钢铁论文翻译1. IntroductionStrength and rigidity are generally required in automobileparts. However, suspension and chassis partsmust also meet durability-related requirements, includingfatigue characteristics, corrosion resistance, andother pr

钢铁论文翻译1. IntroductionStrength and rigidity are generally required in automobileparts. However, suspension and chassis partsmust also meet durability-related requirements, includingfatigue characteristics, corrosion resistance, andother pr
钢铁论文翻译
1. Introduction
Strength and rigidity are generally required in automobile
parts. However, suspension and chassis parts
must also meet durability-related requirements, including
fatigue characteristics, corrosion resistance, and
other properties. Therefore, unlike the auto body, which
is made largely from cold rolled steel sheets, mainly
heavy gauge hot rolled steel sheets are used in chassis
applications. Moreover, as automobile weight reduction
has proceeded, high strength materials with tensile
strength of 440–590 MPa class have also been increasingly
adopted in chassis applications, replacing mild
steel.
On the other hand, due to restrictions in the suspension
layout and the need to avoid interference between
parts under large inputs, chassis and suspension part
shapes have tended to become more complex, and composite
forming involving stretch-forming and stretchfl
anging techniques such as burring, etc. are frequently
used in the manufacture of these parts. Hole expansionability
and elongation are required in these forming
modes. However, it is known that these two properties
are generally mutually contradictory in steel sheets.
Dual-phase (DP) steels sheets and low alloy retained
austenite (TRIP) steel sheets are known to show high
elongation. However, since these steels are characterized
by a large difference in hardness between the main
phase, which consists of soft polygonal ferrite, and the
hard second phase of martensite, etc., it was diffi cult to
increase hole expansionability because of voids form at
the interphase between these phases during punching. To
remedy this problem, bainite single phase and bainitic
ferrite single phase steel sheets have been developed
in order to reduce the hardness difference between the
main and second phases, but it cannot be said that the
balance of strength and hole expansionability is adequate,
particularly in materials with tensile strength of
780 MPa class and higher. As additional problems, due
to heavy use of Si, a type of surface roughness called “red
scale” and internal oxidation are remarkable, resulting in
reduced fatigue characteristics and phosphatability/corrosion
resistance1).
This paper introduces two new high strength hot
rolled steel sheets which are suitable for automobile
suspension and chassis parts, (1) “NANOHITEN,” a precipitation
hardened high strength hot rolled steel sheet 不胜感谢 哪为同学可以翻译

钢铁论文翻译1. IntroductionStrength and rigidity are generally required in automobileparts. However, suspension and chassis partsmust also meet durability-related requirements, includingfatigue characteristics, corrosion resistance, andother pr
1 .导言
强度和刚度,一般需要在汽车
部分.然而,暂停和底盘部件
还必须满足耐久性有关的要求,包括
疲劳特性,耐腐蚀,和
其他财产.因此,不同的车身,这
经费主要来自冷轧钢板,主要
沉重的衡量热轧钢板用于底盘
应用.此外,由于汽车减重
已开始,高强度材料的抗拉强度
实力440-590兆帕级也日益
通过在底盘应用,取代轻度
钢铁.
另一方面,由于限制的暂停
布局和需要,以避免干扰
部分大的投入下,底盘和悬挂系统的一部分
形状往往变得更加复杂,综合
形成涉及拉形和stretchfl
anging技术,如翻边等,常常
用于制造这些零件.孔expansionability
和伸长率要求在这些成形
模式.然而,众所周知,这两个属性
通常是相互矛盾的钢板.
双相（民主党）钢低合金板和保留
奥氏体（旅行）钢板已知查看高
伸长率.然而,由于这些钢的特点
由一个大的差异硬度之间的主要
阶段,其中包括软多边形铁素体和
第二阶段的艰苦马氏体等,这是困难邪教
增加孔expansionability因为空隙形式
之间的界面冲压过程中这些阶段.至
解决这一问题,贝氏体单相和贝氏体
铁素体单相钢板已制定
为了减少硬度之间的差异
主要阶段和第二阶段,但不能说,
平衡的力量和孔expansionability是足够的,
特别是在材料的抗拉强度
780兆帕级及以上.因
对大量使用的硅,是一种表面粗糙度称为“红色
规模“和内部氧化显着,导致
减少疲劳特性和phosphatability /腐蚀
resistance1 ） .
本文介绍了两种新的高强度热
轧制钢板适合汽车
悬架和底盘部件,（ 1 ） “ NANOHITEN ,”降水
硬化高强度热轧钢板

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