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Cold-rolled steel sheet and manufacturing method thereof

一种冷轧钢板、制造方法的技术，应用在制造工具、金属轧制、炉子类型等方向，能够解决过度的温度升高、过热点等问题，达到提高冲裁性的效果

Active Publication Date: 2017-06-13
NISSHIN STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both will lead to excessive temperature rise that cannot be dealt with in the prior art, that is, cause hot spots

Method used

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  • Cold-rolled steel sheet and manufacturing method thereof
  • Cold-rolled steel sheet and manufacturing method thereof
  • Cold-rolled steel sheet and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0130] Hereinafter, this Example and a comparative example are demonstrated.

[0131] First, slabs having chemical compositions shown in Table 1 were melted. It should be noted that, in Table 1, in the case of not containing at least one of Cr, Ni, Mo and B, the value on the left side of the formula (1) is shown as Q value; And in the case of at least one of B, the value on the left side of the formula (3) is shown as Q value.

[0132] [Table 1]

[0133]

[0134] Using each billet, hot rolling and cold rolling were performed under the conditions shown in Table 2 to produce each test material.

[0135] In hot rolling, the heating temperature was set to 1250°C or 1100°C, and the coiling temperature was set to any one of 450°C, 520°C, 570°C, 600°C, 630°C, 650°C, and 720°C.

[0136] In addition, the hot-rolled steel sheets were pickled with hydrochloric acid and then finished rolled to a sheet thickness of 1.8 mm at various cold rolling ratios. In addition, the cross-sectio...

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Abstract

A cold-rolled steel plate having favorable heat spot resistance, favorable antiwear performance, and favorable punching performance is provided. The cold-rolled steel plate has a chemical composition containing, on the basis of percent by mass, C from 0.03 to 0.08%, Si from 0 to 1.0%, Mn from 0.2 to 0.8%, P at 0.03% or less, S at 0.01% or less, and Al at 0.05% or less so as to satisfy the following relationship: 5 * C% - Si% + Mn% - 1.5 * Al% < 1. The chemical composition further contains, on the basis of percent by mass, at least one of Nb from 0.03 to 0.4%, V from 0.01 to 0.3%, and Ti from 0.01 to 0.3% so as to satisfy the following relationship: 0.04 < (Nb% / 1.4) + (V% / 1.1) + Ti% < 0.3. An average diameter of particles of a carbide as a precipitate is from 20 to 100 nm. A second phase structure having a longitudinal diameter of 5 µm or more has an area fraction of 5% or less in a cross-sectional structure.

Description

technical field [0001] The present invention relates to a cold-rolled steel sheet used for, for example, a clutch disc and the like, and a method for producing the same. Background technique [0002] In the wet multi-disc clutch of an automatic transmission, a plurality of friction plates on which a friction material made of special paper is pasted on the surface and release plates in contact with the friction plates are alternately arranged. In addition, power transmission is controlled by switching the separation and engagement of the friction plate and the release plate. [0003] Both the friction plate and the separation plate are ring-shaped steel plate parts. It should be noted that these friction plates and separation plates constituting the wet multi-plate clutch are generally referred to as clutch plates. [0004] As the main failure phenomena that occur on the separator, the following four are known: wear of the spline part (hereinafter referred to as property A)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/14C22C38/54C21D8/02C21D9/46
CPCC21D8/02C21D8/0205C21D8/0226C21D8/0236C21D8/0273C21D9/46C21D2211/004C21D2211/005C22C38/002C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C22C38/26C22C38/28Y02P10/20B21B1/22B21B45/004
Inventor 田头聪铃木雅人今中智博
Owner NISSHIN STEEL CO LTD