and Nb 0.015~0.035 weight%. Si, ferrite reinforced element, is added to lower ferrite strength before heat treatment. Nb serves to make carburization at high temperature possible by preventing the coarsening of grain.

Abstract translation: 提供用于齿轮的硼钢和使用其的齿轮制造方法，以通过省略球化并缩短正常化时间来减少制造时间。 用于齿轮的硼钢的制造方法包括轧制和切割材料的步骤，锻造切割材料的步骤，将锻造材料在970℃标准化60分钟的步骤和使归一化材料渗碳的步骤。 该材料由Fe作为基材，C 0.17〜0.23重量％，Si 0.1重量％以下，Mn 0.40〜0.50重量％，P 0.03重量％以下，S 0.03重量％以下，Cr 0.85〜1.25重量 ％，Ti 0.01〜0.04重量％，N 0.01〜0.02重量％，B 10〜30ppm，Nb 0.015〜0.035重量％。 添加Si，铁素体增强元素以降低热处理前的铁素体强度。 Nb用于通过防止晶粒粗化而在高温下进行渗碳。