首页/ 题库 / [问答题]比较铸钢与轧制钢材的性能特点?的答案

比较铸钢与轧制钢材的性能特点?

问答题
2021-12-28 20:13
查看答案

正确答案

轧制钢材是把冷却后的钢铸锭再加热至1200~1300℃的高温,经过轧制、轧延、锻焊而成。轧钢机压力的作用可使钢锭中的小气泡和质地较疏松部分锻焊密实起来,消除铸造显微组织缺陷和细化钢的晶粒。
因此,①轧制钢材比同类铸钢质量好,
②而且压缩比(钢坯与轧成钢材厚度之比)愈大时其强度和冲击韧性等也愈高。另外,由于轧辊的压延作用,钢材顺轧辊轧制方向的强度和冲击韧性等机械性能比其横向的机械性能要好


试题解析

相关题目
boost的意思是:help or encourage to increase or improve
eloquent的意思是:fluent or persuasive in speaking or writing

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

A cabinet or space containing the controls or valves for the fixed firefighting system must be().
A cabinet or space containing the controls or valves for the fixed firefighting system must be().
Logistic回归系数与优势比OR的关系为()。
比较铸钢与轧制钢材的性能特点?
CASE OF DEATH OR SERIOUS INJURY TO A PERSON IN AN ACCIDENT OR SHIPPING DISASTER is().
Mainly east 3 or 4 partly cloudy to overcast occasional rain()slowly south moderate or good.
()any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local quarantine officer must be notified immediately.
Should any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local Quarantine Officer must be()immediately.
Damage to cargo caused by fumes or vapor from liquids,gases, or solids is known as().
Masters are()solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
If he is a common carrier,he is absolutely responsible to the owner of the goods carried ()any loss or damage to them unless caused by an Act of God or the Queen’s enemies,or the inherent vice in the goods themselves,or the negligence of the owner of the goods,or a general average sacrifice.
系统中雷达状态包括Unknown、Operational(or ON)、Failed(or OFF)、Detached。
Owners are to be responsible for loss of or damage to the goods or delay in delivery of the goods only in case the loss,damage or delay has been caused by the improper or negligent stowage of the goods.This means that().
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire,()the claimant proves that the fire arose from fault or neglect on the part of the carrier,his servants or agents.
Shutdown price(or point,or rule) 停业价格(或停业点、停业原则)
翻译:With Average or With Particular Average(WA or WPA)()
()shall be liable for loss of and damage to the Vessel and/or goods arising or resulting from inaccuracies in stating the description,quantity,weight,measurement or contents.
广告位招租WX:84302438

免费的网站请分享给朋友吧