工字鋼如名所示，是一種“工”字形截面型鋼，上下翼緣內(nèi)表面有傾斜度，一般為1：6，使得翼緣外薄而內(nèi)厚，因此造成工字鋼在兩個(gè)主平面的截面特性相差巨大，在應(yīng)用中難以發(fā)揮剛才的強(qiáng)度特性。雖然工字鋼市場(chǎng)上上也出現(xiàn)了加厚工字鋼，但工字鋼的結(jié)構(gòu)已經(jīng)決定了其抗扭性能短板。Platereferstothegeneralprofiledsteelplate,flatplate,etc。

I like the name suggests, is a kind of I-shaped section steel flange on the inner surface of slope is generally 1:6, the flange and the thickness of thin, resulting in two main characteristics of I-beam section plane is huge, just to play strength characteristics in the application. Although the I-steel market has also appeared to be thickened I-steel, the structure of I-steel has already determined its torsional performance.

合金元素與鐵、碳的相互作用

合金元素加入鋼中后，主要以三種形式存在鋼中。即：與鐵形成固溶體；與碳形成碳化物；在高合金鋼中還可能形成金屬間化合物。

The interaction of alloying elements with iron and carbon

When alloy elements are added to steel, they mainly exist in three forms. Namely: to form a solid solution with iron; carbide and carbon; in high alloy steels are also likely to form intermetallic compounds.

細(xì)木工板（俗稱大芯板、木工板）是具有實(shí)木板芯的膠合板，其豎向（以芯板材走向區(qū)分）抗彎壓強(qiáng)度差，但橫向抗彎壓強(qiáng)度較高。現(xiàn)在市場(chǎng)上大部分是實(shí)心、膠拼、雙面砂光、五層的細(xì)木工板，尺寸規(guī)格為1220 mm×2440mm。

The woodworking board (commonly known as the big core board and woodworking board) is a plywood with solid wood core. Its vertical (core plate to differentiate) is poor in bending strength, but the transverse bending and bending strength is high. Most of the market is solid, plastic, double-sided sanding, five story blockboard,  1220 mm x 2440mm.

特性:裝飾面板一般用于清油裝飾。表層薄而板是名貴木種，紋理天然、華美?；囊话闶悄z合板，性能穩(wěn)定可靠。

Features: decorative panels are generally used for oil decoration. The surface is thin and board is a valuable wood species with natural and beautiful texture. The base material is generally plywood, the performance is stable and reliable.